Microstructure,mechanical properties and post-weld heat treatments of dissimilar laser-welded Ti_(2)AlNb/Ti60 sheet

作     者：Yong Wu Gang Liu Zhi-Qiang Liu Ze-Jun Tang Bin Wang Yong Wu;Gang Liu;Zhi-Qiang Liu;Ze-Jun Tang;Bin Wang

作者机构：State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin150001China School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin150001China College of Mechanical and Electrical EngineeringNanjing University of Aeronautics and AstronauticsNanjing211106China Beijing Xinghang Mechanical-Electrical Equipment Co.Ltd.Beijing100074China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2023年第42卷第4期

页      面：1332-1342页

核心收录：

学科分类：080503[工学-材料加工工程] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 082503[工学-航空宇航制造工程] 080502[工学-材料学] 0703[理学-化学] 0802[工学-机械工程] 0825[工学-航空宇航科学与技术] 0702[理学-物理学] 080201[工学-机械制造及其自动化] 

基　　金：financially supported by the National High-level Personnel of Special Support Program(No.W02020239) 

主　　题：Ti_(2)AlNb Laser beam welding Post-weld heat treatment Mechanical properties Dissimilar welding 

摘      要：Dissimilar joining of Ti_(2)AlNb and Ti60 rolled sheet was performed by laser beam *** microstructures and mechanical properties of as-welded and post-weld heat-treated Ti_(2)AlNb/Ti60 joints were investigated by microstructure observation and mechanical properties *** fusion zone(FZ)of the as-welded joint consisted of B_(2)/βmatrix and small S2 *** heataffected zones HAZ-Ti_(2)AINb and HAZ-Ti60 for the aswelded joint were characterized asα_(2)+B_(2)/β+O andα +α+β+S_(2),*** tensile strength and elongation of as-welded sheet were 597.5 MPa and 6.2%at650℃,*** of the plastic deformation was taken place at the side of Ti60 *** the increase in the heat treatment temperature,the anchoring strength between each other of B_(2)/βgrains was enhanced by the precipitated lamellarα and O grains at the *** depth of the fracture dimples increased with the heat treat temperature *** heat-treated welding joint at970℃presented a good balance of the tensile strength and plasticity,where the tensile strength and the elongation were enhanced to 669.7 MPa and 7.1%at 650℃,respectively.