High Strain Rate and Stress-State-Dependent Martensite Transformation in AISI 304 at Low Temperatures

Deformation-induced martensitic transformation as the basis of a hardening process is dependent, among others, on stress state. In applications such cryogenic cutting, where hardened subsurface can be produced in metastable austenitic steels, different states exist. Furthermore, cutting typically occurs at high strain rates greater than 103s?1. order to gain deeper insight into behavior steel (AISI 304) upon influence under loading conditions was analyzed. It observed that higher lead decrease ??-martensite content if exposed tensile loads due generated adiabatic heat. lath-like induced. Under shear stress, no suppression formation by found. A lath formed, too. specimens were subjected exclusively compressive loading, almost present. The surface experiments showed deformation lines which formed wave-like shape. As for specimens, more with increasing rate, i.e., force. Additionally, magnetic etching proved an effective method verify ferromagnetic ??-martensite.