Behavior of Transformation-Induced Plasticity during Adiabatic Shear Bands Formation in High Manganese Steels



The transformation-induced plasticity (TRIP) effect is examined at high strain rate of over 104 s−1 compression during adiabatic shear band (ASB) formation to determine whether the TRIP effect proceeds smoothly and whether it can restrain ASB formation. Results show two distinct stages of TRIP during dynamic straining: the smooth occurrence of TRIP before ASB formation and its suppression during ASB formation, which is attributed to grain refinement, accumulated crystal defects, and adiabatic temperature rising. Compared with copper and martensitic armor steel, TRIP steel demonstrates a higher work hardening effect attributed to the strong interaction of austenite (γ), ϵ-martensite, and α′-martensite. Such interaction effectively postpones ASB formation.