Effect of mischmetal on microstructure and mechanical properties of hypereutectic Al-20Si alloy

doi:10.19476/j.ysxb.1004.0609.2017.12.06

	Effect of mischmetal on microstructure and mechanical properties of hypereutectic Al-20Si alloy
	Li, Qing-Lin 1,2; Li, Bin-Qiang 1; Li, Jin-Bao 1; Lan, Ye-Feng 1,2; Xia, Tian-Dong 1,2
刊名	Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
	2017-12-01
卷号	27 期号:12 页码:2443-2450
关键词	Aluminum alloys Electron probe microanalysis Eutectics Mechanical properties Microstructure Morphology Praseodymium Rare earth alloys Scanning electron microscopy Tensile strength Electron probe analysis Eutectic silicon Fibrous structures Microstructure and mechanical properties Misch metal Primary silicon Si alloys Ultimate tensile strength
ISSN号	10040609
DOI	10.19476/j.ysxb.1004.0609.2017.12.06
英文摘要	By optical microscopy, scanning electron microscopy, electron probe analysis and mechanical property test, the effects of mischmetal Pr and Y on the microstructure and mechanical properties of hypereutectic Al-20Si alloy were investigated. The results show that the addition of mischmetal Pr and Y can effectively modify the primary Si from coarse polygonal and star-like shape to fine blocky shape with smooth edges and corners. When the mass ratio of mischmetal Pr and Y is 1:1 (0.5%Pr, 0.5%Y (mass fraction)), the consequence of modification is the best on primary silicon and eutectic silicon, the size of primary silicon reduces by 57.3% from 96 µm to 41 µm. In addition, the morphology of eutectic silicon changes from coarse platelet-like/needle-like structure to fine fibrous structure and worm-like. The ultimate tensile strength increases by 53.8% from 93 MPa to 143 MPa, and the elongation increases by 149% from 1.12% to 2.79%, respectively. © 2017, Science Press. All right reserved.
语种	中文
出版者	Central South University of Technology
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114276]
专题	材料科学与工程学院兰州理工大学
作者单位	1.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Li, Qing-Lin,Li, Bin-Qiang,Li, Jin-Bao,et al. Effect of mischmetal on microstructure and mechanical properties of hypereutectic Al-20Si alloy[J]. Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,2017,27(12):2443-2450.
APA	Li, Qing-Lin,Li, Bin-Qiang,Li, Jin-Bao,Lan, Ye-Feng,&Xia, Tian-Dong.(2017).Effect of mischmetal on microstructure and mechanical properties of hypereutectic Al-20Si alloy.Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,27(12),2443-2450.
MLA	Li, Qing-Lin,et al."Effect of mischmetal on microstructure and mechanical properties of hypereutectic Al-20Si alloy".Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals 27.12(2017):2443-2450.