Resistance spot welding of Ti_(40)Zr_(25)Ni_3Cu_(12)Be_(20) bulk metallic glass:experiments and finite element modeling  

作　　者：Gang Wang Yong-Jiang Huang Deodat Makhanlall Jun Shen 

机构地区：[1]School of Mechanical and Automotive Engineering,Anhui Polytechnic University [2]School of Materials Science and Engineering,Harbin Institute of Technology

出　　处：《Rare Metals》2017年第2期123-128,共6页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No.50904021);the Naural Science Foundation of the Education Department of Anhui Province (No.KJ2014A023);the Scientific Research Starting Foundation of Anhui Polytechnic University (No.2012YQQ006)

摘　　要：The use of resistance spot welding（RSW）technology for joining Ti40Zr25Ni3Cu12Be20 metallic glass was investigated.The microstructure obtained from the welded BMG sample was studied.Joint without precipitates was prepared with welding current of 5.0 kA for 2cycles.A fully coupled thermal-electrical-mechanical finite element model（FEM） was developed to complement the experimental study.The simulated results agree well with the measurements.The effects of key process parameters such as welding current and welding time on the evolvement and microstructure of the weldment were determined and discussed.Moreover,the critical cooling rate for preserving the amorphous state in the weld fusion zone is determined to be approximately 1×10^3 K·s^-1.The use of resistance spot welding（RSW）technology for joining Ti40Zr25Ni3Cu12Be20 metallic glass was investigated.The microstructure obtained from the welded BMG sample was studied.Joint without precipitates was prepared with welding current of 5.0 kA for 2cycles.A fully coupled thermal-electrical-mechanical finite element model（FEM） was developed to complement the experimental study.The simulated results agree well with the measurements.The effects of key process parameters such as welding current and welding time on the evolvement and microstructure of the weldment were determined and discussed.Moreover,the critical cooling rate for preserving the amorphous state in the weld fusion zone is determined to be approximately 1×10^3 K·s^-1.

关 键 词：Metallic glasses Simulations Resistance spot welding Cooling rate 

分 类 号：TG139.8[一般工业技术—材料科学与工程] TG453.9[金属学及工艺—合金]