Microstructural Evolution in Dual‐Phase Steels at High Strain Rates

Dynamic response to high velocity impact of a dual‐phase and a martensitic steel that are obtained from heat treatment of a 15V24 steel were evaluated. For the range of applied impact momentum, deformation in the martensitic steel samples was relatively homogeneous while strain localisation along shear bands was observed in the samples with dual‐phase structure. The shear bands formed in the dual‐phase steel contain finer grains and higher martensite content than the bulk material.