Plastic deformation capacity obtained by the process of strain delocalization in Hf0.5Nb0.5Ta0.5Ti1.5Zr multi-principal-element alloy
文献类型：期刊论文
| 作者 | He, Jinyan; Ma, Yan; Li, Hongxin; Ma, Shizhou; Zhang, Xinggao; Yuan FP(袁福平) ; Huang, Jacob Chih-Ching
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| 刊名 | INTERMETALLICS
 |
| 出版日期 | 2024 |
| 卷号 | 164页码:8 |
| 关键词 | Multi-principal element alloy Strain delocalization Strain gradient Lattice distortion |
| ISSN号 | 0966-9795 |
| DOI | 10.1016/j.intermet.2023.108119 |
| 通讯作者 | He, Jinyan(hejinyanfhy@163.com) ; Yuan, Fuping(fpyuan@lnm.imech.ac.cn) |
| 英文摘要 | Multi-principal element alloys (MPEAs) with body-centered-cubic (BCC) structures composed of elements of IVB, VB, and VIB usually exhibit high compressive strength and superior high-temperature performance. However, premature necking under tensile loading at ambient temperature limits their applications. Herein, we report the Hf0.5Nb0.5Ta0.5Ti1.5Zr MPEA with a single BCC phase, which performs considerable tensile plasticity by the process of strain delocalization. The formation of dispersed slip bands and two major strain localized regions suppress premature necking. The strain-localized region with a larger strain gradient realized strain delocalization during non-uniform deformation, resulting in considerable tensile plasticity (similar to 20%) with a yield strength of 922 MPa. Two dominated work hardening mechanisms were revealed. One is the geometrically necessary dislocations (GNDs) produced by non-uniform deformation which can coordinate deformation incompatibility, thus enhancing plastic deformation capability. The other is the lattice distortion which can provide an easy path for the cross slip of dislocations and realize strain delocalization. These two kinds of work-hardening mechanisms jointly contribute to the significant plastic deformation capacity of the Hf0.5Nb0.5Ta0.5Ti1.5Zr MPEA. |
| 分类号 | 二类/Q1 |
| WOS关键词 | HIGH-ENTROPY ALLOY ; GRADIENT PLASTICITY ; MICROSTRUCTURE ; DUCTILITY |
| 资助项目 | National Natural Science Foundation of China[52192591] |
| WOS研究方向 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001115639000001 |
| 资助机构 | National Natural Science Foundation of China |
| 其他责任者 | He, Jinyan ; Yuan, Fuping |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/93569]  |
| 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 | He, Jinyan,Ma, Yan,Li, Hongxin,et al. Plastic deformation capacity obtained by the process of strain delocalization in Hf0.5Nb0.5Ta0.5Ti1.5Zr multi-principal-element alloy[J]. INTERMETALLICS,2024,164:8. |
| APA | He, Jinyan.,Ma, Yan.,Li, Hongxin.,Ma, Shizhou.,Zhang, Xinggao.,...&Huang, Jacob Chih-Ching.(2024).Plastic deformation capacity obtained by the process of strain delocalization in Hf0.5Nb0.5Ta0.5Ti1.5Zr multi-principal-element alloy.INTERMETALLICS,164,8. |
| MLA | He, Jinyan,et al."Plastic deformation capacity obtained by the process of strain delocalization in Hf0.5Nb0.5Ta0.5Ti1.5Zr multi-principal-element alloy".INTERMETALLICS 164(2024):8. |
入库方式： OAI收割
来源：力学研究所
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