Heat-resistant performance of an underaged Al-Cu-Mg-Ag alloy

被引：0

作者：

Xia Qingkun ^{[1
,2
]}

Liu Zhiyi ^{[1
]}

Li Yuntao ^{[1
]}

Liu Yanbin ^{[1
]}

Zhou Jie ^{[1
]}

Yu Richeng ^{[1
]}

机构：

[1] Cent S Univ, Sch Mat Sci, Changsha 410083, Peoples R China

[2] Changsha Univ, Changsha 410003, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2007年 / 36卷

关键词：

Al-Cu-Mg-Ag alloy; thermal exposure; high temperature lasting; microstructure; mechanical properties;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of thermal exposure and high temperature lasting on microstructure and mechanical properties of an underaged (165 degrees C, 2 h)Al-Cu-Mg-Ag-Zr alloy have been investigated, The results show that with prolonging of lasting time, the residual stress of underageing samples appears to be increase first but then decrease, and the peaking stress is obtained when lasting for 20 h. The variation. of ductility of the underageing samples has the same tendency with the variation of residual stress. Compared with underageing condition, the mechanical properties has no obvious variation after lasting for 100 h, which represents a superior heat-resistance ability. The fine and uniform distribution of Omega phase within the matrix grow and coarsen with prolonging of lasting time, and theta'competitive precipitate and precipitate-free zone (PFZ) width increase. Compared with the high temperature lasting condition, the variation of strength of the underageing samples in exposure 200 degrees C has the same tendency, and the ductility decreases with prolonging of exposure time.

引用

页码：608 / 611

页数：4