Revealing extra strengthening and strain hardening in heterogeneous two-phase nanostructures

Heterogeneous metals and alloys are a new class of materials that emerged recently with outstanding mechanical performances such as excellent strength-ductility synergy, significant friction and wear reduction and high fatigue limits. Experiments demonstrated that back stress plays an important role in enhancing the strength-ductility balance. However, how does the back stress play the role remains fully unsolved. Here for a two-phase...