Effects of Deformation Induced Phase Transformation and Twinning on the Mechanical Properties of Austenitic Fe–Mn–Al Alloys

摘要: Structure and mechanical properties of austenitic Fe–(20 30)Mn–(0 to 7) Al alloys in the temperature range between 77 295 K have been investigated relation occurrences phase transformation deformation twinning. Additions aluminum 20 wt% Mn significantly decreased γ→e temperature. The yield stress these increased with increasing content, whereas strain hardening them decreased. This tendency is prominent at low temperatures. In 30 were almost identical regardless contents. strongly suppress give birth occurrence Calculated stacking fault energy based on a regular solution approach shows that Fe–Mn–Al which approximately larger than erg/cm2 favor twinning leading increase ductility.