Effects of rare earth Er addition on microstructure and mechanical properties of hypereutectic Al-20% Si alloy

doi:10.1016/j.msea.2013.09.017

	Effects of rare earth Er addition on microstructure and mechanical properties of hypereutectic Al-20% Si alloy
	Li, Qinglin 1,2; Xia, Tiandong 1,2; Lan, Yefeng 1,2; Li, Pengfei 1; Fan, Lu 1
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2013-12-20
卷号	588 页码:97-102
关键词	Hypereutectic Al-20%Si alloy Primary Si Eutectic Si Rare earth Er Mechanical properties
ISSN号	0921-5093
DOI	10.1016/j.msea.2013.09.017
英文摘要	The microstructure evolution and mechanical properties of hypereutectic Al-20%Si alloy with Er addition were investigated in the article. The as-cast samples were characterized by optical microscopy (OM), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA). Microstructural analyses demonstrated that primary Si was significantly refined from coarse polygonal, platelet-like and star-like shape to fine blocky shape, and eutectic Si structure was modified from coarse platelet-like/needle-like structure to fine coral-like fibrous structure as the addition contents of Er is 0.5%. However, the primary and eutectic Si phases became coarser when the level of rare earth Er was up to 0.8%. The mechanical properties were investigated by tensile test with various concentration of Er. It was found that the ultimate tensile strength (UTS) and elongation (El) increased by 72.5% and 72%, respectively, due to decreasing of the size and changing of morphology on primary and eutectic Si crystals, and the change of mechanical properties corresponds to the evolution of microstructure. In addition, the modification mechanism of Er on Al-20%Si alloy was also discussed. (C) 2013 Elsevier B.V. All rights reserved.
资助项目	Natural Science Foundation of Gansu Province in China[1212RJYA021]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000328176900014
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/34560]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Xia, Tiandong
作者单位	1.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China 2.Lanzhou Univ Technol, State Key Lab Gansu Adv Nonferrous Met Mat, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Li, Qinglin,Xia, Tiandong,Lan, Yefeng,et al. Effects of rare earth Er addition on microstructure and mechanical properties of hypereutectic Al-20% Si alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2013,588:97-102.
APA	Li, Qinglin,Xia, Tiandong,Lan, Yefeng,Li, Pengfei,&Fan, Lu.(2013).Effects of rare earth Er addition on microstructure and mechanical properties of hypereutectic Al-20% Si alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,588,97-102.
MLA	Li, Qinglin,et al."Effects of rare earth Er addition on microstructure and mechanical properties of hypereutectic Al-20% Si alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 588(2013):97-102.