Journal
SCRIPTA MATERIALIA
Volume 139, Issue -, Pages 83-86Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2017.06.014
Keywords
Generalized stacking fault energy; Ductility; Twinnability; High entropy alloys
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Funding
- University of Missouri Research Board
- Extreme Science and Engineering Discovery Environment (XSEDE) [TG-DMR140008]
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Effects of Cu, Mn, Al, Ti, Mo on generalized stacking fault energies, Rice-criterion ductilities, and twinabilities of CoCrFeNi-based face-centered cubic high entropy alloys were investigated using density functional theory calculations. The calculated barrier energies and twinnabilities revealed that the addition of Ti or Mo increased the tendency of dislocation glide and deformation twinning, while addition of Mn, Cu and relatively high amount of Al facilitated dislocation gliding and martensitic transformation. Low amount of Al resulted in only dislocation gliding. Furthermore, the addition of Mn and Cu increased the calculated Rice-criterion ductility while other elements decreased it (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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