High-content ductile coherent nanoprecipitates achieve ultrastrong high-entropy alloys
Abstract
Precipitation-hardening high-entropy alloys (PH-HEAs) with good strength-ductility balances are a promising candidate for advanced structural applications. However, current HEAs emphasize near-equiatomic initial compositions, which limit the increase of intermetallic precipitates that are closely related to the alloy strength. Here we present a strategy to design ultrastrong HEAs with high-content nanoprecipitates by phase separation, which can generate a near-equiatomic matrix in situ while forming strengthening phases, producing a PH-HEA regardless of the initial atomic ratio. Accordingly, we develop a non-equiatomic alloy that utilizes spinodal decomposition to create a low-misfit coherent nanostructure combining a near-equiatomic disordered face-centered-cubic (FCC) matrix with high-content ductile Ni3Al-type ordered nanoprecipitates. As a result, we find that this spinodal order-disorder nanostructure contributes to a strength increase of similar to 1.5 GPa (>560%) relative to the HEA without precipitation, achieving one of the highest tensile strength (1.9 GPa) among all bulk HEAs reported previously while retaining good ductility (>9%).
- Authors:
-
- Beijing Institute of Technology, Beijing (China)
- Chinese Academy of Sciences (CAS), Beijing (China)
- Nanjing Univ. of Science and Technology, Nanjing (China)
- Univ. of Science and Technology Beijing, Beijing (China)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Tsinghua Univ., Beijing (China)
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- National Natural Science Foundation of China (NSFC); China Postdoctoral Science Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1504263
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Liang, Yao -Jian, Wang, Linjing, Wen, Yuren, Cheng, Baoyuan, Wu, Qinli, Cao, Tangqing, Xiao, Qian, Xue, Yunfei, Sha, Gang, Wang, Yandong, Ren, Yang, Li, Xiaoyan, Wang, Lu, Wang, Fuchi, and Cai, Hongnian. High-content ductile coherent nanoprecipitates achieve ultrastrong high-entropy alloys. United States: N. p., 2018.
Web. doi:10.1038/s41467-018-06600-8.
Liang, Yao -Jian, Wang, Linjing, Wen, Yuren, Cheng, Baoyuan, Wu, Qinli, Cao, Tangqing, Xiao, Qian, Xue, Yunfei, Sha, Gang, Wang, Yandong, Ren, Yang, Li, Xiaoyan, Wang, Lu, Wang, Fuchi, & Cai, Hongnian. High-content ductile coherent nanoprecipitates achieve ultrastrong high-entropy alloys. United States. https://doi.org/10.1038/s41467-018-06600-8
Liang, Yao -Jian, Wang, Linjing, Wen, Yuren, Cheng, Baoyuan, Wu, Qinli, Cao, Tangqing, Xiao, Qian, Xue, Yunfei, Sha, Gang, Wang, Yandong, Ren, Yang, Li, Xiaoyan, Wang, Lu, Wang, Fuchi, and Cai, Hongnian. Wed .
"High-content ductile coherent nanoprecipitates achieve ultrastrong high-entropy alloys". United States. https://doi.org/10.1038/s41467-018-06600-8. https://www.osti.gov/servlets/purl/1504263.
@article{osti_1504263,
title = {High-content ductile coherent nanoprecipitates achieve ultrastrong high-entropy alloys},
author = {Liang, Yao -Jian and Wang, Linjing and Wen, Yuren and Cheng, Baoyuan and Wu, Qinli and Cao, Tangqing and Xiao, Qian and Xue, Yunfei and Sha, Gang and Wang, Yandong and Ren, Yang and Li, Xiaoyan and Wang, Lu and Wang, Fuchi and Cai, Hongnian},
abstractNote = {Precipitation-hardening high-entropy alloys (PH-HEAs) with good strength-ductility balances are a promising candidate for advanced structural applications. However, current HEAs emphasize near-equiatomic initial compositions, which limit the increase of intermetallic precipitates that are closely related to the alloy strength. Here we present a strategy to design ultrastrong HEAs with high-content nanoprecipitates by phase separation, which can generate a near-equiatomic matrix in situ while forming strengthening phases, producing a PH-HEA regardless of the initial atomic ratio. Accordingly, we develop a non-equiatomic alloy that utilizes spinodal decomposition to create a low-misfit coherent nanostructure combining a near-equiatomic disordered face-centered-cubic (FCC) matrix with high-content ductile Ni3Al-type ordered nanoprecipitates. As a result, we find that this spinodal order-disorder nanostructure contributes to a strength increase of similar to 1.5 GPa (>560%) relative to the HEA without precipitation, achieving one of the highest tensile strength (1.9 GPa) among all bulk HEAs reported previously while retaining good ductility (>9%).},
doi = {10.1038/s41467-018-06600-8},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {Wed Oct 03 00:00:00 EDT 2018},
month = {Wed Oct 03 00:00:00 EDT 2018}
}
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