Effect of heat treatment on the structure of the Fe-28Mn-12Al-0.9Si-1.35C alloy, additionally doped by Ni 3.3, Cr 1, V 0.15 (wt. %)

Microstructure of the novel high-strength steel Fe-28Mn-12Al-0.9Si-1.35C after additional alloying and thermal treatment was investigated. Nickel and chrome in quantity of 3,3 and 1 wt. % respectively were added to the basic alloy to obtain less primary ferrite and to ensure austenite alloying rate. Vanadium was added to refine structure and to elevate mechanical properties. All three alloys were investigated in four states: as-cast, annealed, quenched and aged after quenching.