Influences of carbon concentration on microstructure and tensile properties of Fe–18Mn–9Cr–2Al–xC steels

As an effort to develop corrosion resistant and highly formable austenitic steels, Fe–18Mn–9Cr–2Al–(0–0.5)C steels in wt. % were designed and their microstructures and tensile properties were investigated with particular attention being paid to the effects of carbon concentration. The carbon-free steel consisted of the austenite, δ-ferrite and ε-martensite phases in as heat-treated condition while those of carbon-added steels had an austenite...