Microstructure and Texture of High Strength Aluminum Alloy Ultrasonic Welding Layer after Ultrasonic Deep Rolling

作者：Xie Junfeng^*; Zhu Youli; Huang Yuanlin; Zhao Qian; Bian Feilong

来源：Rare Metal Materials and Engineering, 2014, 43(12): 3058-3062.

• ultrasonic welding
• ultrasonic deep rolling
• surface roughness
• recrystallization texture

2A12-T3 and 2A11-O aluminum alloy were welded by ultrasonic welding (USW), and then ultrasonic deep rolling (UDR) treating was performed on the welded layer. Macromorphology and microstructure of the USW layers before and after UDR were investigated by scanning electron microscope (SEM), electron backscatter diffraction (EBSD) and transmission electron microscope (TEM). Results show that UDR can eliminate the surface welded indents, decrease surface roughness and make microstructure more homogenous at the welded interface. Recrystallization occurs in the USW layer after UDR to form recrystallization texture and strain-induced grain growth, which could reduce welding residual stress at the welded interface. Therefore, UDR is favorable to improve microstructure and properties of the USW layer.

• 出版日期2014-12
• 单位中国人民解放军装甲兵工程学院; 中国人民解放军63961部队