High-strength precipitation-hardening austenitic Fe–Mn–V–Mo–C steels with shape memory effect

Austenitic Fe–20% Mn alloys with the shape memory effect (SME) were studied. The alloys contained different carbon concentrations and were doped with V and Mo so as to achieve the maximum strengthening. It was shown that the contribution of the precipitation hardening depended strongly on the carbon concentration, the number of carbide-forming elements, and the temperature-and-time parameters of aging. The SME was controlled by stabilization and destabilization of the austenite with respect to the formation of the ɛ-martensite. For this purpose, conditions of formation of V(Mo)C carbides were adjusted.