Enhanced pitting resistance for high-entropy alloys by precipitating nano-size d L12-strengthene d phase

doi:10.1016/j.jmst.2024.04.051

IMR OpenIR

	Enhanced pitting resistance for high-entropy alloys by precipitating nano-size d L12-strengthene d phase
	Li, Tianrun 1,2; Wang, Debin 1,2; Cui, Jingping 1; Wang, Qi 1; Zhang, Suode 1; Wang, Jianqiang 1
通讯作者	Zhang, Suode(sdzhang@imr.ac.cn) ; Wang, Jianqiang(jqwang@imr.ac.cn)
	2025-02-10
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	208 页码:53-66
摘要	Precipitation-strengthened HEAs exhibit outstanding integration of strength and toughness at ambient temperature. Nevertheless, precipitates generally reduce the localized corrosion resistance in aggressive solution environments. To solve this problem, a strategy of introducing nano-sized L12 precipitates in CoCrFeNiAlTi HEAs has been proposed in this work. Results demonstrate the pitting corrosion potential can be elevated from 258 mVSCE to 603 mVSCE by increasing the precipitate content to 38 wt.%. Such an improvement in localized corrosion resistance can be attributed to two aspects. Firstly, L12 precipitates tend to be dissolved during the corrosion process, which promotes the heterogeneous nucleation of protective Cr2 O3 due to the rapid deposition of oxides/hydroxides of Al/Ti, and improves the passive film stability due to the Cr-rich FCC matrix. Secondly, the dissolution kinetic inside the pits can be suppressed on account of the enrichment of Cr element in the FCC matrix, thus inhibiting the pitting growth. In summary, the current work not only reveals the mechanisms of the nano-sized L12 precipitates upon the corrosion behavior, but also provides a strategy for designing corrosion-resistant HEA. (c) 2024 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	High entropy alloys Precipitation Passive films Pitting corrosion
资助者	National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Applied Basic Research Program of Liaoning Province ; Central Guidance for Local Science and Technology Development Funds of Liaoning Province
DOI	10.1016/j.jmst.2024.04.051
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[U1908219] ; National Natural Science Foundation of China[52171163] ; Key Research Program of the Chinese Academy of Sciences[ZDRW-CN-2021-2- 2] ; Applied Basic Research Program of Liaoning Province[2022JH2/10130 0 0 05] ; Central Guidance for Local Science and Technology Development Funds of Liaoning Province[2023JH6/100100016]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001247644300001
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：6[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/321006/187055
专题	中国科学院金属研究所
通讯作者	Zhang, Suode; Wang, Jianqiang
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Li, Tianrun,Wang, Debin,Cui, Jingping,et al. Enhanced pitting resistance for high-entropy alloys by precipitating nano-size d L12-strengthene d phase[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2025,208:53-66.
APA	Li, Tianrun,Wang, Debin,Cui, Jingping,Wang, Qi,Zhang, Suode,&Wang, Jianqiang.(2025).Enhanced pitting resistance for high-entropy alloys by precipitating nano-size d L12-strengthene d phase.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,208,53-66.
MLA	Li, Tianrun,et al."Enhanced pitting resistance for high-entropy alloys by precipitating nano-size d L12-strengthene d phase".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 208(2025):53-66.