Microstructure and properties of dissimilar materials Ti/Cu welding joint by arc welding

被引：0
|
作者：
Li J. [1 ,2 ]
Zhou P. [1 ]
Hui Y.-Y. [1 ]
机构：
[1] School of Aeronautical Materials Engineering, Xi'an Aeronautical Polytechnic Institute, Xi'an
[2] State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2021年 / 31卷 / 09期
关键词：
Arc welding; Intermetallic compounds; Titanium-copper welding;
D O I：
10.11817/j.ysxb.1004.0609.2021-37856
中图分类号：
学科分类号：
摘要：
In order to promote the wide application of Ti/Cu dissimilar Metal welding structure, dissimilar metals of TA2 titanium and T2 copper were joined with butt joint by conventional argon tungsten-arc welding. The interfacial microstructures of the joints were analyzed by scanning electron microscopy(SEM), energy dispersive spectroscopy(EDS) and X-ray diffractometry(XRD). The results show that an intermetallic compound with a thickness of about 50μm forms in the interface reaction layer of Ti/Cu welding joint. The intermetallic compound layer is composed of CuTi, Cu2Ti and Cu4Ti3. The rod-like CuTi is near the titanium side, the massive and dendriticas Cu2Ti distribute in the intermediate region of the interfacial reaction, and Cu4Ti3 distributes along the edge of the dendrite compound Cu2Ti. The dissolution and diffusion of alloying element Ti to weld metal are very few, and the formation of interface reaction layer compound of Ti-Cu welding joint is dominated by liquid phase diffusion reaction. The tensile strength of the welding joint is up to 171 MPa, and the joint fractures in the intermetallic compound layer adjacent to the titanium base material, and the fracture is a typical brittle cleavage fracture. © 2021, China Science Publishing & Media Ltd. All right reserved.
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页码：2419 / 2426
页数：7
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