Microstructure and mechanical properties of TC4 joints brazed with Ti-Zr-Cu-Sn amorphous filler alloy

• 作者: Hui-Hui Zhang Zhen-Duo Cui Sheng-Li Zhu Shi-Wei Guo Xian-Jin Yang Akihisa Inoue
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（7）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 1881-1889
• 页数: 9页
• 语种: 英文

摘要

The Ti51.44Zr16.26Cu30Sn2.3(at％)amorphous filler alloy in a ribbon form was prepared by melt spinning.The Ti-6Al-4V alloy was brazed in vacuum furnace by using the Ti51.44Zr16.26Cu30Sn2.3 amorphous filler alloy.The effects of brazing temperature and holding time on the interfacial microstructure and mechanical properties of the Ti-6Al-4V brazed joints were investigated.The brazed joints are composed of α-Ti,β-Ti,and(Ti,Zr)2Cu phases.The shear strength of the joints increases with brazing temperature increasing from 1153 to 1193 K and holding time from 10 to 15 min,while decreases with brazing temperature and time further increasing.Low temperature brazing results in the formation of microcracks and voids in the seams,which are harmful for the shear strength of the joints.In the joint brazed at 1193 K for 15 min,a fineα+β Widmanst?tten structure beneficial to the mechani-cal property is formed,and the joint exhibits relatively high joint strength of 180 MPa.