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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.
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
2013-01-10
Volume560Pages:510-517
ISSN0921-5093
AbstractWe 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.
KeywordBending Test Metallic Glasses Micromechanical Modelling Plastic Deformation Shear Bands
Subject Area固体力学
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000313155400060
Funding OrganizationChinese Academy of Sciences; NSF of China [11021262, 50921091]; MOST 973 of China [2012CB937500, 2010CB731603]; EPSRC
DepartmentLNM微结构计算力学(筹)
Classification一类
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Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47029
Collection非线性力学国家重点实验室
Corresponding AuthorWei, 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.
Recommended Citation
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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