Microstructure evolution and formation mechanism of γ-TiAl/Ni-based superalloy laser-welded joint with Ti/V/Cu filler metals

被引：16
作者：
Cai, Xiaolong [1 ]
Li, Qiao [1 ]
Li, Hongmei [2 ]
Xu, Guangbin [1 ]
Yu, Haibo [1 ]
机构：
[1] Changchun Inst Technol, 395 Kuanping Rd, Changchun 130012, Peoples R China
[2] Jilin Univ, Dept Mat Sci & Engn, 5988 Renmin St, Changchun 130025, Peoples R China
来源：
MATERIALS LETTERS | 2023年 / 333卷
关键词：
Dissimilar welding; -TiAl alloy; Ni-based superalloy; Microstructure; Mechanical property;
D O I：
10.1016/j.matlet.2022.133647
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Laser welding of dissimilar gamma-TiAl alloy to Ni-based superalloy with Ti/V/Cu filler metals was applied and well formed joint was obtained. The weld zone consisted of AlNi2Ti, CuNiTi, (V,Cr) solid solution (ss) and (Cu,Ni)ss. The gamma-TiAl interface zone composed of AlCuTi and AlCu2Ti. The microstructure evolution and formation mechanism of the weld zone and gamma-TiAl interface zone were discussed in detail. Mechanical testing of the joints revealed that the average tensile strength was 170 MPa and the fractured joint passed through the weld zone and gamma-TiAl interface zone.
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页数：4
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