A modified single-arm source model for the size-dependent strain-hardening behavior of metallic micropillars

This article aims to construct a size-dependent strain-hardening model for predicting metallic micropillars plastic deformation. Its validity is examined experimentally. The innovations of the modified model are the further considerations of stochastic characteristic plastic flow, anisotropic dislocation interaction and dislocation density evolution in classical single-arm source model. The proposed model is able to provide a comprehensive understanding of the absence and presence of the strain hardening phenomenon in micropillar plasticity. 106