Shear transformation zone volume determining ductile–brittle transition of bulk metallic glasses
文献类型：期刊论文
| 作者 | Jiang F; Jiang MQ(蒋敏强) ; Wang HF; Zhao YL; He L; Sun J
|
| 刊名 | Acta Materialia
 |
| 出版日期 | 2011 |
| 卷号 | 59期号:5页码:2057-2068 |
| 通讯作者邮箱 | junsun@mail.xjtu.edu.cn |
| 关键词 | Bulk metallic glass Shear transformation zone Tension transformation zone Free volume Ductile-to-brittle transition |
| ISSN号 | 1359-6454 |
| 通讯作者 | J. Sun |
| 合作状况 | 国内 |
| 中文摘要 | Three-point bending experiments were performed on as-cast and annealed samples of Zr52.5Cu17.9Ni14.6Al10Ti5 (Vit105) bulk metallic glasses over a wide range of temperatures varying from room temperature (293 K) to liquid nitrogen temperature (77 K). The results demonstrated that the free volume decrease due to annealing and/or cryogenic temperature can reduce the propensity for the formation of multiple shear bands and hence deteriorate plastic deformation ability. We clearly observed a sharp ductile-to-brittle transition (DBT), across which microscopic fracture feature transfers from micro-scale vein patterns to nano-scale periodic corrugations. Macroscopically, the corresponding fracture mode changes from ductile shear fracture to brittle tensile fracture. The shear transformation zone volume, taking into account free volume, temperature and strain rate, is proposed to quantitatively characterize the DBT behavior in fracture of metallic glasses. |
| 学科主题 | 新型材料的力学问题;; |
| 分类号 | 一类 |
| 收录类别 | SCI ; EI |
| 原文出处 | http://dx.doi.org/10.1016/j.actamat.2010.12.006 |
| 语种 | 英语 |
| WOS记录号 | WOS:000287775400020 |
| 公开日期 | 2011-03-18 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/43313]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Jiang F,Jiang MQ,Wang HF,et al. Shear transformation zone volume determining ductile–brittle transition of bulk metallic glasses[J]. Acta Materialia,2011,59(5):2057-2068. |
| APA | Jiang F,Jiang MQ,Wang HF,Zhao YL,He L,&Sun J.(2011).Shear transformation zone volume determining ductile–brittle transition of bulk metallic glasses.Acta Materialia,59(5),2057-2068. |
| MLA | Jiang F,et al."Shear transformation zone volume determining ductile–brittle transition of bulk metallic glasses".Acta Materialia 59.5(2011):2057-2068. |
入库方式： OAI收割
来源：力学研究所
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