**Abstract Scope** |
A theory to describe the temperature and strain-rate-dependance of the yield strength of solid solution FCC alloys has been recently extended to deal with arbitrary alloy composition and number of components [1].
Here, we address the validity of a simplified elasticity-based version of this model for High Entropy Alloys (HEAs). We first consider large-scale, finite-temperature MD simulations on a model 4-component alloy. The theory predicts the characteristic lengths of the low-energy dislocation structure and the flow stress versus temperature in good agreement with simulations. We then successfully apply the model to predict the strength of already-characterized HEAs in the Ni-Co-Fe-Cr-Mn and Noble metals classes, and the strengthening provided by dilute additions to HEAs [1,3]. With this simple version validated, we make predictions for new materials and discuss HEA design.
[1] C.Varvenne, A.Luque, W.A.Curtin, Acta Mater. (2016).
[2] C.Varvenne, S.I.Rao, W.G.Nöhring, W.A.Curtin, in prep.
[3] C.Varvenne, W.A.Curtin, Scripta Mater. (2017); |