In vitro corrosion fatigue behavior of low nickel high nitrogen austenitic stainless steel

Corrosion fatigue behavior of a new austenitic stainless steel, with relatively low nickel, high nitrogen and manganese (216L), and the usual 316L steel was studied in SBF, both in stress and strain control mode. Corrosion fatigue life of 216L in stress control mode was found to be longer to that of the 316L at ±450 MPa and there was opposite trend at high stress amplitudes. In strain control fatigue life of 216L was found longer than that of 316L both in air and in SBF over the strain amplitudes studied. The higher fatigue resistance of the 216L is attributed to high nitrogen content and higher stability of the austenite.