Dynamic impact behavior and ferrite variation of special stainless steels

The duplex stainless steel and super-austenitic stainless steel were impacted at two strain rates of 8.5 × 102 s−1 and 5 × 103 s−1. Two duplex stainless steels show strain softening and shear band was revealed at the surface. Austenitic stainless steel 254 SMO exhibits strain hardening completely and the diffuse Luders bands appear at the surface.