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arXiv · 2009.11695

Correlation of microdistortions with misfit volumes in High Entropy Alloys

Wolfram Georg Nöhring·W. A. Curtin
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Abstract

The yield strengths of High Entropy Alloys have recently been correlated with measured picometer-scale atomic distortions. Here, the root mean square microdistortion in a multicomponent alloy is shown to be nearly proportional to the misfit-volume parameter that enters into a predictive model of solute strengthening. Analysis of two model ternary alloy families, face-centered cubic Cr-Fe-Ni and body-centered cubic Nb-Mo-V, demonstrates the correlation over a wide composition space. The reported correlation of yield strength with microdistortion is thus a consequence of the correlation between microdistortion and misfit parameter and the derived dependence of yield strength on the misfit parameter.

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Wolfram Georg Nöhring, W. A. Curtin. 2020-09-24. Correlation of microdistortions with misfit volumes in High Entropy Alloys. https://doi.org/10.1016/j.scriptamat.2019.04.012

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