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      High-entropy alloy strengthened by in situ formation of entropy-stabilized nano-dispersoids

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          Abstract

          A significant increase in compressive yield strength of the Al 0.3CoCrFeMnNi high-entropy alloy (HEA) from 979 MPa to 1759 MPa was observed upon the introduction of 3 vol.% Y 2O 3. The HEAs were processed using spark plasma sintering of mechanically alloyed powders. Transmission electron microscopy and atom probe tomography confirmed the presence of compositionally complex nano-dispersoids in the Y 2O 3-added HEA. The significant increase in strength can be attributed to the nano-dispersoid strengthening coupled with grain refinement. Therefore, the in-situ formation of the compositionally complex nanoscale dispersoids during the alloy processing could be a novel approach to create entropy-stabilized oxide particles in strengthening of HEAs.

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          A critical review of high entropy alloys and related concepts

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            The influences of temperature and microstructure on the tensile properties of a CoCrFeMnNi high-entropy alloy

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              High-entropy alloy: challenges and prospects

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                Author and article information

                Contributors
                hojinryu@kaist.ac.kr
                shhong@kaist.ac.kr
                Journal
                Sci Rep
                Sci Rep
                Scientific Reports
                Nature Publishing Group UK (London )
                2045-2322
                20 September 2018
                20 September 2018
                2018
                : 8
                : 14085
                Affiliations
                [1 ]ISNI 0000 0001 1008 957X, GRID grid.266869.5, Department of Materials Science and Engineering, , University of North Texas, ; 1155 Union Circle, Denton, TX 76203 USA
                [2 ]ISNI 0000 0001 2292 0500, GRID grid.37172.30, Department of Materials Science and Engineering, , Korea Advanced Institute of Science and Technology, ; 291 Daehak-ro, Yuseong-gu, Daejeon, 34141 Republic of Korea
                [3 ]Korea Institute of Rare Metals, Gaetbeol-ro 12, Incheon, Republic of Korea
                [4 ]ISNI 0000 0001 2292 0500, GRID grid.37172.30, Department of Nuclear and Quantum Engineering, , Korea Advanced Institute of Science and Technology, ; 291 Daehak-ro, Yuseong-gu, Daejeon, 34141 Republic of Korea
                Author information
                http://orcid.org/0000-0002-3387-7381
                Article
                32552
                10.1038/s41598-018-32552-6
                6148222
                30237517
                3e739ba3-bee7-4069-b05d-3be44653feaf
                © The Author(s) 2018

                Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

                History
                : 1 May 2018
                : 11 September 2018
                Funding
                Funded by: FundRef https://doi.org/10.13039/501100003725, National Research Foundation of Korea (NRF);
                Award ID: NRF-2015R1A2A2A01002436
                Award ID: NRF-2016R1E1A1A01943278
                Award Recipient :
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