High strain-rate behavior and deformation mechanism of a multi-layer composite textured AZ31B Mg alloy plate
文献类型：期刊论文
| 作者 | Zhang WG; Liu S; Li K; Li PJ; Qi JF; Wang Z; Chen Y ; Zhang HS(张虎生); Meng L
|
| 刊名 | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| 出版日期 | 2018-06-15 |
| 卷号 | 749页码:23-39 |
| ISSN号 | 0925-8388 |
| 关键词 | Az31 b Mg Alloy Multi-layer Composite Textures High Strain Rate Twinning And Slip Energy Absorption Capacity |
| DOI | 10.1016/j.jallcom.2018.03.258 |
| 文献子类 | Article |
| 英文摘要 | There are currently very few studies on the high strain-rate properties of Mg alloys with multi-layer composite textures under dynamic loading. In present study, a multi-layer composite textured AZ31B Mg alloy plate was fabricated using the asymmetric twin-roll casting process. The high strain-rate (similar to 10(3) s(-1)) deformation behaviors of the AZ31B plate along the normal direction (ND) were investigated using split-Hopkinson pressure bar technique. The microstructural evolution and deformation mechanism were analyzed by optical microscopy, scanning electron microscopy, X-ray diffraction, and transmission electron microscopy methods. The experimental results show that the mechanical behaviors exhibit a power-law hardening response under high strain-rate deformation. The flow stress generally increases with increasing strain rate, whereas the strain-hardening rate decreases with increasing strain. An interesting feature is that the maximum flow stress at high strain rates is much lower than that at its corresponding quasi-static counterpart. Microstructure analysis demonstrates that the characteristic layered texture and microstructure along the ND determine its mechanical behavior. The plastic deformation is mainly controlled by the basal-type texture, where the predominant deformation mechanism is dislocation slip. Dynamic recrystallization (DRX) occurred unevenly in the material during dynamic deformation, resulting in a moderate increase in ductility. The fracture behaviors change from brittle fracture to ductile fracture as the strain rate increases. The energy absorption capacity is therefore enhanced due to the occurrence of both DRX and the brittle-ductile transition at high strain rates. (C) 2018 Elsevier B.V. All rights reserved. |
| 分类号 | 一类 |
| WOS关键词 | MAGNESIUM ALLOY ; MICROSTRUCTURAL EVOLUTION ; DYNAMIC DEFORMATION ; PURE MAGNESIUM ; GRAIN-SIZE ; SHEET ; COMPRESSION ; TEMPERATURES ; MG-3AL-1ZN ; ANISOTROPY |
| WOS研究方向 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000432666200003 |
| 资助机构 | National Natural Science Foundation of China (NSFC)(51471090) |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/77502]  |
| 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 | Zhang WG,Liu S,Li K,et al. High strain-rate behavior and deformation mechanism of a multi-layer composite textured AZ31B Mg alloy plate[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,749:23-39. |
| APA | Zhang WG.,Liu S.,Li K.,Li PJ.,Qi JF.,...&Meng L.(2018).High strain-rate behavior and deformation mechanism of a multi-layer composite textured AZ31B Mg alloy plate.JOURNAL OF ALLOYS AND COMPOUNDS,749,23-39. |
| MLA | Zhang WG,et al."High strain-rate behavior and deformation mechanism of a multi-layer composite textured AZ31B Mg alloy plate".JOURNAL OF ALLOYS AND COMPOUNDS 749(2018):23-39. |
入库方式： OAI收割
来源：力学研究所
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