Effect of friction stir processing on the microstructure of cast A356 aluminum

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	Effect of friction stir processing on the microstructure of cast A356 aluminum
	Z. Y. Ma; S. R. Sharma; R. S. Mishra
	2006
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	433 期号:1-2 页码:269-278
摘要	Friction stir processing (FSP) was applied to cast A356 Al to modify the as-cast microstructure. FSP homogenizes and. refines the cast microstruclure, completely eliminates porosity, and creates a microstructure with fine Si particles (0.25-0.42 mu m) distributed in a fine grain aluminum matrix (3-4 mu m). Further, FSP parameters significantly influence microstructural development in the processed zone of cast A356 Al. Generally, higher tool rotation rate creates a more homogeneous microstructure. At lower tool rotation rates, a macroscopically visible banded structure characterized by a low density of coarse particles, was detected in the nugget zone. However, FSP parameters did not significantly influence the Al matrix grain size. The varied distribution pattern, size, and volume fraction of Si particles at different locations within the FSP zone indicates inhomogeneous material flow. A post-FSP T6 heat treatment did not alter the Si particle distribution, but did significantly coarsen the Si particles. (c) 2006 Elsevier B.V. All rights reserved.
部门归属	univ missouri, ctr frict stir proc, dept mat sci & engn, rolla, mo 65409 usa. chinese acad sci, inst met res, shenyang 110016, peoples r china.;mishra, rs (reprint author), univ missouri, ctr frict stir proc, dept mat sci & engn, rolla, mo 65409 usa;rsmishra@umr.edu
关键词	Friction Stir Processing A356 Microstructural Modification Casting Strain Rate Superplasticity Si-mg Alloys Mechanical-properties Fatigue Behavior Heat-treatment Strength Particles Welds
URL	查看原文
WOS记录号	WOS:000240821400039
引用统计	被引频次：185[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/321006/34398
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. Y. Ma,S. R. Sharma,R. S. Mishra. Effect of friction stir processing on the microstructure of cast A356 aluminum[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2006,433(1-2):269-278.
APA	Z. Y. Ma,S. R. Sharma,&R. S. Mishra.(2006).Effect of friction stir processing on the microstructure of cast A356 aluminum.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,433(1-2),269-278.
MLA	Z. Y. Ma,et al."Effect of friction stir processing on the microstructure of cast A356 aluminum".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 433.1-2(2006):269-278.