Effects of the Addition of Mg on the Microstructure and Mechanical Properties of Hypoeutectic Al-7%Si Alloy

doi:10.1007/s40962-016-0131-6

	Effects of the Addition of Mg on the Microstructure and Mechanical Properties of Hypoeutectic Al-7%Si Alloy
	Li, Qinglin 1; Li, Binqiang ; Li, Jinbao ; Xia, Tiandong ; Lan, Yefeng ; Guo, Tinbiao
刊名	INTERNATIONAL JOURNAL OF METALCASTING
	2017-10
卷号	11 期号:4 页码:823-830
关键词	Al-7% Si alloy Mg microstructure mechanical properties
ISSN号	1939-5981
DOI	10.1007/s40962-016-0131-6
英文摘要	It is well known that the mechanical properties of hypoeutectic Al-Si alloys are influenced by the size, morphology and distribution of primary alpha-Al dendrites, eutectic Si crystals and other intermetallics. In the present work, the effect of Mg addition on the size and morphology of the primary alpha-Al dendrites and eutectic Si phases in Al-7%Si alloy has been investigated. The microstructure of as-cast samples with different Mg content was characterized by scanning electron microscopy. Microstructural analyses demonstrated that primary alpha-Al was significantly refined from coarse dendrites to fine equiaxed grain with increasing the amounts of Mg. In addition, the eutectic Si structure was modified from coarse needle-like/platelet-like structure to a fine coral-like fibrous structure. The mechanical properties were investigated by tensile test with various concentrations of Mg. It was found that the ultimate tensile strength improved by 61% with an increase in Mg content. However, the ductility initially increased by 80% with an increase in Mg content from 0.5 to 1.5%, then it decreased with further increasing Mg content up to 2.0 and 2.5%. It is due to precipitation of coarse Chinese script Mg2Si phase that leads to the increase in strength and the decrease in ductility.
资助项目	National Natural Science Foundation of China[51561021] ; Institution Science Research Project of Gan Su Province in China[2015B-035] ; Gan Su Province Natural Science Foundation[1606RJZA024]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SPRINGER INTERNATIONAL PUBLISHING AG
WOS记录号	WOS:000411572600015
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33068]
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	Li, Qinglin
作者单位	1.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou, Gansu, Peoples R China 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Li, Qinglin,Li, Binqiang,Li, Jinbao,et al. Effects of the Addition of Mg on the Microstructure and Mechanical Properties of Hypoeutectic Al-7%Si Alloy[J]. INTERNATIONAL JOURNAL OF METALCASTING,2017,11(4):823-830.
APA	Li, Qinglin,Li, Binqiang,Li, Jinbao,Xia, Tiandong,Lan, Yefeng,&Guo, Tinbiao.(2017).Effects of the Addition of Mg on the Microstructure and Mechanical Properties of Hypoeutectic Al-7%Si Alloy.INTERNATIONAL JOURNAL OF METALCASTING,11(4),823-830.
MLA	Li, Qinglin,et al."Effects of the Addition of Mg on the Microstructure and Mechanical Properties of Hypoeutectic Al-7%Si Alloy".INTERNATIONAL JOURNAL OF METALCASTING 11.4(2017):823-830.