Ultrasonic-assisted soldering W90 Tungsten heavy alloy to AZ31B Mg alloy using Sn-x Al alloy  

作　　者：Xudong Zhang Wei Fu Xiaoguo Song Liangbo Chen Zhuolin Li Shengpeng Hu Hong Bian 

机构地区：[1]State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin,150001,China [2]Shandong Provincial Key Laboratory of Special Welding Technology,Harbin Institute of Technology,Weihai,264209,China [3]Shandong Institute of Shipbuilding Technology,Weihai,264209,China

出　　处：《Journal of Materials Science & Technology》2024年第8期132-140,共9页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(nos.52105330 and 52175307);the Natural Science Foundation of Shandong Province(no.ZR2020QE175);the Taishan Scholars Foundation of Shandong Province(no.tsqn201812128).

摘　　要：A double-layered W/Mg structure is expected to be a new generation of nuclear radiation shielding material.The tungsten heavy alloy(W90)and AZ31B Mg alloy were firstly bonded by ultrasonic-assisted soldering using pure Sn and Sn-Al filler metal in an atmospheric environment.The influence of ultrasonication time on the microstructure and mechanical properties of the joint was investigated.The typical microstructure of the W90/Sn/Mg joint was W90/Mg_(2)Sn+Sn/Mg_(2)Sn layer/Mg.As the ultrasonication time increased from 2 s to 10 s,the joint width reduced and the thickness of the Mg_(2)Sn layer increased.The shear strength of the joint firstly increased,then flattened,and finally decreased.The joint strength reached the maximum value of 10.5 MPa.The fracture position of the joint changed from the W90/filler metal interface to the Mg_(2)Sn layer.The addition of Al in Sn resulted in the formation of the Al4 W phase at the W/Sn-1Al interface.The W/filler metal interface changed from the semi-coherent interface to the coherent interface and the joint strength increased.As the ultrasonication time was 6 s,the shear strength W90/Sn-1Al/Mg joint reached the maximum value of 24.6 MPa and the joint fractured at two positions:W90/filler metal interface and filler metal.With the further increase of ultrasonication time,the joint strength decreased and the joint fractured in the Mg_(2)Sn layer.

关 键 词：Tungsten heavy alloy Mg alloy Ultrasonic-assisted soldering Mg_(2)Sn Cavitation effect 

分 类 号：TG146.22[一般工业技术—材料科学与工程]