The origin of non-uniform microstructure and its effects on the mechanical properties of a friction stir processed Al-Mg alloy

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	The origin of non-uniform microstructure and its effects on the mechanical properties of a friction stir processed Al-Mg alloy
	G. R. Cui; Z. Y. Ma; S. X. Li
	2009
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	57 期号:19 页码:5718-5729
摘要	The microstructure of the stirred zone (SZ) resulting from friction stir processing or welding (FSP/FSW) has usually been assumed to be uniform when discussing the mechanical properties. However, numerous works have indicated that the fine-grained microstructures in the SZ were non-uniform, with precipitate, texture and grain size gradients caused by the severe plastic deformation and heat distribution. In this work commercial aluminum alloy 5083-H112 was subjected to FSP and fine-grained microstructures with an average grain sizes of 2.7-13.4 mu m were obtained by controlling the FSP conditions. The stress-strain curves exhibited stepped yield point elongation, which was suggested to be associated with these characteristic non-uniform microstructures. Tensile tests indicated that the Hall-Petch relationship held in this FSP alloy when taking account of the average grain size. Toughness analysis indicated that the optimum toughness was anticipated to be obtained around a grain size of similar to 1 mu m for this FSP alloy. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[cui, g. r.; ma, z. y.; li, s. x.] 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, shenyang 110016, peoples r china;zyma@imr.ac.cn
关键词	Friction Stir Processing Aluminum Alloys Grain Refining Mechanical Properties Yield Phenomena Fine-grained Aluminum Luders Strain Plastic-flow Welds Deformation Size Recrystallization Superplasticity Model
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WOS记录号	WOS:000271668200009
引用统计	被引频次：106[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/321006/31853
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. R. Cui,Z. Y. Ma,S. X. Li. The origin of non-uniform microstructure and its effects on the mechanical properties of a friction stir processed Al-Mg alloy[J]. Acta Materialia,2009,57(19):5718-5729.
APA	G. R. Cui,Z. Y. Ma,&S. X. Li.(2009).The origin of non-uniform microstructure and its effects on the mechanical properties of a friction stir processed Al-Mg alloy.Acta Materialia,57(19),5718-5729.
MLA	G. R. Cui,et al."The origin of non-uniform microstructure and its effects on the mechanical properties of a friction stir processed Al-Mg alloy".Acta Materialia 57.19(2009):5718-5729.