Strengthening of high entropy alloys by dilute solute additions: CoCrFeNiAlx and CoCrFeNiMnAlx alloys

A theory to predict the initial flow stress of an arbitrary N-component fcc random alloy is extended to predict the additional strengthening when a dilute concentration of a substitutional element is introduced. Assuming properties for the N-component alloy to be established, the theory requires only information on the elastic and lattice constants of the new N + 1-alloy, and makes a parameter-free prediction for the strength increment due to the added N + 1st element. The theory is applied to the CoCrFeNiAlx and CoCrFeNiMnAlx systems, achieving good agreement with experiments. The theory thus serves as a valuable tool for guiding design of new fcc random alloys. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.


Published in:
Scripta Materialia, 138, 92-95
Year:
2017
Publisher:
Oxford, Pergamon-Elsevier Science Ltd
ISSN:
1359-6462
Keywords:
Laboratories:




 Record created 2017-09-05, last modified 2018-09-13


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