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Macroscopic tensile plasticity of bulk metallic glass through designed artificial defects
文献类型：期刊论文
| 作者 | R. T. Qu ; J. X. Zhao ; M. Stoica ; J. Eckert ; Z. F. Zhang |
| 刊名 | Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
 |
| 出版日期 | 2012 |
| 卷号 | 534页码:365-373 |
| ISSN号 | 0921-5093 |
| 关键词 | Bulk metallic glass Tensile plasticity Strength Notch Shear band amorphous-alloys room-temperature shear bands mechanical-properties enhanced plasticity matrix composites fracture toughness ductility stress |
| 中文摘要 | Catastrophic fracture with nearly zero tensile elongation at room temperature in bulk metallic glasses (BMGs) makes their future application as structural materials seem bleak. The instable localized shear banding with "work softening" under unconfined uniaxial tension should be responsible for the zero elongation. Here we show how to control the shear band and make it contribute to the macroscopic tensile plasticity of BMGs through designed artificial defects. By promoting the initiation of shear bands and hindering their instable propagation through introducing artificial defects, appreciable macroscopic tensile plasticity was successfully achieved in a conventional Zr-based BMG. Moreover, by designing the distribution of the defects to inhibit the intrinsic shear fracture, the nominal tensile strength and elongation of the BMG have been enhanced simultaneously. The principles for toughening BMG through designed artificial defects are proposed; accordingly, some strategies for designing future porous BMG materials with high mechanical performance were presented. (C) 2011 Elsevier B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2013-02-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/60199]  |
| 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 | R. T. Qu,J. X. Zhao,M. Stoica,et al. Macroscopic tensile plasticity of bulk metallic glass through designed artificial defects[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2012,534:365-373. |
| APA | R. T. Qu,J. X. Zhao,M. Stoica,J. Eckert,&Z. F. Zhang.(2012).Macroscopic tensile plasticity of bulk metallic glass through designed artificial defects.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,534,365-373. |
| MLA | R. T. Qu,et al."Macroscopic tensile plasticity of bulk metallic glass through designed artificial defects".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 534(2012):365-373. |
入库方式： OAI收割
来源：金属研究所
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