Effect of iron addition on the microstructures and properties of hypereutectic Al-20%Si alloys

doi:10.1088/2053-1591/aae227

	Effect of iron addition on the microstructures and properties of hypereutectic Al-20%Si alloys
	Li, Qinglin 1,2; Zhu, Yuqian 1,2; Li, Binqiang 1,2; Ding, Wanwu 1,2; Lan, Yefeng 1,2; Xia, Tiandong 1,2; Du, Qianbiao 1,2
刊名	MATERIALS RESEARCH EXPRESS
	2019-01
卷号	6 期号:1
关键词	hypereutectic Al-20%Si alloy primary Si eutectic Si Fe concentration mechanical properties wear behaviors
ISSN号	2053-1591
DOI	10.1088/2053-1591/aae227
英文摘要	The microstructural evolution, mechanical properties and wear behaviors of hypereutectic Al-20%Si alloy with the different additions of Fe (0, 1.0, 1.5, 2.0, and 2.5 wt%) were investigated. The as-cast specimens were evaluated by scanning electron microscope (SEM), electron probe micro-analysis (EPMA) equipped with wavelength dispersive spectroscopy (WDS) and x-ray diffraction (XRD). The results indicated that the primary Si phases were significantly refined from coarse platelet-like, irregular polygonal and star-like shape to fine blocky shape when the addition contents of Fe was up to 2.5%. Meanwhile, the eutectic Si structure was modified from coarse platelet-like/needle-like to fine granular and short rod structure. The tensile test illustrated that the ultimate tensile strength and elongation firstly increased with the increasing Fe content from 0% to 1.5%, and then decreased when the concentration of Fe improved from 2.0% to 2.5%. When the addition level of Fe was 1.5%, the ultimate tensile strength and elongation were 175 MPa and 1.84%, respectively. In addition, the wear behaviors of Al-20%Si alloy with the different Fe content were investigated. The results showed that the friction coefficient firstly decreased as 1.0%Fe was added into the Al-20%Si alloy. However, the friction coefficient gradually increased with the further increasing Fe content from 1.0% to 2.5%. In addition, the wear rate decreased by 46.8% from 2.65 x 10(-5 )g m(-1) to 1.41 x 10(-5) g m(-1), which showed the wear resistance of hypereutectic Al-20%Si alloy gradually increased with Fe concentration.
资助项目	National Science Foundation of China[51561021][51661021]
WOS研究方向	Materials Science
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000446680000002
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32191]
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 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,Zhu, Yuqian,Li, Binqiang,et al. Effect of iron addition on the microstructures and properties of hypereutectic Al-20%Si alloys[J]. MATERIALS RESEARCH EXPRESS,2019,6(1).
APA	Li, Qinglin.,Zhu, Yuqian.,Li, Binqiang.,Ding, Wanwu.,Lan, Yefeng.,...&Du, Qianbiao.(2019).Effect of iron addition on the microstructures and properties of hypereutectic Al-20%Si alloys.MATERIALS RESEARCH EXPRESS,6(1).
MLA	Li, Qinglin,et al."Effect of iron addition on the microstructures and properties of hypereutectic Al-20%Si alloys".MATERIALS RESEARCH EXPRESS 6.1(2019).