Arc additive remanufacturing of a new type of Al-Cu-Ni aviation case: microstructure and high-temperature properties under T6 heat treatment

被引：7
作者：
Dai, Hongbin [1 ,3 ]
Zhang, Enyu [1 ]
Miao, Jian [1 ]
Lin, Sanbao [2 ]
Yu, Song [1 ]
机构：
[1] Harbin Univ Sci & Technol, Sch Mat Sci & Engn, Harbin, Peoples R China
[2] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin, Peoples R China
[3] Harbin Univ Sci & Technol, Sch Mat Sci & Engn, Harbin 150040, Peoples R China
来源：
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2023年 / 28卷 / 06期
关键词：
Al-Cu-Ni heat-resistant alloy; arc additive remanufacturing; high-temperature properties; microstructure; ALUMINUM ALLOYS; MG CONTENT; CREEP;
D O I：
10.1080/13621718.2023.2183330
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new Al-Cu-Ni alloy was repaired by arc additive remanufacturing and T6 heat treatment. The results show that the grain size in the upper part of the weld is slightly larger than that in the lower part, and the whole distribution is uniform without delamination. The orientation of grains in the weld is disordered, and most of them are stable crystal structures with a large angle. The average tensile strength at 300 degrees C is 148.3 MPa, the yield strength is 106.6 MPa and the elongation is 10.5%. delta-Al3CuNi and gamma-Al7Cu4Ni increase the strength of grain boundary, and the strength of theta '' and theta ' are dispersed from the alpha-Al matrix during aging, which are the main reasons for obtaining high-temperature properties.
引用
收藏
页码：506 / 513
页数：8
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