Influence of elastic tensile stress on aging process in an Al-Zn-Mg-Cu alloy

被引：38
作者：
Guo, Wei [1 ,2 ]
Yang, Meng [1 ,2 ]
Zheng, Yi [1 ,2 ]
Zhang, Xueshu [1 ,2 ]
Li, Hui [1 ,2 ]
Wen, Xiyu [3 ]
Zhang, Jingwu [1 ,2 ]
机构：
[1] Yanshan Univ, Coll Mat Sci & Engn, Qinhuangdao 066004, Peoples R China
[2] Yanshan Univ, State Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
[3] Univ Kentucky, Coll Engn, Ctr Aluminum Technol, Lexington, KY 40511 USA
来源：
MATERIALS LETTERS | 2013年 / 106卷
基金：
中国国家自然科学基金;
关键词：
Microstructure; Segregation; Precipitation; Stress aging; 7075 Al alloys; ALUMINUM-ALLOY; XCU ALLOYS; GP-ZONES; AG ALLOY; PRECIPITATION; NUCLEATION; GROWTH; THETA'; MICROSTRUCTURES;
D O I：
10.1016/j.matlet.2013.04.095
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of elastic tensile stress on the microstructure of 7075 Al alloy aged at 393-453 K for 1 h has been investigated in this paper. It was found that during the low temperature aging, the external stress lessens the size of the GPI zones. GPII.zones are just identified in the stress-free aged condition. A new edge-on eta' platelet is observed in the stress-aged specimen. During the high temperature aging, the external stress promotes the formation of MgZn2 precipitates without changing the type of it. The peak microhardness value of the stress-aged specimens reaches 180 HV. The aging period of this alloy is shortened using the stress aging treatment. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：14 / 17
页数：4
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