Effects of in-situ γ-Al2O3 particles and heat treatment on the microstructure and mechanical properties of A356 aluminium alloy

doi:10.1016/j.jallcom.2014.11.212

	Effects of in-situ γ-Al2O3 particles and heat treatment on the microstructure and mechanical properties of A356 aluminium alloy
	Li, Qinglin; Li, Fubin; Xia, Tiandong; Lan, Yefeng; Jian, Yisheng; Tao, Fan
	2015-04-05
发表期刊	Journal of Alloys and Compounds
ISSN	09258388
卷号	627 页码:352-358
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 α-Al and eutectic Si crystals. In the present study, the effect of in-situ γ-Al2O3 particles and heat treatment on the size and morphology of the primary α-Al dendrites and eutectic Si phases in A356 alloy has been investigated. The as-cast and solution treatment samples were characterized by scanning electron microscopy (SEM). Microstructural analyses demonstrated that primary α-Al was significantly refined by in-situ γ-Al2O3 particles. The secondary dendrite arm space (SDAS) of unrefined α-Al is about 25 μm. The SDAS decreases to 11 μm when the content of in-situ γ-Al2O3 particles is 0.6%. In addition, the eutectic Si structure was modified from coarse needle-like/platelet-like structure to short plate-like structure and some discrete particles. The mechanical properties were investigated by tensile test with various concentrations of γ-Al2O3 particles. It was found that the ultimate tensile strength (UTS) and elongation (El) increased by 41% and 137%, respectively, due to decreasing SDAS of primary α-Al dendrites and modifying eutectic Si crystals. Moreover, the change of mechanical properties corresponds to the evolution of microstructure. © 2014 Elsevier B.V. All rights reserved.
关键词	Alumina Aluminum oxide Dendrites (metallography) Eutectics Heat treatment Mechanical properties Microstructural evolution Microstructure Morphology Particle size analysis Scanning electron microscopy Silicon alloys Tensile strength Tensile testing A356 alloys A356 aluminium alloy Hypoeutectic Al-Si alloy In-situ reactions Microstructural analysis Microstructure and mechanical properties Plate-like structure Ultimate tensile strength
DOI	10.1016/j.jallcom.2014.11.212
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000348504800050
出版者	Elsevier Ltd
EI入藏号	20150300423804
EI主题词	Aluminum alloys
EI分类号	531.2 Metallography - 537.1 Heat Treatment Processes - 541.2 Aluminum Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804.2 Inorganic Compounds - 933.1 Crystalline Solids - 951 Materials Science
来源库	Compendex
分类代码	531.2 Metallography - 537.1 Heat Treatment Processes - 541.2 Aluminum Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804.2 Inorganic Compounds - 951 Materials Science
引用统计	被引频次：24[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/112474
专题	材料科学与工程学院
通讯作者	Li, Qinglin
作者单位	Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China; Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
第一作者单位	省部共建有色金属先进加工与再利用国家重点实验室
通讯作者单位	省部共建有色金属先进加工与再利用国家重点实验室
第一作者的第一单位	省部共建有色金属先进加工与再利用国家重点实验室
推荐引用方式 GB/T 7714	Li, Qinglin,Li, Fubin,Xia, Tiandong,et al. Effects of in-situ γ-Al2O3 particles and heat treatment on the microstructure and mechanical properties of A356 aluminium alloy[J]. Journal of Alloys and Compounds,2015,627:352-358.
APA	Li, Qinglin,Li, Fubin,Xia, Tiandong,Lan, Yefeng,Jian, Yisheng,&Tao, Fan.(2015).Effects of in-situ γ-Al2O3 particles and heat treatment on the microstructure and mechanical properties of A356 aluminium alloy.Journal of Alloys and Compounds,627,352-358.
MLA	Li, Qinglin,et al."Effects of in-situ γ-Al2O3 particles and heat treatment on the microstructure and mechanical properties of A356 aluminium alloy".Journal of Alloys and Compounds 627(2015):352-358.