| 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.
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| Source Publication | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
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| 2013-01-10 | |
| Volume | 560Pages:510-517 |
| ISSN | 0921-5093 |
| Abstract | 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. |
| Keyword | Bending Test Metallic Glasses Micromechanical Modelling Plastic Deformation Shear Bands |
| Subject Area | 固体力学 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000313155400060 |
| Funding Organization | Chinese Academy of Sciences; NSF of China [11021262, 50921091]; MOST 973 of China [2012CB937500, 2010CB731603]; EPSRC |
| Department | LNM微结构计算力学（筹） |
| Classification | 一类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/47029 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | 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. |
| 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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