| Enhanced strength-ductility synergy via high dislocation density-induced strain hardening in nitrogen interstitial CrMnFeCoNi high-entropy alloy | |
| Li, Huabing1; Han, Yu1; Feng, Hao1; Zhou, Gang2; Jiang, Zhouhua1; Cai, Minghui3; Li, Yizhuang4; Huang, Mingxin4 | |
| Corresponding Author | Li, Huabing(lihb@smm.neu.edu.cn) ; Zhou, Gang(gzhou@imr.ac.cn) |
| 2023-04-01 | |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| ISSN | 1005-0302 |
| Volume | 141Pages:184-192 |
| Abstract | The present work demonstrates that nitrogen doping inhibits the formation of deformation twins in a CrMnFeCoNi high entropy alloy, while significantly increases the strength without sacrificing much duc-tility at 77 K. Microstructural characterization and first-principles calculations were employed to unveil the role of interstitial nitrogen atoms in obtaining such an excellent combination of strength and ductility at 77 K. It is found that nitrogen addition increases generalized stacking fault energy (GSFE) and reduces twinning. However, the pinning of dislocations by nitrogen atoms effectively suppresses dislocation cross -slip and dynamic recovery and in turn, promotes the accumulation of dislocations. The high dislocation density induces a high strain hardening capacity and improves uniform elongation, which compensates for the ductility loss accompanied by solid solution strengthening. The effect of nitrogen doping enriches the design concept of high-and medium-entropy alloys, providing an economical and effective strategy to develop ultra-high-performance alloys that are suitable for cryogenic applications.(c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| Keyword | High-entropy alloy Interstitials Mechanical properties First-principles calculations Stacking fault energy |
| Funding Organization | National Natural Science Foundation of China ; Talent Project of Revitalizing Liaoning ; China National Postdoctoral Program for Innovative Talents ; Fundamental Research Funds for the Central Universities ; Key Research and Development Program of LvLiang ; National Super-computing Center in Zhengzhou ; LvLiang Cloud Computing Center of TianHe-2 of China |
| DOI | 10.1016/j.jmst.2022.09.020 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[U1960203] ; National Natural Science Foundation of China[52004060] ; National Natural Science Foundation of China[52101025] ; Talent Project of Revitalizing Liaoning[XLYC1902046] ; China National Postdoctoral Program for Innovative Talents[BX20200076] ; Fundamental Research Funds for the Central Universities[N2125017] ; Fundamental Research Funds for the Central Universities[N2002004] ; Key Research and Development Program of LvLiang[219114] ; National Super-computing Center in Zhengzhou ; LvLiang Cloud Computing Center of TianHe-2 of China |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000892646700002 |
| Publisher | JOURNAL MATER SCI TECHNOL |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/175972 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Li, Huabing; Zhou, Gang |
| Affiliation | 1.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 3.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China 4.Univ Hong Kong, Dept Mech Engn, Pokfulam Rd, Hong Kong 999077, Peoples R China |
| Recommended Citation GB/T 7714 | Li, Huabing,Han, Yu,Feng, Hao,et al. Enhanced strength-ductility synergy via high dislocation density-induced strain hardening in nitrogen interstitial CrMnFeCoNi high-entropy alloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2023,141:184-192. |
| APA | Li, Huabing.,Han, Yu.,Feng, Hao.,Zhou, Gang.,Jiang, Zhouhua.,...&Huang, Mingxin.(2023).Enhanced strength-ductility synergy via high dislocation density-induced strain hardening in nitrogen interstitial CrMnFeCoNi high-entropy alloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,141,184-192. |
| MLA | Li, Huabing,et al."Enhanced strength-ductility synergy via high dislocation density-induced strain hardening in nitrogen interstitial CrMnFeCoNi high-entropy alloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 141(2023):184-192. |
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