High-temperature structural and mechanical stability of refractory high-entropy alloy Nb40Ti25Al15V10Ta5Hf3W2

doi:10.1016/j.matchar.2023.113321

IMR OpenIR

	High-temperature structural and mechanical stability of refractory high-entropy alloy Nb40Ti25Al15V10Ta5Hf3W2
	Pang, Jingyu 1; Zhang, Hongwei 1; Ji, Yu 1; Zhu, Zhengwang 2; Zhang, Long 1; Li, Hong 2; Wang, Aimin 1; Zhang, Haifeng 2
通讯作者	Pang, Jingyu(jypang17s@imr.ac.cn) ; Zhang, Hongwei(hongweizhang@imr.ac.cn)
	2023-11-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	205 页码:9
摘要	Refractory high-entropy alloys (RHEAs) with superior mechanical properties have been considered as a potential next-generation candidate for high-temperature structural materials. However, the structural stability of RHEAs at high temperatures is still noncommittal so far. Especially, the Al containing RHEAs with coherent BCC/B2 microstructure usually form intermetallic phases following short/long term aging at elevated temperatures, which deteriorate the mechanical performance. In this work, we systematically determine the microstructural evolution, including intergranular precipitates, BCC/B2 morphology, and corresponding mechanical properties changes of the Nb40Ti25Al15V10Ta5Hf3W2 RHEA from 923 K to 1123 K. The density of antiphase domain boundaries (APBs) in the RHEA after aging at 923 K is significantly higher than at 1023 K and 1123 K. Only a low volume fraction of tetragonal (Nb, Hf)2Al phase precipitates along grain boundaries after aging at 1123 K. However, the microhardness and yield strengths of the RHEA after aging at 923 K -1123 K are close to those of the as-cast RHEA, which proves that the APBs and low-density (Nb, Hf)2Al precipitates have a negligible effect on the mechanical performance of the RHEA. Therefore, the Nb40Ti25Al15V10Ta5Hf3W2 RHEA exhibits superior structural stability from 923 K to 1123 K, which also imparts the mechanical stability. This work guides towards tailoring the composition and microstructure of RHEAs for even better high-temperature mechanical performance.
关键词	Refractory high-entropy alloy High-temperature aging Structural stability GB precipitate Microhardness
资助者	Liaoning Key Research and Development Program ; Chinese Academy of Sciences ; Natural Science Foundation of Liaoning Province ; Youth Innovation Promotion Association CAS ; IMR Innovation Fund
DOI	10.1016/j.matchar.2023.113321
收录类别	SCI
语种	英语
资助项目	Liaoning Key Research and Development Program[2022JH2/101300080] ; Chinese Academy of Sciences[ZDBS-LY-JSC023] ; Natural Science Foundation of Liaoning Province[2023-BS-012] ; Youth Innovation Promotion Association CAS[2021188] ; IMR Innovation Fund[2023-PY16]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS记录号	WOS:001089100400001
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：12[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/321006/177947
专题	中国科学院金属研究所
通讯作者	Pang, Jingyu; Zhang, Hongwei
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China
推荐引用方式 GB/T 7714	Pang, Jingyu,Zhang, Hongwei,Ji, Yu,et al. High-temperature structural and mechanical stability of refractory high-entropy alloy Nb40Ti25Al15V10Ta5Hf3W2[J]. MATERIALS CHARACTERIZATION,2023,205:9.
APA	Pang, Jingyu.,Zhang, Hongwei.,Ji, Yu.,Zhu, Zhengwang.,Zhang, Long.,...&Zhang, Haifeng.(2023).High-temperature structural and mechanical stability of refractory high-entropy alloy Nb40Ti25Al15V10Ta5Hf3W2.MATERIALS CHARACTERIZATION,205,9.
MLA	Pang, Jingyu,et al."High-temperature structural and mechanical stability of refractory high-entropy alloy Nb40Ti25Al15V10Ta5Hf3W2".MATERIALS CHARACTERIZATION 205(2023):9.