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(魏宇杰); Lei XQ(雷现奇); Huo LS; Wang WH; Greer AL; 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.
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2013-01-10
卷号	560 页码:510-517
ISSN	0921-5093
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.
关键词	Bending Test Metallic Glasses Micromechanical Modelling Plastic Deformation Shear Bands
学科领域	固体力学
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000313155400060
项目资助者	Chinese Academy of Sciences; NSF of China [11021262, 50921091]; MOST 973 of China [2012CB937500, 2010CB731603]; EPSRC
课题组名称	LNM微结构计算力学（筹）
论文分区	一类
引用统计	被引频次：26[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/47029
专题	非线性力学国家重点实验室
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.
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,2013,560:510-517.
APA	Wei YJ,Lei XQ,Huo LS,Wang WH,Greer AL,&Wei, YJ .(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,560,510-517.
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):510-517.

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