Effect of yttrium addition on the microstructures and mechanical properties of hypereutectic Al-2OSi alloy

doi:10.1016/j.msea.2018.03.015

CORC > 兰州理工大学 > 兰州理工大学 > 省部共建有色金属先进加工与再利用国家重点实验室

	Effect of yttrium addition on the microstructures and mechanical properties of hypereutectic Al-2OSi alloy
	Li, Qinglin 1,2; Li, Binqiang 1; Li, Jinbao 1; Zhu, Yuqian 1; Xia, Tiandong 1,2
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2018-04-11
卷号	722 页码:47-57
关键词	Al-20Si alloy Primary Si Eutectic Si Rare earth Y Mechanical properties
ISSN号	0921-5093
DOI	10.1016/j.msea.2018.03.015
英文摘要	The effects of Y additions (0.2, 0.4, 0.6, 0.8 and 1.0 wt%) on the microstructure and mechanical properties of hypereutecdc Al-20Si alloy have been studied in the present work. The as-cast specimens were examined by scanning electron microscope (SEM) equipped with energy spectrometer (EDS), electron probe micro-analysis (EPMA) and X-ray diffraction (lCRD). The results demonstrated that the morphology of primary Si could be refined from coarse irregular star-like and plate-like shape to fine block-like when the addition contents of Y increased to 0.8%. The average size of primary Si reduced by 62.9% from 89 pm to 33 pm and the aspect ratio decreased by 38.6% from 2.07 to 1.27. In addition, the eutectic Si structure was modified from coarse needle / flake to fine coral fibrous structure and partial particles. With the refinement and homogenization of Si phases, the optimal elongation (El) increased by 22.5% from 1.13% to 1.36% when the Y content was 0.6%. However, the ultimate tensile strength (UTS) enhanced by 47.9% from 94 MPa to 139 MPa when the addition content of Y was up to 0.8%. Moreover, the refinement and modification mechanism of Y on Al-20Si alloy was also discussed.
资助项目	National Natural Science Foundation of China[51561021] ; Natural Science Foundation of Gansu Province in China[1606RJZA024] ; Institution Science Research Project of Gansu Province in China[2015B-035]
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:000430525100007
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32697]
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院
通讯作者	Li, Qinglin
作者单位	1.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Li, Qinglin,Li, Binqiang,Li, Jinbao,et al. Effect of yttrium addition on the microstructures and mechanical properties of hypereutectic Al-2OSi alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2018,722:47-57.
APA	Li, Qinglin,Li, Binqiang,Li, Jinbao,Zhu, Yuqian,&Xia, Tiandong.(2018).Effect of yttrium addition on the microstructures and mechanical properties of hypereutectic Al-2OSi alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,722,47-57.
MLA	Li, Qinglin,et al."Effect of yttrium addition on the microstructures and mechanical properties of hypereutectic Al-2OSi alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 722(2018):47-57.