A Perspective on Strain Hardening Behavior of Materials Considering Mobile Dislocation Density and Activation Volume (original) (raw)

This study derives a criterion based on the interplay between mobile dislocation density and activation volume to understand the macroscopic strain hardening behavior of materials. The findings indicate that low activation volume leads to a pronounced drop in strain hardening rates due to enhanced softening effects from mobile dislocation density. This research utilizes two age-hardenable Al alloys, AA 2195 and AA 6061, to illustrate these behaviors, ultimately contributing to a deeper understanding of how microstructural factors influence strain hardening.