The origin of non-uniform microstructure and its effects on the mechanical properties of a friction stir processed Al-Mg alloy
文献类型:期刊论文
作者 | G. R. Cui ; Z. Y. Ma ; S. X. Li |
刊名 | Acta Materialia
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出版日期 | 2009 |
卷号 | 57期号:19页码:5718-5729 |
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 |
ISSN号 | 1359-6454 |
中文摘要 | 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. |
原文出处 | |
公开日期 | 2012-04-13 |
源URL | [http://210.72.142.130/handle/321006/31853] ![]() |
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 | 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. |
入库方式: OAI收割
来源:金属研究所
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