Incipient plasticity and activation volume of dislocation nucleation for TiZrNbTaMo high-entropy alloys characterized by nanoindentation
文献类型：期刊论文
| 作者 | Wang, Shao-Ping1,2; Xu, Jian1 |
| 刊名 | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2019-05-01 |
| 卷号 | 35期号:5页码:812-816 |
| 关键词 | High-entropy alloys Nanoindentation Refractory metals BCC phase Incipient plasticity |
| ISSN号 | 1005-0302 |
| DOI | 10.1016/j.jmst.2018.11.014 |
| 通讯作者 | Xu, Jian(jianxu@imr.ac.cn) |
| 英文摘要 | With instrumented nanoindentation, incipient plasticity of two as-cast BCC TiZrNbTa and TiZrNbTaMo high-entropy alloys (HEAs) are investigated in terms of pop-in events during loading, to characterize the dislocation behavior in these solid-solution alloys. It is shown that the maximum shear stress (tau(max)) required for dislocation nucleation is determined to be 1/16-1/12 and 1/18-1/14 of shear modulus for the TiZrNbTa and TiZrNbTaMo HEAs, respectively, which is nearly comparative to the theoretical shear stress of these alloys. The activation volumes of dislocation nucleation the TiZrNbTa and TiZrNbTaMo HEAs are determined to be 1.2b(3) for and 1.3b(3), respectively, which is substantially irrespective of alloying with Mo. Furthermore, activation volumes of these two HEAs are on the order of cubic burger's vector and only one-third of the value for TiZrHfNb HEA, suggesting that a heterogeneous nucleation of dislocation took place in a way of direct atom-vacancy exchange, rather than of the cooperative motion of several atoms. These findings reveal the unique feature in deformation of BCC solid-solution complex alloys. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| 资助项目 | National Natural Science Foundation of China[51571192] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000460640200014 |
| 出版者 | JOURNAL MATER SCI TECHNOL |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/132375]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Xu, Jian |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 2.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Shao-Ping,Xu, Jian. Incipient plasticity and activation volume of dislocation nucleation for TiZrNbTaMo high-entropy alloys characterized by nanoindentation[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2019,35(5):812-816. |
| APA | Wang, Shao-Ping,&Xu, Jian.(2019).Incipient plasticity and activation volume of dislocation nucleation for TiZrNbTaMo high-entropy alloys characterized by nanoindentation.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,35(5),812-816. |
| MLA | Wang, Shao-Ping,et al."Incipient plasticity and activation volume of dislocation nucleation for TiZrNbTaMo high-entropy alloys characterized by nanoindentation".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 35.5(2019):812-816. |
入库方式： OAI收割
来源：金属研究所
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