Towards more uniform deformation in metallic glasses: The role of Poisson's ratio

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	Towards more uniform deformation in metallic glasses: The role of Poisson's ratio
	Wei, YJ ; Lei, XQ ; Huo, LS ; Wang, WH ; Greer, AL
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2013
卷号	560 页码:510
关键词	Bending test Metallic glasses Micromechanical modelling Plastic deformation Shear bands
ISSN号	0921-5093
通讯作者	Wei, YJ (reprint author), Chinese Acad Sci, LNM, Inst Mech, State Key Lab Nonlinear Mech, Bei Si Huan Xi Rd 15, Beijing 100190, Peoples R China.
中文摘要	We develop a quantitative analysis of how the plastic deformation in a metallic glass is more uniform if its Poisson ratio v is higher. The plasticity of metallic glasses under ambient conditions is mediated by shear localized in thin bands, and can be characterized by experiments on the bending of thin plates. We extend the analysis by Conner et al. (Conner et al., J. AppL Phys. 94 (2003), 904-911) of bands in bent plates to include the micromechanics of individual shear bands. Expressions are derived for the shear-band spacing and the offset on each band. Both these quantities are predicted to decrease as v is increased. The predictions are tested against measurements on metallic glasses with a wide range of v. Good agreement is found, supporting the new model for the shear-band spacing, and pointing the way towards more diffuse deformation, and consequently improved plasticity and toughness, of metallic glasses as v increases toward the limiting value of 0.5. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.
资助信息	Chinese Academy of Sciences; NSF of China [11021262, 50921091]; MOST 973 of China [2012CB937500, 2010CB731603]; EPSRC
语种	英语
公开日期	2014-01-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57616]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Wei, YJ,Lei, XQ,Huo, LS,et al. Towards more uniform deformation in metallic glasses: The role of Poisson's ratio[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2013,560:510.
APA	Wei, YJ,Lei, XQ,Huo, LS,Wang, WH,&Greer, AL.(2013).Towards more uniform deformation in metallic glasses: The role of Poisson's ratio.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,560,510.
MLA	Wei, YJ,et al."Towards more uniform deformation in metallic glasses: The role of Poisson's ratio".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 560(2013):510.