Size-dependent shear fracture and global tensile plasticity of metallic glasses
文献类型：期刊论文
| 作者 | F. F. Wu ; Z. F. Zhang ; S. X. Mao |
| 刊名 | Acta Materialia
 |
| 出版日期 | 2009 |
| 卷号 | 57期号:1页码:257-266 |
| 关键词 | Metallic glasses Shear band Plastic deformation Tensile plasticity Critical shear offset bulk amorphous-alloys compressive properties mechanical-properties forming ability aspect ratio bands deformation ductility behavior fragmentation |
| ISSN号 | 1359-6454 |
| 中文摘要 | The tensile ductility or brittleness of metallic glasses is found to depend strongly oil the critical shear offset. Based oil experimental observations, the tensile shear fracture processes of metallic glasses can be divided into three stages: multiplication and coalescence of the free volume, formation of void and the final fast propagation of a shear crack. Accordingly, the size effect on the tensile shear deformation processes of metallic glass can be well understood: with decreasing specimen size smaller than the equivalent critical shear offset, the shear deformation of metallic glass is changed from unstable to stable, which leads to a transition from global brittleness on the macroscale to large global plasticity or even necking oil the microscale. These results are fundamentally useful in understanding the physical nature of tensile shear deformation of various metallic glasses and even in the design of new metallic glass materials with good plasticity. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/32421]  |
| 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 | F. F. Wu,Z. F. Zhang,S. X. Mao. Size-dependent shear fracture and global tensile plasticity of metallic glasses[J]. Acta Materialia,2009,57(1):257-266. |
| APA | F. F. Wu,Z. F. Zhang,&S. X. Mao.(2009).Size-dependent shear fracture and global tensile plasticity of metallic glasses.Acta Materialia,57(1),257-266. |
| MLA | F. F. Wu,et al."Size-dependent shear fracture and global tensile plasticity of metallic glasses".Acta Materialia 57.1(2009):257-266. |
入库方式： OAI收割
来源：金属研究所
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