Effect of eutectic Si on surface nanocrystallization of Al-Si alloys by surface mechanical attrition treatment

IMR OpenIR

	Effect of eutectic Si on surface nanocrystallization of Al-Si alloys by surface mechanical attrition treatment
	H. W. Chang; P. M. Kelly; Y. N. Shi; M. X. Zhang
	2011
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	530 页码:304-314
摘要	Pure Al (AA196) and Al-Si (A356) alloy were subjected to surface nanocrystallization through surface mechanical attrition treatment (SMAT). Strain induced microstructure evolution, including grain refinement of Al matrix and Si particles, was examined using transmission electron microscopy. Nanocrystallization of Al matrix in both pure Al and A356 alloy occurs through formation of dislocation cells separated by dense dislocation walls and dislocation tangle within the original coarse grains or subdivided subgrains. During SMAT, the brittle Si phase is preferentially refined through direct breakage. The Al matrix refinement process is greatly facilitated by the dispersed small Si particles, because such particles can not only act as obstacles for dislocation movement, but also promote dislocation generation and multiplication. Comparing to pure Al, thicker nanouystalline zone can be obtained with much smaller stabilized nano-metered grains in the Al-Si alloy. Due to the low diffusion rate of Si in Al matrix at low temperature, there is no obvious re-dissolve of Si particles into Al during SMAT process. (C) 2011 Elsevier B.V. All rights reserved.
部门归属	[chang, h. -w.; kelly, p. m.; zhang, m. -x.] univ queensland, sch mech & min engn, div mat, brisbane, qld 4072, australia. [shi, y. -n.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;zhang, mx (reprint author), univ queensland, sch mech & min engn, div mat, brisbane, qld 4072, australia;mingxing.zhang@uq.edu.au
关键词	Smat Al-si Cast Alloy Nanocrystalline Material Grain Refinement Dislocation Gliding Induced Grain-refinement Pure Titanium Steel Layer Evolution
URL	查看原文
WOS记录号	WOS:000298311100038
引用统计	被引频次：21[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/321006/30247
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. W. Chang,P. M. Kelly,Y. N. Shi,et al. Effect of eutectic Si on surface nanocrystallization of Al-Si alloys by surface mechanical attrition treatment[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2011,530:304-314.
APA	H. W. Chang,P. M. Kelly,Y. N. Shi,&M. X. Zhang.(2011).Effect of eutectic Si on surface nanocrystallization of Al-Si alloys by surface mechanical attrition treatment.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,530,304-314.
MLA	H. W. Chang,et al."Effect of eutectic Si on surface nanocrystallization of Al-Si alloys by surface mechanical attrition treatment".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 530(2011):304-314.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Effect of eutectic S（1000KB）			开放获取	--