Significantly improved strength and plasticity of a refractory high-entropy alloy at small length scale
文献类型：期刊论文
| 作者 | Qu, Ruitao3; Wu, Shaojie2; Volkert, Cynthia A.1; Zhang, Zhefeng2; Liu, Feng3 |
| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 出版日期 | 2023-03-03 |
| 卷号 | 867页码:8 |
| 关键词 | Refractory high-entropy alloy Size effect Strength Plasticity Fracture |
| ISSN号 | 0921-5093 |
| DOI | 10.1016/j.msea.2023.144729 |
| 通讯作者 | Qu, Ruitao(rtqu@nwpu.edu.cn) ; Zhang, Zhefeng(zhfzhang@imr.ac.cn) ; Liu, Feng(liufeng@nwpu.edu.cn) |
| 英文摘要 | Refractory high-entropy alloy (RHEA) VNbMoTaW exhibits remarkably high strength in a much wide temperature range, whereas the brittle fracture behavior limits the applications. Here we show a significant size effect on the strength, plasticity and fracture behaviour of the VNbMoTaW RHEA. As sample size goes from millimeter to sub-micrometer scale, the brittle cracking behavior of the RHEA is greatly suppressed, along with a simultaneous enhancement of strength and plasticity. The improved mechanical properties can be attributed to the disappearance of crack initiation sites, the size-dependent dislocation plasticity at small length scale and the sizedependent competition in thermodynamics driving-force for cleavage cracking and plastic yielding. The results imply a promising potential of the RHEA for making microscale devices with high temperature environment. |
| 资助项目 | National Natural Science Foundation of China (NSFC)[2021-TS-10] ; Research Fund of the State Key Laboratory of Solidification Processing, NPU, China ; Start-up Program by Northwestern Polytechnical University ; [52271072] |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001054121400001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Natural Science Foundation of China (NSFC) ; Research Fund of the State Key Laboratory of Solidification Processing, NPU, China ; Start-up Program by Northwestern Polytechnical University |
| 源URL | [http://ir.imr.ac.cn/handle/321006/179053]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Qu, Ruitao; Zhang, Zhefeng; Liu, Feng |
| 作者单位 | 1.Univ Gottingen, Inst Mat Phys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany 2.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 3.Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, 127 West Youyi Rd, Xian 710072, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qu, Ruitao,Wu, Shaojie,Volkert, Cynthia A.,et al. Significantly improved strength and plasticity of a refractory high-entropy alloy at small length scale[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2023,867:8. |
| APA | Qu, Ruitao,Wu, Shaojie,Volkert, Cynthia A.,Zhang, Zhefeng,&Liu, Feng.(2023).Significantly improved strength and plasticity of a refractory high-entropy alloy at small length scale.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,867,8. |
| MLA | Qu, Ruitao,et al."Significantly improved strength and plasticity of a refractory high-entropy alloy at small length scale".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 867(2023):8. |
入库方式： OAI收割
来源：金属研究所
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