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
刊名	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
	2008
卷号	494 期号:1-2 页码:360-366
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
ISSN号	0921-5093
中文摘要	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.
原文出处	://WOS:000259983700050
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/33117]
专题	金属研究所_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.