Page 1. 1 STRUČNI RAD Primena elektrohemijskih metoda za ispitivanje interkristalne korozije zava... more Page 1. 1 STRUČNI RAD Primena elektrohemijskih metoda za ispitivanje interkristalne korozije zavarenog spoja austenitnog nerĎajućeg čelika 19Cr-9Ni Bore V. Jegdić 1 , Ana B. Alil 1 , Zlatan R. Milutinović 1 , Zoran D. Odanović 2 , Bojan R. Gligorijević 1 , Boris T. Katavić 1 ...
In this study, fully annealed AA5083 type alloy sheets with 1 mm in thickness were processed by a... more In this study, fully annealed AA5083 type alloy sheets with 1 mm in thickness were processed by accumulative roll bonding (ARB) at room temperature, up to 6 ARB cycles. It was found that microstructure was refined and mechanical properties were significantly improved with ARB processing. The maximum achieved values of hardness and tensile strength were two and three times greater than that of the initial material, respectively. This was attributed to the intensive strain hardening and grain size refinement which occurred during ARB deformation. However, the uniform elongation values were decreased by increasing the number of ARB cycles, and early fracture was registered. SEM fractography of fractured surfaces after tensile tests revealed a typical ductile fracture of ARB processed specimens, which was changed with ARB deformation. It was observed that ductile area on the fractured surfaces and the amount of necking, which occured before fracture, were decreased with increasing the n...
ABSTRACT The effect of different thermo-mechanical processing parameters on the baking response, ... more ABSTRACT The effect of different thermo-mechanical processing parameters on the baking response, and intergranular corrosion (IGC) resistance of an Al-4.6 wt% Mg-0.54 wt% Cu alloy was investigated. It has been shown that the high temperature anneal at 530 °C resulted in superior baking response of pre-deformed material after short annealing at 140-180 °C, compared to the annealing at 280 °C. Specimens pre-deformed 2% had positive baking response for both initial annealing temperatures, however, pre-deformation of 5% induced softening during the baking treatment of the specimens annealed at 280 °C. Prior to sensitization of 7 days at 100 °C, specimens at all stages of thermo-mechanical treatment were IGC resistant. After the sensitization specimens that underwent annealing at 530 °C remained IGC resistant, but specimens that underwent annealing at 280 °C became IGC susceptible. Better corrosion properties and baking response are related to the higher Cu content in solid solution after annealing at 530 °C than at 280 °C.
This paper analysis the causes dynamically loaded screws failure, using the structural analysis o... more This paper analysis the causes dynamically loaded screws failure, using the structural analysis of mechanical properties and numerical simulation. The comparison with the new unbroken screws, which were not in use, has been done to determine the condition of the broken (dynamically loaded) ones. Analysis was performed, according to the following test methods and activities: non-destructive testing, visual inspection, radiographic testing, chemical analysis of screws sample materials, mechanical properties of screws' materials. Structure analysis of screws materials: Testing macrostructure (light optical microscope, SEM-EDS) examination of the microstructure (light optical microscope, SEM-EDS), fractographic examination. Numerical simulation of the stress state of the dynamically loaded screws was done in CATIA software package, and it was identical to the bolt loads, during service exploitation. The results between numerical simulation and structural analysis were quite coincidi...
Sensitization degree of the austenitic stainless steel welded joints was investigated by electroc... more Sensitization degree of the austenitic stainless steel welded joints was investigated by electrochemical methods of the double loop electrochemical potentiokinetic reactivation (DL EPR) in H2SO4 + KSCN solution, and by the measurement of corrosion potential of the steel in the drop of the solution of HNO3 + FeCl3 + HCl. The welded joints were tested by X-ray radiographic method in order to check the presence of the weld defects. Grain size of the base metal and the welded joints were determined by optical microscopy. Good agreement between the results obtained by different electrochemical methods was obtained. Heat-affected zone (HAZ) of the austenitic stainless steel welded joints has shown significant degree of sensitization. The double loop electrochemical potentiokinetic method gave quantitative evidence about susceptibility of the stainless steel to intergranular corrosion.
A spearhead of archaeological and cultural significance has been found and analysed in Serbia. In... more A spearhead of archaeological and cultural significance has been found and analysed in Serbia. In the corrosion products of the artefact, the dominant phases were goethite (α-FeO(OH)) and magnetite (Fe 3 O 4) whose presence explains a good preservation of the base metal, iron, over the centuries and the artefact stability after excavation. Besides goethite and magnetite, the corrosion products were identified to contain, to a lesser extent, less stable lepidocrocite (γ-FeO(OH)) and the phases that come from the rocks and soil from the surrounding environment (plagioclase). The phases containing chloride ions were not detected in the corrosion products (akaganéite, β-Fe 8 O 8 (OH) 8 Cl 1.35), which indirectly indicates that the content of chloride ions was not significant in the underground exploitation conditions. The lack of chloride ions also contributed to the corrosion stability of the artefact during the period after excavation.
One artefact of the archaeological cultural heritage from Roman period (IV century) that was foun... more One artefact of the archaeological cultural heritage from Roman period (IV century) that was found near Sabac in Serbia, was analysed. In corrosion products of the artefact (knife), dominant phases were goethite (α-FeOOH) and magnetite (Fe3O4). Presence of these types of corrosion products explains a good preservation of the base metal (iron) over the centuries and stability after excavation. Also, the less stable lepidocrocite (γ-FeOOH) and the phases that come from rocks and land surrounding environment (like SiO2) were identified in the corrosion products. Phases containing chloride ions (i.e. akaganeite) have not been detected in the corrosion products. This indirectly indicates that the amount chloride ions were rather low in underground exploitation conditions.
High-temperature materials are used in a wide range of industries and applications such as gas tu... more High-temperature materials are used in a wide range of industries and applications such as gas turbine engines for aircrafts, power and nuclear power plants, different types of furnaces, including blast furnaces, some fuel cells, industrial gas turbines, different types of reactors, engines, electronic and lighting devices, and many others. Demands for high-temperature materials are becoming more and more challenging every year. To perform efficiently, effectively and at the same time to be economically viable, the materials used at high temperatures must have certain characteristics that are particularly expected for applying under such extreme conditions, for example, the strength and thermal resistance. In the present review, some important requirements that should be satisfied by high temperature materials will be discussed. Furthermore, the focus is put on refractory concretes, ceramics, intermetallic alloys, and composites as four different categories of these materials, which...
When the testing of large quantities of bimetallic joints of aluminium (Al) and copper (Cu) is co... more When the testing of large quantities of bimetallic joints of aluminium (Al) and copper (Cu) is considered, consumption of Cu, as a raw material, is of significant importance. For tensile testing of Al/Cu joints, it is recommended to produce joints by using a longer initial length of Cu bars, whereas for the examination of micro-structure or other properties of these joints, Cu bars of shorter lengths can be used. In order to introduce the lower consumption of Cu for the testing of larger quantities of Al/Cu joints, it is necessary to determine whether the usage of different initial lengths of Cu bars produces the same micro-structural effects in joints obtained by using the same processing parameters or not. In this study, micro-structures and micro-hardness profiles of Al/Cu bimetallic joints produced by using continuous drive friction welding and noticeably different initial length of Cu bars will be analyzed. Also, mentioned properties of these joints in the open-die forged condi...
The paper describes structural changes in the welded joints, leading to the emergence of intergra... more The paper describes structural changes in the welded joints, leading to the emergence of intergranular corrosion (IGC) during exploitation. The occurrence of intergranular corrosion in welded joints of austenitic, ferritic and duplex stainless steels and in welded joints of aluminium alloys and nickel alloys is analysed. Special attention was paid to austenitic stainless steels, due to their wide application in practice. In addition to sensitization in the weld heataffected zone (HAZ), which results in degradation of the welded joint (“weld decay”), also considered is the sensitization that occurs close to the weld metal in the stabilized steel, which leads to a “knife line attack”. Considerable attention is devoted to describing the various procedures in order to prevent the sensitization of the welded joints. Kljucne reci • metali i legure • zavareni spoj • interkristalna korozija • senzibilizacija Izvod
The paper outlines the corrosion processes occurring in different types of iron artefacts of weap... more The paper outlines the corrosion processes occurring in different types of iron artefacts of weaponry and military equipment while buried and after excavation. Special attention was given to the description of the nature and the composition of corrosion products on the surface of iron artefacts, which provided their protection over thousands of years. The corrosion processes occurring after the excavation can cause a rapid deterioration of these objects in relatively mild conditions. Being particularly dangerous for archaeological iron weapons and military equipment, these processes are dealt with here in detail.
A spearhead of archaeological and cultural significance has been found and analysed in Serbia. In... more A spearhead of archaeological and cultural significance has been found and analysed in Serbia. In the corrosion products of the artefact, the dominant phases were goethite (αFeO(OH)) and magnetite (Fe3O4) whose presence explains a good preservation of the base metal, iron, over the centuries and the artefact stability after excavation. Besides goethite and magnetite, the corrosion products were identified to contain, to a lesser extent, less stable lepidocrocite (γ-FeO(OH)) and the phases that come from the rocks and soil from the surrounding environment (plagioclase). The phases containing chloride ions were not detected in the corrosion products (akaganéite, β-Fe8O8(OH)8Cl1.35), which indirectly indicates that the content of chloride ions was not significant in the underground exploitation conditions. The lack of chloride ions also contributed to the corrosion stability of the artefact during the period after excavation.
Test methods of stress corrosion cracking (SCC) of metals and alloys and their welded joints were... more Test methods of stress corrosion cracking (SCC) of metals and alloys and their welded joints were discussed in this paper. Principles of the methods, procedures, application areas and the advantages and disadvantages of the methods were described. Typical results obtained by their application were shown schematically. Special attention was devoted to SCC tests of the of the welded joints. Classical test methods of statically loaded smooth specimens (C-rings, bend-beam SCC samples, etc.), as well as modern methods such as slow strain rate test (SSRT) and methods based on the fracture mechanics (FM) principles have been described. Appropriate standards for SCC testing (ISO and ASTM) were listed, as well as some recommendations for preventing SCC of welded joints of different metals and alloys.
This paper analyzes the state of the French Cannon 75/27 model 1911. Deport made of steel. The am... more This paper analyzes the state of the French Cannon 75/27 model 1911. Deport made of steel. The amount of non-corroded materials, the presence of cracks and other defects in the cannon were determined by the radiographic method. The composition of corrosion products were analyzed using diffraction of X-rays (XRD method). In addition to goethite α-FeO(OH), lepidocrocite γ-FeO(OH) and magnetite Fe3O4, the presence of akaganeite was observed in the corrosion products, β-Fe8O8(OH)8Cl1.35 which indicates the accelerated corrosion of the base metal. With the ion chromatography method, the content of chloride, sulphate and other ions in corrosion products were examined. On the basis of conducted experiments, it can be concluded that it is necessary to treat the cannon in appropriate solutions, as quickly as possible, to remove chloride and sulphate ions.
PURPOSE Immature teeth are characterized by short roots, thin root canal walls, and open apices, ... more PURPOSE Immature teeth are characterized by short roots, thin root canal walls, and open apices, which makes them prone to fracture. The aim was to investigate whether fiber-post placement had an influence on the fracture resistance of endodontically treated immature teeth. MATERIALS AND METHODS To simulate immature teeth, the apical third of 20 intact mandibular premolars was resected. After the access cavity was prepared, root canals and apices were enlarged. A 4-mm apical barrier was placed using calcium-silicate based material (Biodentine, Septodont). The teeth were then randomly assigned to two groups (n = 10). Root canals in group 1 were sealed using Acroseal (Septodont, France) and gutta-percha, followed by composite resin for the coronal restoration (Evetric, Ivoclar Vivadent). In group 2, fiber posts (FRC Postec Plus, Ivoclar Vivadent) were luted using self-adhesive composite cement (SpeedCEM Plus, Ivoclar Vivadent), followed by the same coronal restoration. The teeth were ...
The occurrence of abnormal grain growth (AGG) in AA5182 alloy during annealing imposes severe res... more The occurrence of abnormal grain growth (AGG) in AA5182 alloy during annealing imposes severe restrictions on processing parameters and deteriorates mechanical properties. In this work, we investigated the effect of chemical composition on the appearance of abnormal grain growth by varying Mg and Mn content in the range of composition limits for standard AA5182 alloy, 4.0-5.0% Mg, and 0.2-0.5% Mn, respectively. Thermo-mechanical processing of alloys included cold rolling with reductions ranging from 40 to 85%, followed by annealing in the temperature range from 350 to 520 °C. The results showed that the rise in alloying elements content drives the onset of abnormal grain growth toward higher temperatures. The increase in the cold rolling reduction degree promotes abnormal grain growth and lowers its onset temperature. Abnormal grain growth and grain boundary mobility showed strong anisotropy related to rod-like shape and alignment of Al6Mn(Fe) dispersoids through Zener pinning.
Page 1. 1 STRUČNI RAD Primena elektrohemijskih metoda za ispitivanje interkristalne korozije zava... more Page 1. 1 STRUČNI RAD Primena elektrohemijskih metoda za ispitivanje interkristalne korozije zavarenog spoja austenitnog nerĎajućeg čelika 19Cr-9Ni Bore V. Jegdić 1 , Ana B. Alil 1 , Zlatan R. Milutinović 1 , Zoran D. Odanović 2 , Bojan R. Gligorijević 1 , Boris T. Katavić 1 ...
In this study, fully annealed AA5083 type alloy sheets with 1 mm in thickness were processed by a... more In this study, fully annealed AA5083 type alloy sheets with 1 mm in thickness were processed by accumulative roll bonding (ARB) at room temperature, up to 6 ARB cycles. It was found that microstructure was refined and mechanical properties were significantly improved with ARB processing. The maximum achieved values of hardness and tensile strength were two and three times greater than that of the initial material, respectively. This was attributed to the intensive strain hardening and grain size refinement which occurred during ARB deformation. However, the uniform elongation values were decreased by increasing the number of ARB cycles, and early fracture was registered. SEM fractography of fractured surfaces after tensile tests revealed a typical ductile fracture of ARB processed specimens, which was changed with ARB deformation. It was observed that ductile area on the fractured surfaces and the amount of necking, which occured before fracture, were decreased with increasing the n...
ABSTRACT The effect of different thermo-mechanical processing parameters on the baking response, ... more ABSTRACT The effect of different thermo-mechanical processing parameters on the baking response, and intergranular corrosion (IGC) resistance of an Al-4.6 wt% Mg-0.54 wt% Cu alloy was investigated. It has been shown that the high temperature anneal at 530 °C resulted in superior baking response of pre-deformed material after short annealing at 140-180 °C, compared to the annealing at 280 °C. Specimens pre-deformed 2% had positive baking response for both initial annealing temperatures, however, pre-deformation of 5% induced softening during the baking treatment of the specimens annealed at 280 °C. Prior to sensitization of 7 days at 100 °C, specimens at all stages of thermo-mechanical treatment were IGC resistant. After the sensitization specimens that underwent annealing at 530 °C remained IGC resistant, but specimens that underwent annealing at 280 °C became IGC susceptible. Better corrosion properties and baking response are related to the higher Cu content in solid solution after annealing at 530 °C than at 280 °C.
This paper analysis the causes dynamically loaded screws failure, using the structural analysis o... more This paper analysis the causes dynamically loaded screws failure, using the structural analysis of mechanical properties and numerical simulation. The comparison with the new unbroken screws, which were not in use, has been done to determine the condition of the broken (dynamically loaded) ones. Analysis was performed, according to the following test methods and activities: non-destructive testing, visual inspection, radiographic testing, chemical analysis of screws sample materials, mechanical properties of screws' materials. Structure analysis of screws materials: Testing macrostructure (light optical microscope, SEM-EDS) examination of the microstructure (light optical microscope, SEM-EDS), fractographic examination. Numerical simulation of the stress state of the dynamically loaded screws was done in CATIA software package, and it was identical to the bolt loads, during service exploitation. The results between numerical simulation and structural analysis were quite coincidi...
Sensitization degree of the austenitic stainless steel welded joints was investigated by electroc... more Sensitization degree of the austenitic stainless steel welded joints was investigated by electrochemical methods of the double loop electrochemical potentiokinetic reactivation (DL EPR) in H2SO4 + KSCN solution, and by the measurement of corrosion potential of the steel in the drop of the solution of HNO3 + FeCl3 + HCl. The welded joints were tested by X-ray radiographic method in order to check the presence of the weld defects. Grain size of the base metal and the welded joints were determined by optical microscopy. Good agreement between the results obtained by different electrochemical methods was obtained. Heat-affected zone (HAZ) of the austenitic stainless steel welded joints has shown significant degree of sensitization. The double loop electrochemical potentiokinetic method gave quantitative evidence about susceptibility of the stainless steel to intergranular corrosion.
A spearhead of archaeological and cultural significance has been found and analysed in Serbia. In... more A spearhead of archaeological and cultural significance has been found and analysed in Serbia. In the corrosion products of the artefact, the dominant phases were goethite (α-FeO(OH)) and magnetite (Fe 3 O 4) whose presence explains a good preservation of the base metal, iron, over the centuries and the artefact stability after excavation. Besides goethite and magnetite, the corrosion products were identified to contain, to a lesser extent, less stable lepidocrocite (γ-FeO(OH)) and the phases that come from the rocks and soil from the surrounding environment (plagioclase). The phases containing chloride ions were not detected in the corrosion products (akaganéite, β-Fe 8 O 8 (OH) 8 Cl 1.35), which indirectly indicates that the content of chloride ions was not significant in the underground exploitation conditions. The lack of chloride ions also contributed to the corrosion stability of the artefact during the period after excavation.
One artefact of the archaeological cultural heritage from Roman period (IV century) that was foun... more One artefact of the archaeological cultural heritage from Roman period (IV century) that was found near Sabac in Serbia, was analysed. In corrosion products of the artefact (knife), dominant phases were goethite (α-FeOOH) and magnetite (Fe3O4). Presence of these types of corrosion products explains a good preservation of the base metal (iron) over the centuries and stability after excavation. Also, the less stable lepidocrocite (γ-FeOOH) and the phases that come from rocks and land surrounding environment (like SiO2) were identified in the corrosion products. Phases containing chloride ions (i.e. akaganeite) have not been detected in the corrosion products. This indirectly indicates that the amount chloride ions were rather low in underground exploitation conditions.
High-temperature materials are used in a wide range of industries and applications such as gas tu... more High-temperature materials are used in a wide range of industries and applications such as gas turbine engines for aircrafts, power and nuclear power plants, different types of furnaces, including blast furnaces, some fuel cells, industrial gas turbines, different types of reactors, engines, electronic and lighting devices, and many others. Demands for high-temperature materials are becoming more and more challenging every year. To perform efficiently, effectively and at the same time to be economically viable, the materials used at high temperatures must have certain characteristics that are particularly expected for applying under such extreme conditions, for example, the strength and thermal resistance. In the present review, some important requirements that should be satisfied by high temperature materials will be discussed. Furthermore, the focus is put on refractory concretes, ceramics, intermetallic alloys, and composites as four different categories of these materials, which...
When the testing of large quantities of bimetallic joints of aluminium (Al) and copper (Cu) is co... more When the testing of large quantities of bimetallic joints of aluminium (Al) and copper (Cu) is considered, consumption of Cu, as a raw material, is of significant importance. For tensile testing of Al/Cu joints, it is recommended to produce joints by using a longer initial length of Cu bars, whereas for the examination of micro-structure or other properties of these joints, Cu bars of shorter lengths can be used. In order to introduce the lower consumption of Cu for the testing of larger quantities of Al/Cu joints, it is necessary to determine whether the usage of different initial lengths of Cu bars produces the same micro-structural effects in joints obtained by using the same processing parameters or not. In this study, micro-structures and micro-hardness profiles of Al/Cu bimetallic joints produced by using continuous drive friction welding and noticeably different initial length of Cu bars will be analyzed. Also, mentioned properties of these joints in the open-die forged condi...
The paper describes structural changes in the welded joints, leading to the emergence of intergra... more The paper describes structural changes in the welded joints, leading to the emergence of intergranular corrosion (IGC) during exploitation. The occurrence of intergranular corrosion in welded joints of austenitic, ferritic and duplex stainless steels and in welded joints of aluminium alloys and nickel alloys is analysed. Special attention was paid to austenitic stainless steels, due to their wide application in practice. In addition to sensitization in the weld heataffected zone (HAZ), which results in degradation of the welded joint (“weld decay”), also considered is the sensitization that occurs close to the weld metal in the stabilized steel, which leads to a “knife line attack”. Considerable attention is devoted to describing the various procedures in order to prevent the sensitization of the welded joints. Kljucne reci • metali i legure • zavareni spoj • interkristalna korozija • senzibilizacija Izvod
The paper outlines the corrosion processes occurring in different types of iron artefacts of weap... more The paper outlines the corrosion processes occurring in different types of iron artefacts of weaponry and military equipment while buried and after excavation. Special attention was given to the description of the nature and the composition of corrosion products on the surface of iron artefacts, which provided their protection over thousands of years. The corrosion processes occurring after the excavation can cause a rapid deterioration of these objects in relatively mild conditions. Being particularly dangerous for archaeological iron weapons and military equipment, these processes are dealt with here in detail.
A spearhead of archaeological and cultural significance has been found and analysed in Serbia. In... more A spearhead of archaeological and cultural significance has been found and analysed in Serbia. In the corrosion products of the artefact, the dominant phases were goethite (αFeO(OH)) and magnetite (Fe3O4) whose presence explains a good preservation of the base metal, iron, over the centuries and the artefact stability after excavation. Besides goethite and magnetite, the corrosion products were identified to contain, to a lesser extent, less stable lepidocrocite (γ-FeO(OH)) and the phases that come from the rocks and soil from the surrounding environment (plagioclase). The phases containing chloride ions were not detected in the corrosion products (akaganéite, β-Fe8O8(OH)8Cl1.35), which indirectly indicates that the content of chloride ions was not significant in the underground exploitation conditions. The lack of chloride ions also contributed to the corrosion stability of the artefact during the period after excavation.
Test methods of stress corrosion cracking (SCC) of metals and alloys and their welded joints were... more Test methods of stress corrosion cracking (SCC) of metals and alloys and their welded joints were discussed in this paper. Principles of the methods, procedures, application areas and the advantages and disadvantages of the methods were described. Typical results obtained by their application were shown schematically. Special attention was devoted to SCC tests of the of the welded joints. Classical test methods of statically loaded smooth specimens (C-rings, bend-beam SCC samples, etc.), as well as modern methods such as slow strain rate test (SSRT) and methods based on the fracture mechanics (FM) principles have been described. Appropriate standards for SCC testing (ISO and ASTM) were listed, as well as some recommendations for preventing SCC of welded joints of different metals and alloys.
This paper analyzes the state of the French Cannon 75/27 model 1911. Deport made of steel. The am... more This paper analyzes the state of the French Cannon 75/27 model 1911. Deport made of steel. The amount of non-corroded materials, the presence of cracks and other defects in the cannon were determined by the radiographic method. The composition of corrosion products were analyzed using diffraction of X-rays (XRD method). In addition to goethite α-FeO(OH), lepidocrocite γ-FeO(OH) and magnetite Fe3O4, the presence of akaganeite was observed in the corrosion products, β-Fe8O8(OH)8Cl1.35 which indicates the accelerated corrosion of the base metal. With the ion chromatography method, the content of chloride, sulphate and other ions in corrosion products were examined. On the basis of conducted experiments, it can be concluded that it is necessary to treat the cannon in appropriate solutions, as quickly as possible, to remove chloride and sulphate ions.
PURPOSE Immature teeth are characterized by short roots, thin root canal walls, and open apices, ... more PURPOSE Immature teeth are characterized by short roots, thin root canal walls, and open apices, which makes them prone to fracture. The aim was to investigate whether fiber-post placement had an influence on the fracture resistance of endodontically treated immature teeth. MATERIALS AND METHODS To simulate immature teeth, the apical third of 20 intact mandibular premolars was resected. After the access cavity was prepared, root canals and apices were enlarged. A 4-mm apical barrier was placed using calcium-silicate based material (Biodentine, Septodont). The teeth were then randomly assigned to two groups (n = 10). Root canals in group 1 were sealed using Acroseal (Septodont, France) and gutta-percha, followed by composite resin for the coronal restoration (Evetric, Ivoclar Vivadent). In group 2, fiber posts (FRC Postec Plus, Ivoclar Vivadent) were luted using self-adhesive composite cement (SpeedCEM Plus, Ivoclar Vivadent), followed by the same coronal restoration. The teeth were ...
The occurrence of abnormal grain growth (AGG) in AA5182 alloy during annealing imposes severe res... more The occurrence of abnormal grain growth (AGG) in AA5182 alloy during annealing imposes severe restrictions on processing parameters and deteriorates mechanical properties. In this work, we investigated the effect of chemical composition on the appearance of abnormal grain growth by varying Mg and Mn content in the range of composition limits for standard AA5182 alloy, 4.0-5.0% Mg, and 0.2-0.5% Mn, respectively. Thermo-mechanical processing of alloys included cold rolling with reductions ranging from 40 to 85%, followed by annealing in the temperature range from 350 to 520 °C. The results showed that the rise in alloying elements content drives the onset of abnormal grain growth toward higher temperatures. The increase in the cold rolling reduction degree promotes abnormal grain growth and lowers its onset temperature. Abnormal grain growth and grain boundary mobility showed strong anisotropy related to rod-like shape and alignment of Al6Mn(Fe) dispersoids through Zener pinning.
Uploads