Microstructure and high-temperature mechanical properties of new-type heat-resisting aluminum alloy Al6.5Cu2Ni0.5Zr0.3Ti0.25V under the T7 condition

被引：13

作者：

Dai, Hongbin ^{[1
]}

Wang, Lang ^{[1
]}

Dong, Bolun ^{[2
]}

Miao, Jian ^{[1
]}

Lin, Sanbao ^{[2
]}

Chen, Hongtao ^{[1
]}

机构：

[1] Harbin Univ Sci & Technol, Sch Mat Sci & Engn, Harbin 150040, Peoples R China

[2] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China

来源：

MATERIALS LETTERS | 2023年 / 332卷

关键词：

Cast heat -resistant aluminum alloy; High -temperature strength; Microstructure;

D O I：

10.1016/j.matlet.2022.133503

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Making use of the low-pressure sand mold casting preparation Al6.5Cu2Ni0.5Zr0.3Ti0.25V alloy. After T7 heat treatment, microstructure observation shows that the average grain size of the Al matrix is 150 mu m, and the second phase is theta'-Al2Cu, Al7Cu4Ni, Al3M (M = Ti, Zr, V). The tensile strength is 127.5 MPa, the yield strength is 108Mpa, and the elongation is 16.11 %. The theta'-Al2Cu phase in the grain, a small amount of Al3M (M = Ti, Zr, V) thermal stable phase, and the Al7Cu4Ni phase at the grain boundary make the alloy exhibit excellent high -temperature mechanical properties at 350 degrees C.

引用

页数：4

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