Simultaneous improvement of strength and ductility in a P-doped CrCoNi medium-entropy alloy
文献类型：期刊论文
| 作者 | Zhang, Hangzhou2,3 ; Sun, Guoqiang1; Yang, Muxin2,3; Yuan, Fuping2,3; Wu, Xiaolei2,3; Wu XL(武晓雷); Yuan FP(袁福平); Yang MX(杨沐鑫); Zhang HZ(张杭州); Wu XL(武晓雷)
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| 刊名 | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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| 出版日期 | 2025-02-20 |
| 卷号 | 209页码:128-138 |
| 关键词 | Tensile ductility Dynamic grain refinement Stacking fault energy Strain hardening Phosphorus segregation |
| ISSN号 | 1005-0302 |
| DOI | 10.1016/j.jmst.2024.05.020 |
| 通讯作者 | Yang, Muxin(mxyang@lnm.imech.ac.cn) |
| 英文摘要 | A newly developed P-doped CrCoNi medium-entropy alloy (MEA) provides both higher yield strength and larger uniform elongation than the conventional CrCoNi MEA, even superior tensile ductility to the otherelement-doped CrCoNi MEAs at similar yield strength levels. P segregation at grain boundaries (GBs) and dissolution inside grain interiors, together with the related lower stacking fault energy (SFE) are found in the P-doped CrCoNi MEA. Higher hetero-deformation-induced (HDI) hardening rate is observed in the Pdoped CrCoNi MEA due to the grain -to -grain plastic deformation and the dynamic structural refinement by high-density stacking fault-walls (SFWs). The enhanced yield strength in the P-doped CoCrNi MEA can be attributed to the strong substitutional solid -solution strengthening by severer lattice distortion and the GB strengthening by phosphorus segregation at GBs. During the tensile deformation, the multiple SFW frames inundated with massive multi-orientational tiny planar stacking faults (SFs) between them, rather than deformation twins, are observed to induce dynamic structural refinement for forming parallelepiped domains in the P-doped CoCrNi MEA, due to the lower SFE and even lower atomically-local SFE. These nano-sized domains with domain boundary spacing at tens of nanometers can block dislocation movement for strengthening on one hand, and can accumulate defects in the interiors of domains for exceptionally high hardening rate on the other hand. (c) 2024 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| WOS关键词 | STACKING-FAULT ENERGY ; MECHANICAL-PROPERTIES ; DEFORMATION ; TEMPERATURE ; STRESS ; MICROSTRUCTURE ; PHOSPHORUS ; DEPENDENCE ; STABILITY ; EVOLUTION |
| 资助项目 | National Key R&D Program of China[2019YFA0209902] ; Natural Science Foundation of China[52071326] ; Natural Science Foundation of China[52192593] ; Natural Science Foundation of China[51601204] ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics[11988102] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001251642900001 |
| 资助机构 | National Key R&D Program of China ; Natural Science Foundation of China ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics ; Strategic Priority Research Program of the Chinese Academy of Sciences |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/95790]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 通讯作者 | Yang, Muxin |
| 作者单位 | 1.Cent Iron & Steel Res Inst, Dept Struct Steels, Beijing 100081, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Hangzhou,Sun, Guoqiang,Yang, Muxin,et al. Simultaneous improvement of strength and ductility in a P-doped CrCoNi medium-entropy alloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2025,209:128-138. |
| APA | Zhang, Hangzhou.,Sun, Guoqiang.,Yang, Muxin.,Yuan, Fuping.,Wu, Xiaolei.,...&Yang MX.(2025).Simultaneous improvement of strength and ductility in a P-doped CrCoNi medium-entropy alloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,209,128-138. |
| MLA | Zhang, Hangzhou,et al."Simultaneous improvement of strength and ductility in a P-doped CrCoNi medium-entropy alloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 209(2025):128-138. |
入库方式： OAI收割
来源：力学研究所
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