Incorporation of physics-based strengthening coefficients into phenomenological crystal plasticity models

TL;DR

This paper demonstrates that incorporating physics-based strengthening coefficients from discrete dislocation dynamics into phenomenological crystal plasticity models enhances their predictive accuracy without additional experimental costs.

Contribution

It introduces a method to embed physically meaningful strengthening coefficients into phenomenological models, improving their reliability and applicability in materials science.

Findings

Strengthening coefficients from dislocation simulations improve model predictions

Physically-informed parameters enhance phenomenological model accuracy

Method applicable to most technologically relevant materials

Abstract

The efforts associated with parametrization of continuum-based models for crystal plasticity are a significant obstacle for the routine use of these models in materials science and engineering. While phenomenological constitutive descriptions are attractive due to their small number of adjustable parameters, the lack of physical meaning of their parameters counteracts this advantage to some extent. This study shows that interaction/strengthening coefficients determined with the help of discrete dislocation dynamics simulations for use in physics-based formulations can also be used to improve the predictive quality of phenomenological models. Since the values of these parameters have been determined for most technologically relevant materials, the findings enable to improve the parametrization of phenomenological crystal plasticity models at no costs.