Interfacial microstructure and mechanical property of Ti60 and TC4 joint brazed with Cu75Pt filler metal

被引：0
|
作者：
Guo M. [1 ]
Lei Y. [2 ]
Zhao J. [1 ]
Song X. [2 ]
Yu Z. [1 ]
Shi M. [3 ]
机构：
[1] Shanghai University of Engineering Science, Shanghai
[2] Shandong Provincial Key Lab of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai
[3] Jiangsu University of Science and Technology, Zhenjiang
来源：
Hanjie Xuebao/Transactions of the China Welding Institution | 2022年 / 43卷 / 02期
关键词：
Brazing temperature; Interfacial microstructure; Mechanical properties; Vacuum brazing;
D O I：
10.12073/j.hjxb.20210918001
中图分类号：
学科分类号：
摘要：
The Ti60 titanium alloy was successfully vacuum brazed with TC4 titanium alloy by using Cu75Pt filler metal. The microstructure of brazed joints was analyzed by scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and X-ray diffraction (XRD). The results showed that the typical microstructure of Ti60/Cu75Pt/TC4 joint was Ti60/Ti2Cu + α-Ti/Ti2Cu/Ti2Cu + Ti3Pt/Ti2Cu/Ti2Cu + α-Ti/TC4. The effect of different brazing temperatures on the interfacial microstructure and mechanical properties of joints was studied. The results revealed that with the increasing of brazing temperature, the thicknesses of diffusion layers were increased gradually. However, the Ti2Cu, Ti3Pt and the width of brazing seams were decreased. The shear strength of the joint increased first and then decreased with the increase of brazing temperature. The maximum shear strength of 130.9 MPa was obtained at the brazing temperature of 970 ℃ for 10min. The fracture analysis of the joint showed that the fracture mode is brittle fracture, which occurred in the center of brazing seam. Copyright © 2022 Transactions of the China Welding Institution. All rights reserved.
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页码：40 / 44
页数：4
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