A new strategy for designing immiscible medium-entropy alloys with excellent tensile properties
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SCOPUS
- Title
- A new strategy for designing immiscible medium-entropy alloys with excellent tensile properties
- Authors
- Moon, Jongun; Park, Jeong Min; Wung, Jae; Do, Hyeon-Seok; Lee, Byeong-Joo; Kim, Hyoung Seop
- Date Issued
- 2020-07
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Abstract
- Here, a new strategy for designing heterogeneous medium-entropy alloys with light-weight and excellent mechanical properties is proposed. Al-x(CuFeMn)(100-x) (x = 0, 7.5, and 15 at%) alloys were developed by utilizing the immiscible nature of Cu-Fe alloys. The microstructures of the alloys show phase separation into Cu-rich and Fe-rich regions, and the addition of Al transforms the crystal structure from dual face-centered cubic to face-centered cubic and body-centered cubic. Phase separation of the microstructure into two domains enables further dissolution of Al into the matrix. The alloys exhibit high strength because of solid solution strengthening and hetero-deformation induced strengthening caused by heterogeneous microstructures. The presence of nano-scale twins and essential partially recrystallized microstructures also enhances the strength of the alloys. This new type of medium-entropy alloys is expected to expand the design window in physical metallurgy. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/107872
- DOI
- 10.1016/j.actamat.2020.03.050
- ISSN
- 1359-6454
- Article Type
- Article
- Citation
- ACTA MATERIALIA, vol. 193, page. 71 - 82, 2020-07
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