Re-examining the relation between fracture strain and yield stress in Al-Mg-Si alloys

摘要

A linear relationship between fracture strain, e_t, and yield strength first observed by Lloyd (2003) in aluminum alloys is re-examined for age-hardenable AA6063. A breakdown in the relationship is observed if AA6063 is pre-strained prior to ageing. A linear relationship is recovered for e_f versus dislocation initial inter-obstacle spacing,