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

文献类型：期刊论文

作者Pang, Jingyu2; Zhang, Hongwei2; Ji, Yu2; Zhu, Zhengwang1; Zhang, Long2; Li, Hong1; Wang, Aimin2; Zhang, Haifeng1
刊名MATERIALS CHARACTERIZATION
出版日期2023-11-01
卷号205页码:9
关键词Refractory high-entropy alloy High-temperature aging Structural stability GB precipitate Microhardness
ISSN号1044-5803
DOI10.1016/j.matchar.2023.113321
通讯作者Pang, Jingyu(jypang17s@imr.ac.cn) ; Zhang, Hongwei(hongweizhang@imr.ac.cn)
英文摘要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.
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
语种英语
WOS记录号WOS:001089100400001
出版者ELSEVIER SCIENCE INC
资助机构Liaoning Key Research and Development Program ; Chinese Academy of Sciences ; Natural Science Foundation of Liaoning Province ; Youth Innovation Promotion Association CAS ; IMR Innovation Fund
源URL[http://ir.imr.ac.cn/handle/321006/177946]  
专题金属研究所_中国科学院金属研究所
通讯作者Pang, Jingyu; Zhang, Hongwei
作者单位1.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China
2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, 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.

入库方式： OAI收割

来源：金属研究所

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