Transition from ductilizing to hardening in tungsten: The dependence on rhenium distribution
文献类型：期刊论文
| 作者 | Li, Yu-Hao1,2; Zhou, Hong-Bo1,2; Liang, Linyun1,2; Gao, Ning3; Deng, Huiqiu4; Gao, Fei5; Lu, Gang6; Lu, Guang-Hong1,2 |
| 刊名 | ACTA MATERIALIA
 |
| 出版日期 | 2019-12-01 |
| 卷号 | 181页码:110-123 |
| 关键词 | Screw dislocation motion Ductilizing and hardening Distribution Tungsten-rhenium alloys |
| ISSN号 | 1359-6454 |
| DOI | 10.1016/j.actamat.2019.09.035 |
| 通讯作者 | Zhou, Hong-Bo(hbzhou@buaa.edu.cn) |
| 英文摘要 | Mechanical responses of tungsten (W) and its alloys are strongly controlled by the properties of 1/2<111> screw dislocations. Rhenium (Re), as a typical alloying and transmutation element in W, can substantially modify the properties of the dislocations, thus the plasticity of the materials. In this study, we investigate the interaction of Re and Re clusters with the screw dislocations in W by first-principles calculations in combination with theoretical models. Specifically, we propose two competing and Re-distribution dependent mechanisms, i.e. "ductilizing effect" and "hardening effect"; both are crucial to the mechanical properties of W. For the ductilizing effect, dispersed Re atoms weaken the surrounding interatomic interaction and reduce the shear resistance, thus facilitating the motion of the dislocation. In contrast, for the hardening effect, Re clusters formed by aggregated Re atoms due to irradiation can increase the Peierls stress and energy, thus hindering the motion of the dislocations. The proposed mechanisms shed light on the experimental observations that there is a Re-induced transition from ductilizing to hardening due to irradiation. The current work provides a theoretical guidance to the development of W-based future fusion materials in search of ductilizing alloying elements. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| WOS关键词 | AB-INITIO CALCULATIONS ; ATOM-PROBE TOMOGRAPHY ; 111 SCREW DISLOCATION ; NEUTRON-IRRADIATION ; MICROSTRUCTURAL DEVELOPMENT ; CORE-STRUCTURE ; W-RE ; TRANSMUTATION ELEMENTS ; ALPHA-IRON ; COMPUTER-SIMULATION |
| 资助项目 | National Natural Science Foundation of China[11675011] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000498749300010 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://119.78.100.186/handle/113462/141199]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Zhou, Hong-Bo |
| 作者单位 | 1.Beihang Univ, Dept Phys, Beijing 100191, Peoples R China 2.Beihang Univ, Beijing Key Lab Adv Nucl Mat & Phys, Beijing 100191, Peoples R China 3.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China 4.Hunan Univ, Sch Phys & Elect, Dept Appl Phys, Changsha 410082, Hunan, Peoples R China 5.Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA 6.Calif State Univ Northridge, Dept Phys & Astron, Northridge, CA 91330 USA |
| 推荐引用方式 GB/T 7714 | Li, Yu-Hao,Zhou, Hong-Bo,Liang, Linyun,et al. Transition from ductilizing to hardening in tungsten: The dependence on rhenium distribution[J]. ACTA MATERIALIA,2019,181:110-123. |
| APA | Li, Yu-Hao.,Zhou, Hong-Bo.,Liang, Linyun.,Gao, Ning.,Deng, Huiqiu.,...&Lu, Guang-Hong.(2019).Transition from ductilizing to hardening in tungsten: The dependence on rhenium distribution.ACTA MATERIALIA,181,110-123. |
| MLA | Li, Yu-Hao,et al."Transition from ductilizing to hardening in tungsten: The dependence on rhenium distribution".ACTA MATERIALIA 181(2019):110-123. |
入库方式： OAI收割
来源：近代物理研究所
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