I have a BSc in Refrigeration and Air-Condition Engineering on 2014 and have master degree at Applied Mechanics in Erbil Polytechnic University/ Erbil Technical Engineering College/ Department of engineering mechanics and energy
In the present work, similar joint of AISI 304 austenitic stainless steel with a designed joint i... more In the present work, similar joint of AISI 304 austenitic stainless steel with a designed joint interface by 6 mm diameter and 6 mm depth, were processed by rotary friction welding route. Different parameters including forging pressure (192.4, 240.5, 288.6 and 384.8 MPa), friction pressure (192.4 MPa), frictional speed (560 RPM) and frictional time (1min) are examined. Pin on disc wear tester was used for wear test with counter disc SAF 2205 duplex stainless steel and cylindrical AISI 304 pin specimens. The surface roughness of duplex stainless-steel disc was measured. The wear rate in terms of weight loss were obtained for the pin specimens. The results of designed joint interface specimens showed better wear resistance than as-received. The variation of increasing wear loss with sliding distance has been found to be uniform for all the specimens. Further, it was noted from the experiments that the wear rate increased with increasing forging pressure.
In this study, a rotary friction welding technique was used to join austenitic stainless-steel gr... more In this study, a rotary friction welding technique was used to join austenitic stainless-steel grade AISI 304. The effect of different forging pressure (192.4, 240.5, 288.6 and 384.8 MPa) on wear resistance of AISI 304 were examined using a modified pin on disc tester. The microstructure of the AISI 304 was examined as well using an optical microscope. The wear resistance results of the welded specimens were reported better than as received. The variation of increasing wear loss was uniformly changed with sliding distance. Further, it was noted from the experiments that the wear rate increased with increasing forging pressure in which the minimum wear rate was 3 mm 3 at 192.4 MPa while a maximum wear rate (25.823 mm 3) occurs at a forging pressure of 384.8 MPa. This is due to the microstructure changes which is decreasing grain size and formation of twin grains and also precipitating carbides.
In the present work, similar joint of AISI 304 austenitic stainless steel with a designed joint i... more In the present work, similar joint of AISI 304 austenitic stainless steel with a designed joint interface by 6 mm diameter and 6 mm depth, were processed by rotary friction welding route. Different parameters including forging pressure (192.4, 240.5, 288.6 and 384.8 MPa), friction pressure (192.4 MPa), frictional speed (560 RPM) and frictional time (1min) are examined. Pin on disc wear tester was used for wear test with counter disc SAF 2205 duplex stainless steel and cylindrical AISI 304 pin specimens. The surface roughness of duplex stainless-steel disc was measured. The wear rate in terms of weight loss were obtained for the pin specimens. The results of designed joint interface specimens showed better wear resistance than as-received. The variation of increasing wear loss with sliding distance has been found to be uniform for all the specimens. Further, it was noted from the experiments that the wear rate increased with increasing forging pressure.
Academic Journal of Nawroz University (AJNU), 2018
In this study that spur gears are chosen, contact stress of spur gear is presented under the effe... more In this study that spur gears are chosen, contact stress of spur gear is presented under the effect of rotational speed. Three-dimensional simulation of dynamic analysis of gears designed and modeled using ANSYS software. The dynamic analysis included in the determination of dynamic stresses analysis. Contact stress is theoretically calculated and analyzed and numerically estimated using both Hertzian mathematical model and finite element method respectively. Different values of rotational speed used to study its effect on contact stress. Both methods compared by evaluating the percentage error of contact stress, and the modeling of the spur gear and stress analysis of spur gear carried out using SOLID WORK and ANSYS V14, respectively. The most significant note in this study concludes that increasing speed causes vibration and pitting failure due to repetitions.
In the present work, similar joint of AISI 304 austenitic stainless steel with a designed joint i... more In the present work, similar joint of AISI 304 austenitic stainless steel with a designed joint interface by 6 mm diameter and 6 mm depth, were processed by rotary friction welding route. Different parameters including forging pressure (192.4, 240.5, 288.6 and 384.8 MPa), friction pressure (192.4 MPa), frictional speed (560 RPM) and frictional time (1min) are examined. Pin on disc wear tester was used for wear test with counter disc SAF 2205 duplex stainless steel and cylindrical AISI 304 pin specimens. The surface roughness of duplex stainless-steel disc was measured. The wear rate in terms of weight loss were obtained for the pin specimens. The results of designed joint interface specimens showed better wear resistance than as-received. The variation of increasing wear loss with sliding distance has been found to be uniform for all the specimens. Further, it was noted from the experiments that the wear rate increased with increasing forging pressure.
In this study, a rotary friction welding technique was used to join austenitic stainless-steel gr... more In this study, a rotary friction welding technique was used to join austenitic stainless-steel grade AISI 304. The effect of different forging pressure (192.4, 240.5, 288.6 and 384.8 MPa) on wear resistance of AISI 304 were examined using a modified pin on disc tester. The microstructure of the AISI 304 was examined as well using an optical microscope. The wear resistance results of the welded specimens were reported better than as received. The variation of increasing wear loss was uniformly changed with sliding distance. Further, it was noted from the experiments that the wear rate increased with increasing forging pressure in which the minimum wear rate was 3 mm 3 at 192.4 MPa while a maximum wear rate (25.823 mm 3) occurs at a forging pressure of 384.8 MPa. This is due to the microstructure changes which is decreasing grain size and formation of twin grains and also precipitating carbides.
In the present work, similar joint of AISI 304 austenitic stainless steel with a designed joint i... more In the present work, similar joint of AISI 304 austenitic stainless steel with a designed joint interface by 6 mm diameter and 6 mm depth, were processed by rotary friction welding route. Different parameters including forging pressure (192.4, 240.5, 288.6 and 384.8 MPa), friction pressure (192.4 MPa), frictional speed (560 RPM) and frictional time (1min) are examined. Pin on disc wear tester was used for wear test with counter disc SAF 2205 duplex stainless steel and cylindrical AISI 304 pin specimens. The surface roughness of duplex stainless-steel disc was measured. The wear rate in terms of weight loss were obtained for the pin specimens. The results of designed joint interface specimens showed better wear resistance than as-received. The variation of increasing wear loss with sliding distance has been found to be uniform for all the specimens. Further, it was noted from the experiments that the wear rate increased with increasing forging pressure.
Academic Journal of Nawroz University (AJNU), 2018
In this study that spur gears are chosen, contact stress of spur gear is presented under the effe... more In this study that spur gears are chosen, contact stress of spur gear is presented under the effect of rotational speed. Three-dimensional simulation of dynamic analysis of gears designed and modeled using ANSYS software. The dynamic analysis included in the determination of dynamic stresses analysis. Contact stress is theoretically calculated and analyzed and numerically estimated using both Hertzian mathematical model and finite element method respectively. Different values of rotational speed used to study its effect on contact stress. Both methods compared by evaluating the percentage error of contact stress, and the modeling of the spur gear and stress analysis of spur gear carried out using SOLID WORK and ANSYS V14, respectively. The most significant note in this study concludes that increasing speed causes vibration and pitting failure due to repetitions.
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