Improvement of high-temperature strength of Al-4.5Cu alloys by Sc addition through thermally stable phase

被引：0

作者：

Wei, Qi ^{[1
]}

Lian, Peng ^{[1
]}

Bai, Xiaoyu ^{[2
]}

Zhang, Dan ^{[1
]}

Mao, Hongkui ^{[1
]}

Xu, Hong ^{[1
]}

机构：

[1] North Univ China, Sch Mat Sci & Engn, Taiyuan 030051, Peoples R China

[2] North Automat Control Technol Inst, Taiyuan, Peoples R China

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2024年

关键词：

Al-Cu alloy; high-temperature properties; W phase; thermal stability; AL-CU ALLOYS; MECHANICAL-PROPERTIES; MICROSTRUCTURE EVOLUTION; AG ALLOY; ZR; ALUMINUM; TI; PRECIPITATION; STABILITY; BEHAVIOR;

D O I：

10.1177/02670836241299938

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure and high-temperature mechanical properties of Al-4.5Cu alloy, and alloys with Sc addition of 0.1%, 0.2%, and 0.4% were studied. The addition of Sc generates high-temperature stable phase - W phase along the grain boundary, which consumes Cu in the matrix and decrease the theta ' after T6 treatment. However, Sc stabilizes the theta ' precipitate during 300 degrees C exposure and contributes to the high temperature strength by Orowan mechanism. The high-temperature performance of Al-4.5Cu alloy is improved and the strength first increases and then decreases with increasing content of Sc, with optimal content of Sc being 0.2%. The tensile strength of 0.2%Sc alloy at 300 degrees C reaches 158 +/- 3 MPa, which is 28 +/- 3 MPa higher than that of Sc-free alloy.

引用

页数：11

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