Influences of Fe, Mn and Y additions on microstructure and mechanical properties of hypoeutectic Al–7%Si alloy

doi:10.1016/j.intermet.2020.106768

	Influences of Fe, Mn and Y additions on microstructure and mechanical properties of hypoeutectic Al–7%Si alloy
	Li, Qinglin 1,2; Zhu, Yuqian 1,2; Zhao, Shang 1,2; Lan, Yefeng 1,2; Liu, Dexue 1,2; Jian, Guangfei 1,2; Zhang, Qiang 1,2; Zhou, Hongwei 1,2
刊名	Intermetallics
	2020-05-01
卷号	120
关键词	Aluminum metallography Dendrites (metallography) Ductile fracture Eutectics Intermetallics Iron metallography Manganese alloys Manganese metallography Mechanical properties Metal testing Microstructure Rare earth additions Rare earths Tensile strength Tensile testing Average grain size Complex addition Master alloys Microstructure and mechanical properties Rare-earth Y Secondary dendrite arm spacing Si alloys Ultimate tensile strength
ISSN号	09669795
DOI	10.1016/j.intermet.2020.106768
英文摘要	In this work, the influences of Fe, Mn and Y with various contents on microstructural evolution and mechanical properties of hypoeutectic Al–7%Si alloy were investigated by microscopy technology and tensile test. The results showed that the complex addition of Al–20%Si-2.5%Fe–2%Mn master alloy and rare earth Y have much better refining effect of need-like eutectic Si and coarse α-Al dendrites than that of separate addition of master alloy or rare earth Y. Combined additions of 7.0% master alloy and 0.2% Y, the average grain size was decreased by 89.5% from 483.1 μm to 50.8 μm and secondary dendrite arm spacing (SDAS) was reduced by 46.8% from 26.9 μm to 14.3 μm. Moreover, the coarse flake-like eutectic Si structure was effectively modified into fine fiber and granular shape. In addition, ultimate tensile strength (UTS) was improved by 33.3% from 162 MPa to 216 MPa, and elongation (El) value was enhanced by 46.7% from 6.2% to 9.1%. The fracture mode transformed from brittle fracture to ductile fracture. © 2020 Elsevier Ltd
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000528268500020
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150790]
专题	材料科学与工程学院
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, Qinglin,Zhu, Yuqian,Zhao, Shang,et al. Influences of Fe, Mn and Y additions on microstructure and mechanical properties of hypoeutectic Al–7%Si alloy[J]. Intermetallics,2020,120.
APA	Li, Qinglin.,Zhu, Yuqian.,Zhao, Shang.,Lan, Yefeng.,Liu, Dexue.,...&Zhou, Hongwei.(2020).Influences of Fe, Mn and Y additions on microstructure and mechanical properties of hypoeutectic Al–7%Si alloy.Intermetallics,120.
MLA	Li, Qinglin,et al."Influences of Fe, Mn and Y additions on microstructure and mechanical properties of hypoeutectic Al–7%Si alloy".Intermetallics 120(2020).