Enhancing strength and ductility of Mg-12Gd-3Y-0.5Zr alloy by forming a bi-ultrafine microstructure

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	Enhancing strength and ductility of Mg-12Gd-3Y-0.5Zr alloy by forming a bi-ultrafine microstructure
	H. J. Yang ; X. H. An ; X. H. Shao ; X. M. Yang ; S. X. Li ; S. D. Wu ; Z. F. Zhang
刊名	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
	2011
卷号	528 期号:13-14 页码:4300-4311
关键词	Mg alloy Equal channel angular pressing (ECAP) Strength Ductility Shear bands Second-phase particles severe plastic-deformation high-pressure torsion cu-al alloys grain-refinement mechanical-properties magnesium alloys nanostructured metal tensile strain shear
ISSN号	0921-5093
中文摘要	By means of equal channel angular pressing (ECAP) technique, an Mg-12Gd-3Y-0.5Zr alloy was processed at 300 degrees C for one and four passes. A bi-ultrafine (BU) microstructure of Mg-alloy, consisting of matrix grains and the second-phase particles with sizes smaller than 1 mu m, was obtained after the fourth pass of ECAP. The formation of this BU microstructure originated from the complex interactions between the matrix grains and second-phase particles during the ECAP processing at elevated temperature. A simultaneous improvement of both strength and ductility was achieved in the sample with the BU microstructure, compared with the original sample. The increase in strength is resulted from the refinement of both matrix grains and second-phase particles, while the improved ductility is attributed to the considerable plasticity provided by both dislocation mechanism and profuse shear bands in the BU microstructure. An enhanced plasticity induced by the shear-band mechanism is proposed for the magnesium alloy with the BU microstructure. (C) 2011 Elsevier B.V. All rights reserved.
原文出处	://WOS:000290004200004
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/30820]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	H. J. Yang,X. H. An,X. H. Shao,et al. Enhancing strength and ductility of Mg-12Gd-3Y-0.5Zr alloy by forming a bi-ultrafine microstructure[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2011,528(13-14):4300-4311.
APA	H. J. Yang.,X. H. An.,X. H. Shao.,X. M. Yang.,S. X. Li.,...&Z. F. Zhang.(2011).Enhancing strength and ductility of Mg-12Gd-3Y-0.5Zr alloy by forming a bi-ultrafine microstructure.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,528(13-14),4300-4311.
MLA	H. J. Yang,et al."Enhancing strength and ductility of Mg-12Gd-3Y-0.5Zr alloy by forming a bi-ultrafine microstructure".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 528.13-14(2011):4300-4311.