Effect of pre-strain and two-step aging on microstructure and stress corrosion cracking of 7050 alloy

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	Effect of pre-strain and two-step aging on microstructure and stress corrosion cracking of 7050 alloy
	D. Wang; D. R. Ni; Z. Y. Ma
	2008
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	494 期号:1-2 页码:360-366
摘要	A novel heat treatment procedure that combines the pre-strain with a two-step aging was proposed to improve both the strength and stress corrosion cracking (SCC) resistance of the high strength 7050 aluminum alloy. The heat treatment included a post-quenching pre-strain of 5%, a high-temperature aging at 200 degrees C for several minutes, and a subsequent low-temperature aging at 120 degrees C for 24h. The yield strength of the samples aged at 200 degrees C for 0.5 and 1 min was higher than that of the T6 sample. The SCC resistance of these samples was improved compared to the T6 sample, due to the enlargement in the size and the inter-particle distance of the grain boundaries precipitates and the decreases in the number of the GP zone. Especially, the sample aged at 200 degrees C for 5 min exhibited a similar SCC resistance and much higher elongation compared the T76 sample. (C) 2008 Elsevier B.V. All rights reserved.
部门归属	[wang, d.; ni, d. r.; ma, z. y.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;ma, zy (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;zyma@imr.ac.cn
关键词	Aluminum Stress Corrosion Cracking Heat Treatment Pre-strain Grain Boundary Mg-cu Alloy Aluminum-alloy Hydrogen Embrittlement Mechanical-properties Scc-resistance Strength Precipitation Aa7050
URL	查看原文
WOS记录号	WOS:000259983700050
引用统计	被引频次：118[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33117
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. Wang,D. R. Ni,Z. Y. Ma. Effect of pre-strain and two-step aging on microstructure and stress corrosion cracking of 7050 alloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2008,494(1-2):360-366.
APA	D. Wang,D. R. Ni,&Z. Y. Ma.(2008).Effect of pre-strain and two-step aging on microstructure and stress corrosion cracking of 7050 alloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,494(1-2),360-366.
MLA	D. Wang,et al."Effect of pre-strain and two-step aging on microstructure and stress corrosion cracking of 7050 alloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 494.1-2(2008):360-366.