Enhanced strength-ductility synergy via high dislocation density-induced strain hardening in nitrogen interstitial CrMnFeCoNi high-entropy alloy

doi:10.1016/j.jmst.2022.09.020

IMR OpenIR

	Enhanced strength-ductility synergy via high dislocation density-induced strain hardening in nitrogen interstitial CrMnFeCoNi high-entropy alloy
	Li, Huabing 1; Han, Yu 1; Feng, Hao 1; Zhou, Gang 2; Jiang, Zhouhua 1; Cai, Minghui 3; Li, Yizhuang 4; Huang, Mingxin 4
通讯作者	Li, Huabing(lihb@smm.neu.edu.cn) ; Zhou, Gang(gzhou@imr.ac.cn)
	2023-04-01
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	141 页码:184-192
摘要	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.
关键词	High-entropy alloy Interstitials Mechanical properties First-principles calculations Stacking fault energy
资助者	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
收录类别	SCI
语种	英语
资助项目	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研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000892646700002
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：49[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/175972
专题	中国科学院金属研究所
通讯作者	Li, Huabing; Zhou, Gang
作者单位	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
推荐引用方式 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.