A novel friction stir diffusion bonding process using convex-vortex pin tools  

作　　者：S.D.Ji Q.Wen Z.W.Li 

机构地区：[1]College of Aerospace Engineering,Shenyang Aerospace University,Shenyang 110136,China [2]State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,China

出　　处：《Journal of Materials Science & Technology》2020年第13期23-30,共8页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51874201)。

摘　　要：In this work,a novel friction stir diffusion bonding(FSDB)method was proposed to eliminate hook when joining thin sheets.Three tools,with several convex-vortex pins were innovatively designed to improve the diffusion bonding effect of the lap interface.Results showed that sound joints,excellently bonded at the lap interface and without hook,were obtained.The lap interfaces on the joints welded using the T-tool and F-tool almost remained intact,thereby indicating that they were formed by diffusion bonding.The material flow behavior was also simulated by FLUENT software and the results showed that the material flow along thickness was significantly enhanced by increasing the pin number.The joint welded by the T-tool showed shear fracture mode.Sound bonding was formed at the lap interface when using the F-tool and thus the joint showed tensile fracture.

关 键 词：Friction stir diffusion bonding Convex-vortex pin Hook Material flow Failure 

分 类 号：TG453.9[金属学及工艺—焊接]