A novel high-entropy alloy with multi-strengthening mechanisms: Activation of TRIP effect in C-doped high-entropy alloy
- Authors
- Do, Hyeon-Seok; Jang, Tae Jin; Kim, Ki Jeong; Sohn, Seok Su; Lee, Byeong-Joo
- Issue Date
- 24-11월-2022
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- High-entropy alloys; Multi-strengthening mechanisms; Computational design; CALPHAD
- Citation
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.859
- Indexed
- SCIE
SCOPUS
- Journal Title
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
- Volume
- 859
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/146493
- DOI
- 10.1016/j.msea.2022.144220
- ISSN
- 0921-5093
- Abstract
- Efforts have been made to intentionally activate multiple strengthening mechanisms in a single alloy because individual strengthening effects have not been sufficiently exhibited in previous alloys with multi-strengthening mechanisms. Here, we design a novel high-entropy alloy with multi-strengthening mechanisms through a stepwise design approach utilizing CALPHAD type thermodynamic calculation. The target strengthening mechanisms are introduced step by step, from solid solution strengthening, the addition of precipitation hard-ening and transformation-induced plasticity, based on the calculation. The finally designed Co21Cr11Fe49Mn4-Ni4V2C1Mo3Si5 alloy simultaneously benefits from solid solution strengthening due to Mo and V addition, precipitation hardening from nanoscale precipitates, grain boundary strengthening by grain refinement, and transformation-induced plasticity by BCC deformation-induced martensite transformation. Individual strength-ening effects is sufficiently exhibited in the designed alloy, which leads to an excellent combination of yield strength (732 MPa), ultimate tensile strength (1100 MPa), and ductility (47.5%).
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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