Effect of microstructure and texture on the mechanical properties of the as-extruded Mg-Zn-Y-Zr alloys

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	Effect of microstructure and texture on the mechanical properties of the as-extruded Mg-Zn-Y-Zr alloys
	D. K. Xu; L. Liu; Y. B. Xu; E. H. Han
	2007
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	443 期号:1-2 页码:248-256
摘要	This work mainly studied the influence of the microstructure and crystallographic texture on the mechanical properties of the as-extruded Mg-Zn-Y-Zr alloys with different Y contents. The samples were machined from thick plates obtained by extrusion and the tensile tests were performed parallel to extrusion and transverse directions, respectively. Microstructure observation firmly indicated that the grain-refining effect of icosahedral quasicrystal phase (I-phase) was superior to that of the cubic W-phase. In addition, the tensile results indicated that I-phase could effectively improve the strength (yield strength and ultimate tensile strength) of alloys. However, strengthening effect of W-phase was lower. With the quantity of W-phase increasing, the strength of alloys was degraded. It also showed that the alloys were mechanically anisotropic, i.e. the longitudinal strength was higher than that of the transverse direction. However, the ductility of the transverse direction was superior. With the increase of Mg-Zn-Y phases, the anisotropy of the ultimate tensile strength (UTS) between the longitudinal and transverse directions increased remarkably. SEM fracture observations showed that the fractures of the TD samples were characterized by the typical "woody fracture", with a large amount of cracked Mg-Zn-Y particles (I-phase and W-phase) distributed at the bottom of dimples. With Y content increasing, the average spacing of the zonal distributed Ma-Zn-Y particles on the fracture surface became narrow, which influenced the transverse mechanical properties greatly. (c) 2006 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. chinese acad sci, inst met res, environm corros ctr, shenyang 110016, peoples r china.;xu, dk (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;dkxu@imr.ac.cn
关键词	Mg Alloy Crystallographic Texture Anisotropy Woody Fracture Mechanical Properties Az31 Magnesium Alloy Metal Matrix Composites 2nd Phase Particles Tensile Properties Thermomechanical Treatment Icosahedral Phase Quasi-crystal Rare-earths Behavior Superplasticity
URL	查看原文
WOS记录号	WOS:000242901200033
引用统计	被引频次：149[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/321006/33949
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. K. Xu,L. Liu,Y. B. Xu,et al. Effect of microstructure and texture on the mechanical properties of the as-extruded Mg-Zn-Y-Zr alloys[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2007,443(1-2):248-256.
APA	D. K. Xu,L. Liu,Y. B. Xu,&E. H. Han.(2007).Effect of microstructure and texture on the mechanical properties of the as-extruded Mg-Zn-Y-Zr alloys.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,443(1-2),248-256.
MLA	D. K. Xu,et al."Effect of microstructure and texture on the mechanical properties of the as-extruded Mg-Zn-Y-Zr alloys".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 443.1-2(2007):248-256.