Professor Dr Eng.- PhD. Metallurgical Engineering-Corrosion Engineering and Surface Protection from the University of Technology in 2004. He has authored for five scientific books in English by international and national publishers, and 40 scientific articles published in international and national, peer-reviewed for highly accredited scientific journals. He has supervised 5 PhD Projects and 9 M.Sc. Dissertations. as well as have a patent about using duplex stainless steel (2507) as a new material in orthodontic wires. Address: University of Kufa-Faculty of Engineering-Materials Engineering Department-Biomedical materials Engineering Track
3rd International Conference on Materials Engineering & Science
(IConMEAS 2020)
Chair of Scission... more 3rd International Conference on Materials Engineering & Science (IConMEAS 2020) Chair of Scission: Prof. Dr .Eng. Ali Sabea Hammood -29th December 2020 Kuala Lumpur-Malaysia
International Journal of Mechanical & Mechatronics Engineering IJMME / IJENS, 2012
In this research, experimental and theoretical study of composite materials reinforcement fiber t... more In this research, experimental and theoretical study of composite materials reinforcement fiber types are presented. The experimental work and the theoretical investigation covered the study of modulus of elasticity for long, short, woven, powder, and particle reinforcement of composite materials types with difference volume fraction of fiber. In addition the compare it the experimental results with theoretical results of modulus of elasticity for difference composite materials types. The results show that the effect of fiber and resin types on modulus of elasticity for composite materials are presented. In addition the effect of volume fraction of fiber and matrix materials on modulus of elasticity for composite materials shown a presented. The results show have good agreement between experimental and theoretical study for different types of composite materials. The results having that shown the best modulus of elasticity for reinforcement composite is unidirectional fiber types in longitudinal direction and the woven reinforcement fiber types for transverse direction.
International Journal of Mechanical Engineering (IJME), IASET, 2012
The existence of a defect like a crack will leads to change in natural frequency of the plate and... more The existence of a defect like a crack will leads to change in natural frequency of the plate and enlargement of the crack will also lead another change in natural frequency with the change of the size or position of the crack. So this study focuses on finding the natural frequency for orthotropic composite plates with crack considering the size of the crack (crack length and depth through plate thickness) an crack position in the plate in x, y directions, also slant of the crack. The natural frequency is studied for composite material strengthen by long, and woven fibers with the effect of crack size and position, plate thickness, aspect ratio, the type of plate fixing where three type of fixing used (SSSS, SSCC, SSFF). Two methods are used to find the natural frequency of composite plate: First method is supposed analytical solution to solve the equation of motion considering the effect of size, and position crack on the natural frequency of the composite plate. Second method is finite element solution using ANSYS (ver. 14) program. A comparison made between the two methods and the error percentage is not exceeds of 3.5%. The results shows that the natural frequency decreases as crack size (length or width) increases. The natural frequency decreases when the crack in the middle of the plate over any position of the crack. The effect of crack when it reaches the middle is higher than when it's in the other places. The natural frequency is decreases as plate width increases, (aspect ratio and plate thickness).
The natural frequency is studied for composite material strengthen by short fibers and long fiber... more The natural frequency is studied for composite material strengthen by short fibers and long fibers, with the effect of crack orientation for different aspect ratio of plate and the type of plate fixing where simply supported in all edges. Two methods are used to find the natural frequency of composite plate: First method is an experimental method by applied a time varied load and admeasure the natural frequency of the plate. Second method is a finite element solution using ANSYS (ver. 14) program. A comparison made between the three methods and the error percentage is not exceeds of 8.5%. The amount of decreasing in natural frequency increases when the crack inclined with an angle than that without inclination angle, because the effect of the crack distributed on the both sides of the plate will be a bigger effect.
The Iraqi Journal for Mechanical and Material Engineering, 2011
In this research, the main objectives of this investigation as, first, study the effect of fibers... more In this research, the main objectives of this investigation as, first, study the effect of fibers orientation on fatigue strength for composite materials, second, study the effect of fiber orientation on shape and direction of fracture surface for composite materials. The experimental work using to study fatigue limit for composite material with different fiber orientation as (0 0 , 30 o , 45 0 , 60 o , 90 o) and study of the fatigue surface (shape and direction of fatigue surface of composite material) for each fiber orientation fiber. The material using for composite material in this research are epoxy resin matrix and glass reinforcement fiber with volume fracture of fiber in composite material about (0.21). The results are endurance fatigue strength with number of cycle for fiber orientation (0 0 , 30 o , 45 0 , 60 o , 90 o) and the shape and direction of surface fatigue of composite material.
International Journal of Mechanical & Mechatronics Engineering IJMME / IJENS, 2012
The existence of a defect like a crack will leads to change in natural frequency of the plate and... more The existence of a defect like a crack will leads to change in natural frequency of the plate and enlargement of the crack will also lead another change in natural frequency with the change of the size or position of the crack. So this study focuses on finding the natural frequency for isotropic composite plates with crack considering the size of the crack (crack length and depth through plate thickness) an crack position in the plate in x, y directions, also slant of the crack. The natural frequency is studied for composite material strengthen by powder, and short fibers with the effect of crack size and position, plate thickness, aspect ratio, the type of plate fixing where three type of fixing used (SSSS, SSCC, SSFF). Two methods are used to find the natural frequency of composite plate: First method is supposed analytical solution to solve the equation of motion considering the effect of size, and position crack on the natural frequency of the composite plate. Second method is finite element solution using ANSYS (ver. 14) program. A comparison made between the two methods and the error percentage is not exceeds of 3.5%. The results shows that the natural frequency decreases as crack size (length or width) increases. The natural frequency decreases when the crack in the middle of the plate over any position of the crack. The effect of crack when it reaches the middle is higher than when it's in the other places. The natural frequency is decreases as plate width increases, (aspect ratio and plate thickness). Index Term-Plate Vibration, Crack Study, Composite Plate with Crack Effect, Crack Plate Vibration.
In this work, natural frequencies of composite plates are studied based on the shape of the fiber... more In this work, natural frequencies of composite plates are studied based on the shape of the fibers. The natural frequencies are studied for composite materials strengthened by isotropic composite material plates, as short fibers, and orthotropic composite materials plates, as long fibers, with the effect of crack orientation effect with different aspect ratio of plate for simply supported plate. The method used to find the natural frequency of composite plate is supposed analytical solution to solve the equation of motion considering the effect of crack orientation with different crack position and crack size on the natural frequency of the composite various aspect ratio of isotropic and orthotropic plate. A comparison made between the analytical results and the results get by finite element solution using ANSYS (ver. 14) program. The comparison shows the error percentage is not exceeds of 2.5%.The results show that the natural frequency decreases as crack size (length or width) increases. The effect of crack when it reaches the middle is higher than when it is in the other places. The natural frequency is decreases as plate width increases, (aspect ratio and plate thickness) and the natural frequency of composite plate decrease with increasing of crack orientation.
The Iraqi Journal For Mechanical And Material Engineering, 2010
In this work, an experimental and analytical solution for tensile properties of hyper composite m... more In this work, an experimental and analytical solution for tensile properties of hyper composite material is presented. The composite material consist of composite matrix, bounded from resin material and short fiber, and long reinforcement fiber. The result for the tensile properties of composite material combined from composite matrix and reinforcement fiber, E 1 , E 2 , G 12 , and 12. In addition, the results showing the effect of volume fraction of short and long fiber, and the types of short and long fiber reinforcement, presented by analytical solution. And, the yield stress of hyper composite material is defined by experimental study with various of volume fraction of resin, short fiber, and long fiber.
Materials Research 2018 Conference: February 19-20, 2018 at Paris, France, 2018
Duplex stainless steels (DSS) which consists of two-phase austenite– ferrite microstructures are ... more Duplex stainless steels (DSS) which consists of two-phase austenite– ferrite microstructures are essential for many applications such as gas refineries, petroleum, and marine media due to their excellent mechanical properties and corrosion resistance. The duplex stainless steel exhibit complicated phase transformations and precipitation behavior since it contains high alloying elements. The heat treatment is required for 2507 and 2205 duplex stainless steel to break down or dissolve secondary phases, removed segregation and to relieve any residual thermal stress in ingots which may be formed during production processes and to better microstructure balance that leads to better properties. The aging treatment was carried out at 800, 850, 900°C for different holding periods (2, 4, 8 min) followed by water quenching. This study aims to obtained better microstructure by select heat treatment conditions and study of the effect of aging treatment on the microstructure balance of 2507 and 2205 DSS and appearance or disappearance of sigma phase (sigma phase has detrimental effect on the DSS properties) was studied by light optical microscopy, scanning electron microscopy, X-ray diffraction and Vickers microhardness. The results indicate that the 2205 DSS less sensitive to secondary phases precipitation than 2507 DSS. The results shown that the specimen was treated at 800°C for 2 min of 2507 DSS only does not contain sigma phase, while all treated specimens of 2205 DSS contain ferrite and austenite only without sigma phase. The heat treatment at 900°C for 2min gives better phases balance between ferrite and austenite (approximately equal volume fraction), while gives larger volume fraction of sigma phase for 2507 DSS as illustrate in Figure 1. The results shown the micro hardness values mainly depend on the presence or absence of secondary phases and ferrite/austenite ratio
Hydroxyapatite (HAp) is one of the vital and bioactive materials that are commonly used in biomed... more Hydroxyapatite (HAp) is one of the vital and bioactive materials that are commonly used in biomedical field and concentrated in clinical area. It is a bio-ceramic powder synthesized by using different bio-waste materials such as bovine femur bone. In this study, the bovine femur bone powder was prepared to obtain nano powder. The purpose of this study was to reach the optimal temperature to obtain nanoparticles HAp. The resulted powder was calcinated in a furnace at different temperatures (900, 950, 1000, 1050 and 1100 °C) for 2 h at the heating rate of 10 °C/min and cooled slowly in a furnace. Results showed, the formation of pure HAp by the presence of peaks corresponding to (PO 4) 3-at 632/cm and OH-at 3,572/cm in fourier transformation infrared spectroscopy (FTIR). For the calcined samples, there were three main peaks of 211, 112 and 300 planes at 2θ near 31.8, 32.2 and 32.9 respectively. The amorphous raw bones were transformed into crystalline phase and the lattice parameters for HAp c and a were calculated in X-ray diffraction (XRD), Raman analysis showed that the calcination process removed the organic compound from the bovine femur bones matrix. Scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX) showed that the shape of the granules was irregular, containing quantities of oxygen, magnesium, sodium and carbon; the ratio of calcium to phosphate was calculated, Atomic force microscopy (AFM) showed that the particles sizes ranged from nanometers to microns. EDX result found that the calcium to phosphate ratio reached 1.7058 after calcination at 950 °C which was close to stoichiometric hydroxyapatite (1.67). This result implied the formation of pure HAp phase at 950 °C.
This study aims to synthesize and characterize hydroxyapatite (HAp) bio-ceramic powder. Calcinati... more This study aims to synthesize and characterize hydroxyapatite (HAp) bio-ceramic powder. Calcination treatment was applied to produce the hydroxyapatite powders from Camelus bone as an eco-friendly and inexpensive source. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, field emission scanning electron microscopy (FESEM) with energy-dispersive X-ray spectrometry (EDS), and atomic force microscopy (AFM) were carried out to characterize the synthesized powder. XRD results showed that material obtained at calcination temperature (1000 °C) is a HAp according to (ICDD 00-024-0033) pattern in a 1.6557 Ca/P molar ratio and the chemical composition is Ca5(PO4)3(OH). The FTIR and Raman spectra confirm the formation of HAp by the presence of peaks corresponding to (PO4)3− and OH− groups, which are of great importance in HAp molecules. The experimental results of FESEM and AFM showed that the shape of the hydroxyapatite particles was irregular with the particle size ranging from 79 nm to 0.9 μm.
In this paper, an empirical model is applied to predict the hardness, yield strength, and tensile... more In this paper, an empirical model is applied to predict the hardness, yield strength, and tensile strength of rapid solidified ribbons. The discovered empirical equation is obtained depends upon the experimental results of rapid solidification process for 5083 Al-alloys. The empirical equations predict values and describe the behavior of ribbon with consideration of ribbon thickness, grain size, hardness, yield strength, and tensile strength. The experimental work involves difference operation conditions and the results indicate that orifice diameter, nozzle roll wheel gap, and melting temperature have direct impact on the quality of alloy. Additionally, the results showed that there is a good agreement between experimental and predicted values where the correlation coefficient is 0.99. The experimental show that there is a possibility to produce very thin ribbons with thickness in micrometer by reducing the distance between nozzle and roll wheel, and reduce the orifice diameter of casting. The hardness, and yield strength increased due to increasing the number of small grain size in the ribbons structure and rapidly heat transfer of the small ribbons thickness. Moreover, the optimal melting temperature of this alloy is 925ºC which produces high ribbon hardness compared with other melting temperature that used in this research.
In this paper, single roll melt spinning technique is used as a sustainable manufacturing process... more In this paper, single roll melt spinning technique is used as a sustainable manufacturing process to reduce waste, time, energy, and cost. The non-conventional forming machine is manufacturing to produce very thin ribbon of 5052 and 5083 Al-Mg alloys in the range of micrometer. It is a tool for modifying the microstructure of alloy and improved their properties. The process has a direct impact for saving materials, machine, method, men, and money (5M) compared with conventional forming technology due to their ability to produce very thin ribbons directly from liquid state. The properties of the produced ribbons were investigated and the result indicating that there is a possibility to produce ribbons with micro thickness of 20 to 330 µm and width of 0.97 to 7.4 mm. Moreover, the hardness was improved to be more than twice of the original hardness of alloy. The corrosion resistance of alloy was improved and their rate was reduced.
Effect of Erosion on Water Absorption and Morphology for Treated Date Palm Fiber-Reinforced Polyester Composites, Dec 2015
In this study, a composite material contains a matrix (Polyester resin) and a natural fiber (Date... more In this study, a composite material contains a matrix (Polyester resin) and a natural fiber (Date Palm) was prepared. The volume fraction for date palm fibers was 40% in all prepared composite materials. All samples were prepared by hand lay-up process, A chemical treatment with at 5% concentration Maleic acid solutions for 20 hours is conducted, and tested under erosion conditions. The results showed a weight gain with time due to the presence of voids on the surface of the composite. Also, the increasing of drying time leads to decrease water absorption in case of the longitudinal direction and transverse direction for date palm fibers in composite materials.
Abstract
A 2 kW CO2 laser was used to modify the surface of air plasma sprayed (APS) 7.8 wt% ytt... more Abstract
A 2 kW CO2 laser was used to modify the surface of air plasma sprayed (APS) 7.8 wt% yttria partially stabilized zirconia (YPSZ) coatings; the effects of laser specific energy was investigated. The sealed coatings were characterized by SEM, EDS, WDS, XRD and microhardness. It was possible to control the cell size (or well-sintered ‘domain like’ structure), crack width, depth of sealing and depth of concavity by carefully adjusting the specific energy. The microstructure of the sealed coatings was characterized by a cellular structure at all laser parameters studied. Cracks formed under optimum specific energies (1–2 J/mm²) were seen to be shallow and they do not penetrate through the plasma sprayed coating. The sealed coatings have much lower roughness and higher hardness than non-treated coatings indicating the beneficial effect of plasma treatment.
3rd International Conference on Materials Engineering & Science
(IConMEAS 2020)
Chair of Scission... more 3rd International Conference on Materials Engineering & Science (IConMEAS 2020) Chair of Scission: Prof. Dr .Eng. Ali Sabea Hammood -29th December 2020 Kuala Lumpur-Malaysia
International Journal of Mechanical & Mechatronics Engineering IJMME / IJENS, 2012
In this research, experimental and theoretical study of composite materials reinforcement fiber t... more In this research, experimental and theoretical study of composite materials reinforcement fiber types are presented. The experimental work and the theoretical investigation covered the study of modulus of elasticity for long, short, woven, powder, and particle reinforcement of composite materials types with difference volume fraction of fiber. In addition the compare it the experimental results with theoretical results of modulus of elasticity for difference composite materials types. The results show that the effect of fiber and resin types on modulus of elasticity for composite materials are presented. In addition the effect of volume fraction of fiber and matrix materials on modulus of elasticity for composite materials shown a presented. The results show have good agreement between experimental and theoretical study for different types of composite materials. The results having that shown the best modulus of elasticity for reinforcement composite is unidirectional fiber types in longitudinal direction and the woven reinforcement fiber types for transverse direction.
International Journal of Mechanical Engineering (IJME), IASET, 2012
The existence of a defect like a crack will leads to change in natural frequency of the plate and... more The existence of a defect like a crack will leads to change in natural frequency of the plate and enlargement of the crack will also lead another change in natural frequency with the change of the size or position of the crack. So this study focuses on finding the natural frequency for orthotropic composite plates with crack considering the size of the crack (crack length and depth through plate thickness) an crack position in the plate in x, y directions, also slant of the crack. The natural frequency is studied for composite material strengthen by long, and woven fibers with the effect of crack size and position, plate thickness, aspect ratio, the type of plate fixing where three type of fixing used (SSSS, SSCC, SSFF). Two methods are used to find the natural frequency of composite plate: First method is supposed analytical solution to solve the equation of motion considering the effect of size, and position crack on the natural frequency of the composite plate. Second method is finite element solution using ANSYS (ver. 14) program. A comparison made between the two methods and the error percentage is not exceeds of 3.5%. The results shows that the natural frequency decreases as crack size (length or width) increases. The natural frequency decreases when the crack in the middle of the plate over any position of the crack. The effect of crack when it reaches the middle is higher than when it's in the other places. The natural frequency is decreases as plate width increases, (aspect ratio and plate thickness).
The natural frequency is studied for composite material strengthen by short fibers and long fiber... more The natural frequency is studied for composite material strengthen by short fibers and long fibers, with the effect of crack orientation for different aspect ratio of plate and the type of plate fixing where simply supported in all edges. Two methods are used to find the natural frequency of composite plate: First method is an experimental method by applied a time varied load and admeasure the natural frequency of the plate. Second method is a finite element solution using ANSYS (ver. 14) program. A comparison made between the three methods and the error percentage is not exceeds of 8.5%. The amount of decreasing in natural frequency increases when the crack inclined with an angle than that without inclination angle, because the effect of the crack distributed on the both sides of the plate will be a bigger effect.
The Iraqi Journal for Mechanical and Material Engineering, 2011
In this research, the main objectives of this investigation as, first, study the effect of fibers... more In this research, the main objectives of this investigation as, first, study the effect of fibers orientation on fatigue strength for composite materials, second, study the effect of fiber orientation on shape and direction of fracture surface for composite materials. The experimental work using to study fatigue limit for composite material with different fiber orientation as (0 0 , 30 o , 45 0 , 60 o , 90 o) and study of the fatigue surface (shape and direction of fatigue surface of composite material) for each fiber orientation fiber. The material using for composite material in this research are epoxy resin matrix and glass reinforcement fiber with volume fracture of fiber in composite material about (0.21). The results are endurance fatigue strength with number of cycle for fiber orientation (0 0 , 30 o , 45 0 , 60 o , 90 o) and the shape and direction of surface fatigue of composite material.
International Journal of Mechanical & Mechatronics Engineering IJMME / IJENS, 2012
The existence of a defect like a crack will leads to change in natural frequency of the plate and... more The existence of a defect like a crack will leads to change in natural frequency of the plate and enlargement of the crack will also lead another change in natural frequency with the change of the size or position of the crack. So this study focuses on finding the natural frequency for isotropic composite plates with crack considering the size of the crack (crack length and depth through plate thickness) an crack position in the plate in x, y directions, also slant of the crack. The natural frequency is studied for composite material strengthen by powder, and short fibers with the effect of crack size and position, plate thickness, aspect ratio, the type of plate fixing where three type of fixing used (SSSS, SSCC, SSFF). Two methods are used to find the natural frequency of composite plate: First method is supposed analytical solution to solve the equation of motion considering the effect of size, and position crack on the natural frequency of the composite plate. Second method is finite element solution using ANSYS (ver. 14) program. A comparison made between the two methods and the error percentage is not exceeds of 3.5%. The results shows that the natural frequency decreases as crack size (length or width) increases. The natural frequency decreases when the crack in the middle of the plate over any position of the crack. The effect of crack when it reaches the middle is higher than when it's in the other places. The natural frequency is decreases as plate width increases, (aspect ratio and plate thickness). Index Term-Plate Vibration, Crack Study, Composite Plate with Crack Effect, Crack Plate Vibration.
In this work, natural frequencies of composite plates are studied based on the shape of the fiber... more In this work, natural frequencies of composite plates are studied based on the shape of the fibers. The natural frequencies are studied for composite materials strengthened by isotropic composite material plates, as short fibers, and orthotropic composite materials plates, as long fibers, with the effect of crack orientation effect with different aspect ratio of plate for simply supported plate. The method used to find the natural frequency of composite plate is supposed analytical solution to solve the equation of motion considering the effect of crack orientation with different crack position and crack size on the natural frequency of the composite various aspect ratio of isotropic and orthotropic plate. A comparison made between the analytical results and the results get by finite element solution using ANSYS (ver. 14) program. The comparison shows the error percentage is not exceeds of 2.5%.The results show that the natural frequency decreases as crack size (length or width) increases. The effect of crack when it reaches the middle is higher than when it is in the other places. The natural frequency is decreases as plate width increases, (aspect ratio and plate thickness) and the natural frequency of composite plate decrease with increasing of crack orientation.
The Iraqi Journal For Mechanical And Material Engineering, 2010
In this work, an experimental and analytical solution for tensile properties of hyper composite m... more In this work, an experimental and analytical solution for tensile properties of hyper composite material is presented. The composite material consist of composite matrix, bounded from resin material and short fiber, and long reinforcement fiber. The result for the tensile properties of composite material combined from composite matrix and reinforcement fiber, E 1 , E 2 , G 12 , and 12. In addition, the results showing the effect of volume fraction of short and long fiber, and the types of short and long fiber reinforcement, presented by analytical solution. And, the yield stress of hyper composite material is defined by experimental study with various of volume fraction of resin, short fiber, and long fiber.
Materials Research 2018 Conference: February 19-20, 2018 at Paris, France, 2018
Duplex stainless steels (DSS) which consists of two-phase austenite– ferrite microstructures are ... more Duplex stainless steels (DSS) which consists of two-phase austenite– ferrite microstructures are essential for many applications such as gas refineries, petroleum, and marine media due to their excellent mechanical properties and corrosion resistance. The duplex stainless steel exhibit complicated phase transformations and precipitation behavior since it contains high alloying elements. The heat treatment is required for 2507 and 2205 duplex stainless steel to break down or dissolve secondary phases, removed segregation and to relieve any residual thermal stress in ingots which may be formed during production processes and to better microstructure balance that leads to better properties. The aging treatment was carried out at 800, 850, 900°C for different holding periods (2, 4, 8 min) followed by water quenching. This study aims to obtained better microstructure by select heat treatment conditions and study of the effect of aging treatment on the microstructure balance of 2507 and 2205 DSS and appearance or disappearance of sigma phase (sigma phase has detrimental effect on the DSS properties) was studied by light optical microscopy, scanning electron microscopy, X-ray diffraction and Vickers microhardness. The results indicate that the 2205 DSS less sensitive to secondary phases precipitation than 2507 DSS. The results shown that the specimen was treated at 800°C for 2 min of 2507 DSS only does not contain sigma phase, while all treated specimens of 2205 DSS contain ferrite and austenite only without sigma phase. The heat treatment at 900°C for 2min gives better phases balance between ferrite and austenite (approximately equal volume fraction), while gives larger volume fraction of sigma phase for 2507 DSS as illustrate in Figure 1. The results shown the micro hardness values mainly depend on the presence or absence of secondary phases and ferrite/austenite ratio
Hydroxyapatite (HAp) is one of the vital and bioactive materials that are commonly used in biomed... more Hydroxyapatite (HAp) is one of the vital and bioactive materials that are commonly used in biomedical field and concentrated in clinical area. It is a bio-ceramic powder synthesized by using different bio-waste materials such as bovine femur bone. In this study, the bovine femur bone powder was prepared to obtain nano powder. The purpose of this study was to reach the optimal temperature to obtain nanoparticles HAp. The resulted powder was calcinated in a furnace at different temperatures (900, 950, 1000, 1050 and 1100 °C) for 2 h at the heating rate of 10 °C/min and cooled slowly in a furnace. Results showed, the formation of pure HAp by the presence of peaks corresponding to (PO 4) 3-at 632/cm and OH-at 3,572/cm in fourier transformation infrared spectroscopy (FTIR). For the calcined samples, there were three main peaks of 211, 112 and 300 planes at 2θ near 31.8, 32.2 and 32.9 respectively. The amorphous raw bones were transformed into crystalline phase and the lattice parameters for HAp c and a were calculated in X-ray diffraction (XRD), Raman analysis showed that the calcination process removed the organic compound from the bovine femur bones matrix. Scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX) showed that the shape of the granules was irregular, containing quantities of oxygen, magnesium, sodium and carbon; the ratio of calcium to phosphate was calculated, Atomic force microscopy (AFM) showed that the particles sizes ranged from nanometers to microns. EDX result found that the calcium to phosphate ratio reached 1.7058 after calcination at 950 °C which was close to stoichiometric hydroxyapatite (1.67). This result implied the formation of pure HAp phase at 950 °C.
This study aims to synthesize and characterize hydroxyapatite (HAp) bio-ceramic powder. Calcinati... more This study aims to synthesize and characterize hydroxyapatite (HAp) bio-ceramic powder. Calcination treatment was applied to produce the hydroxyapatite powders from Camelus bone as an eco-friendly and inexpensive source. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, field emission scanning electron microscopy (FESEM) with energy-dispersive X-ray spectrometry (EDS), and atomic force microscopy (AFM) were carried out to characterize the synthesized powder. XRD results showed that material obtained at calcination temperature (1000 °C) is a HAp according to (ICDD 00-024-0033) pattern in a 1.6557 Ca/P molar ratio and the chemical composition is Ca5(PO4)3(OH). The FTIR and Raman spectra confirm the formation of HAp by the presence of peaks corresponding to (PO4)3− and OH− groups, which are of great importance in HAp molecules. The experimental results of FESEM and AFM showed that the shape of the hydroxyapatite particles was irregular with the particle size ranging from 79 nm to 0.9 μm.
In this paper, an empirical model is applied to predict the hardness, yield strength, and tensile... more In this paper, an empirical model is applied to predict the hardness, yield strength, and tensile strength of rapid solidified ribbons. The discovered empirical equation is obtained depends upon the experimental results of rapid solidification process for 5083 Al-alloys. The empirical equations predict values and describe the behavior of ribbon with consideration of ribbon thickness, grain size, hardness, yield strength, and tensile strength. The experimental work involves difference operation conditions and the results indicate that orifice diameter, nozzle roll wheel gap, and melting temperature have direct impact on the quality of alloy. Additionally, the results showed that there is a good agreement between experimental and predicted values where the correlation coefficient is 0.99. The experimental show that there is a possibility to produce very thin ribbons with thickness in micrometer by reducing the distance between nozzle and roll wheel, and reduce the orifice diameter of casting. The hardness, and yield strength increased due to increasing the number of small grain size in the ribbons structure and rapidly heat transfer of the small ribbons thickness. Moreover, the optimal melting temperature of this alloy is 925ºC which produces high ribbon hardness compared with other melting temperature that used in this research.
In this paper, single roll melt spinning technique is used as a sustainable manufacturing process... more In this paper, single roll melt spinning technique is used as a sustainable manufacturing process to reduce waste, time, energy, and cost. The non-conventional forming machine is manufacturing to produce very thin ribbon of 5052 and 5083 Al-Mg alloys in the range of micrometer. It is a tool for modifying the microstructure of alloy and improved their properties. The process has a direct impact for saving materials, machine, method, men, and money (5M) compared with conventional forming technology due to their ability to produce very thin ribbons directly from liquid state. The properties of the produced ribbons were investigated and the result indicating that there is a possibility to produce ribbons with micro thickness of 20 to 330 µm and width of 0.97 to 7.4 mm. Moreover, the hardness was improved to be more than twice of the original hardness of alloy. The corrosion resistance of alloy was improved and their rate was reduced.
Effect of Erosion on Water Absorption and Morphology for Treated Date Palm Fiber-Reinforced Polyester Composites, Dec 2015
In this study, a composite material contains a matrix (Polyester resin) and a natural fiber (Date... more In this study, a composite material contains a matrix (Polyester resin) and a natural fiber (Date Palm) was prepared. The volume fraction for date palm fibers was 40% in all prepared composite materials. All samples were prepared by hand lay-up process, A chemical treatment with at 5% concentration Maleic acid solutions for 20 hours is conducted, and tested under erosion conditions. The results showed a weight gain with time due to the presence of voids on the surface of the composite. Also, the increasing of drying time leads to decrease water absorption in case of the longitudinal direction and transverse direction for date palm fibers in composite materials.
Abstract
A 2 kW CO2 laser was used to modify the surface of air plasma sprayed (APS) 7.8 wt% ytt... more Abstract
A 2 kW CO2 laser was used to modify the surface of air plasma sprayed (APS) 7.8 wt% yttria partially stabilized zirconia (YPSZ) coatings; the effects of laser specific energy was investigated. The sealed coatings were characterized by SEM, EDS, WDS, XRD and microhardness. It was possible to control the cell size (or well-sintered ‘domain like’ structure), crack width, depth of sealing and depth of concavity by carefully adjusting the specific energy. The microstructure of the sealed coatings was characterized by a cellular structure at all laser parameters studied. Cracks formed under optimum specific energies (1–2 J/mm²) were seen to be shallow and they do not penetrate through the plasma sprayed coating. The sealed coatings have much lower roughness and higher hardness than non-treated coatings indicating the beneficial effect of plasma treatment.
MAE-4th Year-Design & Selection of Materials- Lecture 12: Design of Polymer Materials Model for Visco-Elasticity , 2020
MAE-4th Year-Design & Selection of Materials- Lecture 12: Design of Polymer Materials Model for V... more MAE-4th Year-Design & Selection of Materials- Lecture 12: Design of Polymer Materials Model for Visco-Elasticity (2019-2020)
MAE- 4th Year - Design & Selection of Materials- Lecture 03-Design against Elastic Deformation, 2020
MAE- 4th Year - Design & Selection of Materials- Lecture 03-Design against Elastic Deformation (... more MAE- 4th Year - Design & Selection of Materials- Lecture 03-Design against Elastic Deformation (2019-2020)
MAE- 4th Year - Design &Selection of Materials- Lecture 2: THE IMPORTANCE OF STANDARDS in Design (2019-2020), 2020
MAE- 4th Year - Design &Selection of Materials- Lecture 2: THE IMPORTANCE OF STANDARDS in Design ... more MAE- 4th Year - Design &Selection of Materials- Lecture 2: THE IMPORTANCE OF STANDARDS in Design (2019-2020)
Uploads
(IConMEAS 2020)
Chair of Scission: Prof. Dr .Eng. Ali Sabea Hammood
-29th December 2020
Kuala Lumpur-Malaysia
A 2 kW CO2 laser was used to modify the surface of air plasma sprayed (APS) 7.8 wt% yttria partially stabilized zirconia (YPSZ) coatings; the effects of laser specific energy was investigated. The sealed coatings were characterized by SEM, EDS, WDS, XRD and microhardness. It was possible to control the cell size (or well-sintered ‘domain like’ structure), crack width, depth of sealing and depth of concavity by carefully adjusting the specific energy. The microstructure of the sealed coatings was characterized by a cellular structure at all laser parameters studied. Cracks formed under optimum specific energies (1–2 J/mm²) were seen to be shallow and they do not penetrate through the plasma sprayed coating. The sealed coatings have much lower roughness and higher hardness than non-treated coatings indicating the beneficial effect of plasma treatment.
(IConMEAS 2020)
Chair of Scission: Prof. Dr .Eng. Ali Sabea Hammood
-29th December 2020
Kuala Lumpur-Malaysia
A 2 kW CO2 laser was used to modify the surface of air plasma sprayed (APS) 7.8 wt% yttria partially stabilized zirconia (YPSZ) coatings; the effects of laser specific energy was investigated. The sealed coatings were characterized by SEM, EDS, WDS, XRD and microhardness. It was possible to control the cell size (or well-sintered ‘domain like’ structure), crack width, depth of sealing and depth of concavity by carefully adjusting the specific energy. The microstructure of the sealed coatings was characterized by a cellular structure at all laser parameters studied. Cracks formed under optimum specific energies (1–2 J/mm²) were seen to be shallow and they do not penetrate through the plasma sprayed coating. The sealed coatings have much lower roughness and higher hardness than non-treated coatings indicating the beneficial effect of plasma treatment.