Tensile properties and fracture mechanism of Al-Mg alloy subjected to equal channel angular pressing

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	Tensile properties and fracture mechanism of Al-Mg alloy subjected to equal channel angular pressing
	D. R. Fang; Q. Q. Duan; N. Q. Zhao; J. J. Li; S. D. Wu; Z. F. Zhang
	2007
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	459 期号:1-2 页码:137-144
摘要	Casting Al-2.77 wt.% Mg alloy was subjected to equal channel angular pressing (ECAP) and subsequent low-temperature annealing treatment. Tensile properties and fracture modes of as-ECAPed and annealed samples were investigated. It is found that the strength of the Al-Mg alloy increases with increasing the number of ECAP passes, while its elongation decreases. After annealing, the elongation is recovered to a large extent, consequently, the static toughness of the alloy is enhanced by a combination of ECAP and annealing treatment. Vickers hardness HV of the Al-Mg alloy monotonously increases with increasing the number of ECAP passes and follows a relationship of HV/sigma(b)approximate to 2.5, independent of the number of ECAP passes. Meanwhile, it is noted that the casting alloy only exhibits necking before failure, while the alloy subjected to ECAP fails in shear mode, with an increasing shear fracture angle at high number of ECAP passes. Besides, the low temperature annealing treatment hardly affects the tensile fracture mode of the ECAPed alloy. Based on the experimental results above, the tensile failure mechanisms of the ECAPed Al-Mg alloy are discussed. (C) 2007 Elsevier B.V. All rights reserved.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. tianjin univ, sch mat sci & engn, tianjin 300072, peoples r china.;zhang, zf (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;zhfzhang@imr.ac.cn
关键词	Al-mg Alloy Equal Channel Angular Pressing (Ecap) Strength Elongation Static Toughness Hardness Shear Fracture Severe Plastic-deformation Submicrometer Grain-size Microstructure Ductility Temperature Refinement Extrusion Strength Behavior
URL	查看原文
WOS记录号	WOS:000246729300019
引用统计	被引频次：94[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33522
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. R. Fang,Q. Q. Duan,N. Q. Zhao,et al. Tensile properties and fracture mechanism of Al-Mg alloy subjected to equal channel angular pressing[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2007,459(1-2):137-144.
APA	D. R. Fang,Q. Q. Duan,N. Q. Zhao,J. J. Li,S. D. Wu,&Z. F. Zhang.(2007).Tensile properties and fracture mechanism of Al-Mg alloy subjected to equal channel angular pressing.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,459(1-2),137-144.
MLA	D. R. Fang,et al."Tensile properties and fracture mechanism of Al-Mg alloy subjected to equal channel angular pressing".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 459.1-2(2007):137-144.