文献类型：期刊文献

英文题名：Reliable joining Al5(TiZrHfNb)95 multicomponent alloy and Nb using Ti-Ni filler metal

作者：Tian, Fuqiang[1];Shi, Junmiao[1];Peng, Xuan[2];Li, Jinglong[2];Zhang, Xiancheng[1]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]Northwestern Polytech Univ, Shaanxi Key Lab Frict Welding Technol, Xian 710072, Peoples R China

年份：2022

卷号：201

外文期刊名：VACUUM

收录：;EI(收录号：20221812054934);WOS:【SCI-EXPANDED(收录号:WOS:000796703900003)】；

基金：Acknowledgments This study was supported by the National Natural Science Founda-tions of China (No. 52005410) , Natural Science Basic Research Program of Shaanxi (Program No. 2020JQ-190) and the China Postdoctoral Sci-ence Foundation (No. 2019TQ0263, No. 2020M683560) .

语种：英文

外文关键词：Al-5(TiZrHfNb)(95); Multicomponent alloy; Braze; Microstructure; Shear strength

摘要：The reliable joining of Al-5(TiZrHfNb)(95) multicomponent alloy and Nb was achieved by the reaction of Ti-Ni filler and base materials. The relation of the microstructure evolution and brazing temperature was analyzed to reveal the brazing mechanism. The joint property was evaluated by the shear strength. The results showed that the liquid brazing filler reacted with Nb substrate to form a TiZrHfNb layer adjacent to the Nb, and the brazing seam was composed of TiZrHfNb matrix, (Ti,Zr,Hf)(2)Ni and (Hf,Zr,Ti)(2)Ni phases. Increasing the brazing temperature promoted the Al-5(TiZrHfNb)(95) to dissolve into the brazing filler, and the (Ti,Zr,Hf)2Ni and (Hf,Zr,Ti)(2)Ni phases volume enlarged. The (Ti,Zr,Hf)(2)Ni and (Hf,Zr,Ti)(2)Ni phases were beneficial to the property of the brazing seam. But high volume of (Ti,Zr,Hf)(2)Ni and (Hf,Zr,Ti)(2)Ni facilitated the propagation of cracks in the brazing seam, seriously weakening the joint shear strength. When the Al-5(TiZrHfNb)(95) and Nb were brazed at 1150 degrees C for 20 min, the maximum shear strength achieved at room temperature was 338 MPa, and the crack was located in the brazing seam.