Effects of post-weld heat-treatment and second-welding on tensile properties of friction stir welded 7075-T651 aluminum alloy

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	Effects of post-weld heat-treatment and second-welding on tensile properties of friction stir welded 7075-T651 aluminum alloy
	Ren Shurong ; Ma Zongyi ; Chen Liqing ; Zhang Yuzheng
刊名	ACTA METALLURGICA SINICA
	2007-03-01
卷号	43 期号:3 页码:225-230
关键词	friction stir welding aluminum alloy solid solution tensile property
ISSN号	0412-1961
通讯作者	Ma Zongyi(zyma@imr.ac.cn)
英文摘要	8 nun thick 7075-T651 aluminum alloy rolled plate was friction stir welded, and the effects of post-weld heat-treatment and second-welding of the weld back on the tensile property were investigated. The results show that the single-welded sample is defect-free and the transverse strength of the weld is 71% of the base materials. However, a lazy "S" line appeared in the nugget zone as zigzag crack and discontinuous cavities after post-weld T6-treatment. With increasing solution temperature, the "S" line and abnormal grain growth became evident. After post-weld T6-treatment, the Vickers hardness of the weld was restored to the level of parent material, but the strength and elongation were significantly reduced due to the crack initiation and propagation along the "S" line. The tensile properties were greatly improved after second-welding of the weld back.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000245687500001
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/89262]
专题	金属研究所_中国科学院金属研究所
通讯作者	Ma Zongyi
作者单位	1.Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China 2.Northeastern Univ, Coll Sci, Shenyang 110004, Peoples R China 3.Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110004, Peoples R China
推荐引用方式 GB/T 7714	Ren Shurong,Ma Zongyi,Chen Liqing,et al. Effects of post-weld heat-treatment and second-welding on tensile properties of friction stir welded 7075-T651 aluminum alloy[J]. ACTA METALLURGICA SINICA,2007,43(3):225-230.
APA	Ren Shurong,Ma Zongyi,Chen Liqing,&Zhang Yuzheng.(2007).Effects of post-weld heat-treatment and second-welding on tensile properties of friction stir welded 7075-T651 aluminum alloy.ACTA METALLURGICA SINICA,43(3),225-230.
MLA	Ren Shurong,et al."Effects of post-weld heat-treatment and second-welding on tensile properties of friction stir welded 7075-T651 aluminum alloy".ACTA METALLURGICA SINICA 43.3(2007):225-230.