Achieving dislocation-precipitation strengthening synergy in additively manufactured medium-entropy alloy via cyclic deep cryogenic strategy

doi:10.1016/j.scriptamat.2024.116441

IMR OpenIR

	Achieving dislocation-precipitation strengthening synergy in additively manufactured medium-entropy alloy via cyclic deep cryogenic strategy
	Liu, Bo 1,2; Han, Dong 2; Li, Tianrun 2; Cui, Jingping 2; Zhang, Ziwei 2; Han, Guofeng 3; Wang, Xiaoming 3; Yang, Baijun 2; Wang, Jianqiang 2
通讯作者	Wang, Xiaoming(uwangxm@126.com) ; Yang, Baijun(bjyang@imr.ac.cn) ; Wang, Jianqiang(jqwang@imr.ac.cn)
	2025-02-01
发表期刊	SCRIPTA MATERIALIA
ISSN	1359-6462
卷号	256 页码:7
摘要	A problem has recently been highlighted in the additively manufactured (AMed) L1(2)-strengthened high/mediumentropy alloys (H/MEAs), where the dislocation strengthening effect will be severely weakened due to the inevitable dislocation recovery that occurs during the aging process. To address this, a cyclic deep cryogenic strategy (CDCS) towards the dislocation-precipitation strengthening synergy is proposed. Besides dislocations, this strategy can introduce dense intersecting stacking faults, thus effectively enhancing the thermal stability of dislocations during aging due to the pinning effect of Lomer-Cottrell locking. The existence of these high-density defects further ensures the uniform precipitation of L1(2) phase. Significantly, the CDCS causes a substantial similar to 40% increase in the yield strength of the (CoCrNi)(94)Al3Ti3 MEA sample without compromising the ductility, in which the contribution of dislocation strengthening is doubled. This work provides a pathway for obtaining high-performance AMed H/MEAs, especially L1(2)-strengthened H/MEAs.
关键词	Additive manufacturing Cyclic deep cryogenic strategy High-entropy alloy Dislocation strengthening Strength
资助者	National Key Research & Development Program of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research & Development Plan of Jiangxi Province ; Natural Science Foundation of Liaoning Province ; China Postdoctoral Science Foundation ; Shenyang National Laboratory for Materials Science
DOI	10.1016/j.scriptamat.2024.116441
收录类别	SCI
语种	英语
资助项目	National Key Research & Development Program of China[2022YFF0609002] ; National Natural Science Foundation of China[U1908219] ; National Natural Science Foundation of China[52171163] ; National Natural Science Foundation of China[52271157] ; Key Research Program of the Chinese Academy of Sciences[ZDRW-CN-2021-2-2] ; Key Research & Development Plan of Jiangxi Province[20192ACB80001] ; Natural Science Foundation of Liaoning Province[2022-BS-001] ; China Postdoctoral Science Foundation[2022M713210] ; Shenyang National Laboratory for Materials Science
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001349834500001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/191274
专题	中国科学院金属研究所
通讯作者	Wang, Xiaoming; Yang, Baijun; Wang, Jianqiang
作者单位	1.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Natl key Lab Remfg, Beijing 100072, Peoples R China
推荐引用方式 GB/T 7714	Liu, Bo,Han, Dong,Li, Tianrun,et al. Achieving dislocation-precipitation strengthening synergy in additively manufactured medium-entropy alloy via cyclic deep cryogenic strategy[J]. SCRIPTA MATERIALIA,2025,256:7.
APA	Liu, Bo.,Han, Dong.,Li, Tianrun.,Cui, Jingping.,Zhang, Ziwei.,...&Wang, Jianqiang.(2025).Achieving dislocation-precipitation strengthening synergy in additively manufactured medium-entropy alloy via cyclic deep cryogenic strategy.SCRIPTA MATERIALIA,256,7.
MLA	Liu, Bo,et al."Achieving dislocation-precipitation strengthening synergy in additively manufactured medium-entropy alloy via cyclic deep cryogenic strategy".SCRIPTA MATERIALIA 256(2025):7.