مقاله جوشکاری با عنوان : Ultrasonic spot welded AZ31 magnesium alloy: Microstructure, texture, and lap shear strengthV.K. Patel, S.D. Bhole n, D.L. Chenچکیده:The structural application of ultra-lightweight magnesium alloys inevitably involves welding andjoining. A solid-state welding – ultrasonic spot welding (USW) – was conducted on AZ31B-H24 Mgalloy sheet by varying a key parameter of welding energy in this study, aiming to identify the changesin the microstructure, crystallographic texture, and lap shear tensile strength. The grain size wasobserved to increase with increasing welding energy. Crystallographic texture determined via X-raydiffraction showed a significant change that corresponded well to the change in the deformation andrecrystallization mechanisms of the Mg alloy. The lap shear strength first increased with increasingenergy input, reached the maximum value at a welding energy of 2000 J, then decreased. The weldsgenerally fractured along the joint interface when the welding energy was lower than 2000 J, whilefracture occurred at the periphery of the joint (button pull-out) for the samples made with an energyinput of higher than 2000 J.
مقاله جوشکاری با عنوان : Ultrasonic spot welded AZ31 magnesium alloy: Microstructure, texture, and lap shear strengthV.K. Patel, S.D. Bhole n, D.L. Chenچکیده:The structural application of ultra-lightweight magnesium alloys inevitably involves welding andjoining. A solid-state welding – ultrasonic spot welding (USW) – was conducted on AZ31B-H24 Mgalloy sheet by varying a key parameter of welding energy in this study, aiming to identify the changesin the microstructure, crystallographic texture, and lap shear tensile strength. The grain size wasobserved to increase with increasing welding energy. Crystallographic texture determined via X-raydiffraction showed a significant change that corresponded well to the change in the deformation andrecrystallization mechanisms of the Mg alloy. The lap shear strength first increased with increasingenergy input, reached the maximum value at a welding energy of 2000 J, then decreased. The weldsgenerally fractured along the joint interface when the welding energy was lower than 2000 J, whilefracture occurred at the periphery of the joint (button pull-out) for the samples made with an energyinput of higher than 2000 J.