Strain rate-dependent shear band behavior in bulk metallic glasses | |
Jiang MQ(蒋敏强); Dai LH(戴兰宏); Dai LH | |
会议录名称 | DYMAT 2009: 9TH INTERNATIONAL CONFERENCE ON THE MECHANICAL AND PHYSICAL BEHAVIOUR OF MATERIALS UNDER DYNAMIC LOADING, VOL 2 |
2009 | |
页码 | 993-998 |
会议名称 | 9th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading |
会议日期 | SEP 07-11, 2009 |
会议地点 | Brussels, BELGIUM |
摘要 | In this article, we review our recent advances in understanding the deformation behavior of a typical tough Zr41.2Ti13.8Cu12.5Ni10Be22.5 (Vit 1) bulk metallic glass (BMG), as a model material, under various loading modes and strain rates, focusing particularly on the rate-dependence and formation mechanism of shear-banding. Dynamic and quasi-static mechanical experiments, including plate shear, shear punch and spherical indentation, and continuum as well as atomistic modeling on shear-banding are discussed. The results demonstrate that higher strain rate slows down the annihilation process of free volume, but promotes the free-volume coalescence, which is responsible for the rate-dependent shear banding. The physical origin of shear bands, that is the free volume softening underpinned by irreversible rearrangements of atoms, is unveiled. Finally, some concluding remarks are given. |
关键词 | Serrated Plastic-flow Amorphous-alloys Inhomogeneous Deformation Nanoindentation Instability Dynamics Fracture |
ISBN号 | 978-2-7598-0473-3 |
URL | 查看原文 |
语种 | 英语 |
文献类型 | 会议论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/44346 |
专题 | 非线性力学国家重点实验室 |
通讯作者 | Dai LH |
推荐引用方式 GB/T 7714 | Jiang MQ,Dai LH,Dai LH. Strain rate-dependent shear band behavior in bulk metallic glasses[C]DYMAT 2009: 9TH INTERNATIONAL CONFERENCE ON THE MECHANICAL AND PHYSICAL BEHAVIOUR OF MATERIALS UNDER DYNAMIC LOADING, VOL 2,2009:993-998. |
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