Superplasticity in a high-manganese (nickel free) stainless steel

Abstract

Mechanical (tensile tests) and microstructural (optical and scanning electron microscopy) investigations have been performed on a heavily cold-rolled nickel-free stainless steel plate having a nominal (weight percent) composition: 14 Cr-20 Mn-balance Fe. Preliminary results, showing superplastic behaviour exhibited by this high-manganese stainless steel, when deformed in the temperature range 20 to 900°C and at a low initial strain rateisi (£ 1.5x10^-3 s^-1), are reported and discussed.