Effect of aging temper on the thermal stability of Al-Cu-Mg-Ag heat-resistant alloy

被引：31

作者：

Liu, Xiao Yan ^{[1
,2
]}

Pan, Qing Lin ^{[1
]}

Zheng, Li Yun ^{[2
]}

Fu, Quan Rong ^{[2
]}

Gao, Fei ^{[2
]}

Li, Mei Xia ^{[2
]}

Bai, Yong Mei ^{[2
]}

机构：

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

[2] Hebei Univ Engn, Coll Equipment Mfg, Handan 056038, Peoples R China

来源：

MATERIALS & DESIGN | 2013年 / 46卷

关键词：

FATIGUE FRACTURE-BEHAVIOR; MICROSTRUCTURES; PRECIPITATION; PERFORMANCE; EVOLUTION; RATIO;

D O I：

10.1016/j.matdes.2012.10.039

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The thermal stability of Al-Cu-Mg-Ag alloy was tested by thermal exposure and creep performance. The results show that the under-aged Al-Cu-Mg-Ag alloy possessed better thermal stability compared to the peak-aged one, due to the secondary precipitations of the strengthening phases. The number of the precipitations in the under-aged sample increased and then decreased with increasing the thermal exposure or creep time while that of the peak-aged sample decreased gradually. The tensile strength of the under-aged sample increased and then decreased with increasing the thermal exposure time with a peak value of 524 MPa after exposed for 20 h, which was 19 MPa higher than that of the peak-aged alloy. The steady creep rate of the under-aged sample was much lower and the creep-life was much longer to that of the peak-aged one, indicating that the under-aged sample possessed excellent creep resistance property at elevated temperatures. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：360 / 365

页数：6

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