Effect of heat treatment on eutectic silicon morphology and mechanical property of Al-Si-Cu-Mg cast alloys

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	Effect of heat treatment on eutectic silicon morphology and mechanical property of Al-Si-Cu-Mg cast alloys
	R. X. Li; R. D. Li; Y. H. Zhao; C. X. Li; X. F. Sun; H. R. Guan; Z. Q. Hu
	2004
发表期刊	Transactions of Nonferrous Metals Society of China
ISSN	1003-6326
卷号	14 期号:3 页码:496-500
摘要	Through morphology observation on silicon particles of Al-Si-Cu-Mg cast alloy, it is found that during solution treatment the evolution of eutectic silicon morphology and their effect on mechanical properties can be classified into three stages. In the initial stage, necking, stubbing and fragmentation of silicon particles result in the improvement of plasticity of alloy. In the intermediate stage, the mechanical properties of 354 alloy attain peak values due to spheroidization of silicon particles. In the final stage, the drop of hardness and strength is related to the deterioration of silicon morphology. The facets and lap occur in silicon particles and the coarsening process of silicon follows LSW model. During aging, the clusters of excess silicon can work as barriers for dislocation movement and thus enhance the strength of alloy. On the other hand, excess Si affects the process of aging precipitation and leads to a fine and highly dense distribution of GP zones, finally effectively strengthens the alloy.
部门归属	shenyang inst aeronaut engn, dept mat engn, shenyang 110034, peoples r china. shenyang univ technol, sch mat sci & engn, shenyang 110023, peoples r china. chinese acad sci, inst met res, shenyang 110016, peoples r china.;li, rx (reprint author), shenyang inst aeronaut engn, dept mat engn, shenyang 110034, peoples r china;runxiali@hotmail.com
关键词	Al-si-cu-mg Alloy Eutectic Silicon Mechanical Property Heat Treatment Quantitative Metallography Phase
URL	查看原文
WOS记录号	WOS:000222451000017
引用统计	被引频次：12[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/321006/35418
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	R. X. Li,R. D. Li,Y. H. Zhao,et al. Effect of heat treatment on eutectic silicon morphology and mechanical property of Al-Si-Cu-Mg cast alloys[J]. Transactions of Nonferrous Metals Society of China,2004,14(3):496-500.
APA	R. X. Li.,R. D. Li.,Y. H. Zhao.,C. X. Li.,X. F. Sun.,...&Z. Q. Hu.(2004).Effect of heat treatment on eutectic silicon morphology and mechanical property of Al-Si-Cu-Mg cast alloys.Transactions of Nonferrous Metals Society of China,14(3),496-500.
MLA	R. X. Li,et al."Effect of heat treatment on eutectic silicon morphology and mechanical property of Al-Si-Cu-Mg cast alloys".Transactions of Nonferrous Metals Society of China 14.3(2004):496-500.