Achieving a High-Strength CoCrFeNiCu High-Entropy Alloy with an Ultrafine-Grained Structure via Friction Stir Processing
文献类型：期刊论文
| 作者 | CunLei Jia1; ZhiWei Wang1; LiHui Wu1; DingRui Ni1; ZhengKun Li1; HuaMeng Fu1; Peng Xue1; BoLv Xiao1; ZongYi Ma1; Yi Shao2 |
| 刊名 | 金属学报:英文版
 |
| 出版日期 | 2020 |
| 卷号 | 33.0期号:007页码:947-956 |
| 关键词 | grain microstructure deformation |
| ISSN号 | 1006-7191 |
| 英文摘要 | High-entropy alloys(HEAs) are a new class of materials with a potential engineering application,but how to obtain ultrafine or nano-sized crystal structures of HEAs has been a challenge.Here,we first presented an equiatomic CoCrFeNiCu HEA with excellent mechanical properties obtained via friction stir processing(FSP).After FSP,the Cu element segregation in the cast CoCrFeNiCu HEA was almost eliminated,and the cast coarse two-phase structure(several micrometers) was changed into an ultrafine-grained single-phase structure(150 nm) with a large fraction of high-angle grain boundaries and nanoscale deformation twins.This unique microstructure was mainly attributed to the severe plastic deformation during FSP,and the sluggish diffusion effect in dynamics and the lattice distortion effect in crystallography for HEAs.Furthermore,FSP largely improved the hardness and yield strength of the CoCrFeNiCu HEA with a value of 380 HV and more than 1150 MPa,respectively,which were> 1.5 times higher than those of the base material.The great strengthening after FSP was mainly attributed to the significant grain refinement with large lattice distortion and nano-twins.This study provides a new method to largely refine the microstructure and improve the strength of cast CoCrFeNiCu HEAs. |
| 语种 | 中文 |
| CSCD记录号 | CSCD:6755373 |
| WOS记录号 | WOS:000538493700005 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/89936]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 1.中国科学院金属研究所 2.School of Material Science and Engineering,Shenyang University of Technology |
| 推荐引用方式 GB/T 7714 | CunLei Jia,ZhiWei Wang,LiHui Wu,et al. Achieving a High-Strength CoCrFeNiCu High-Entropy Alloy with an Ultrafine-Grained Structure via Friction Stir Processing[J]. 金属学报:英文版,2020,33.0(007):947-956. |
| APA | CunLei Jia.,ZhiWei Wang.,LiHui Wu.,DingRui Ni.,ZhengKun Li.,...&YunLong Chang.(2020).Achieving a High-Strength CoCrFeNiCu High-Entropy Alloy with an Ultrafine-Grained Structure via Friction Stir Processing.金属学报:英文版,33.0(007),947-956. |
| MLA | CunLei Jia,et al."Achieving a High-Strength CoCrFeNiCu High-Entropy Alloy with an Ultrafine-Grained Structure via Friction Stir Processing".金属学报:英文版 33.0.007(2020):947-956. |
入库方式： OAI收割
来源：金属研究所
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