Effect of nitrogen on the critical strain for dynamic strain aging in high-manganese twinning-induced plasticity steel

The effect of nitrogen on the dynamic strain again behavior of a Fe–18% Mn–0.6% C twinning-induced plasticity steel was investigated by means of in situ infrared thermography during tensile testing. The addition of nitrogen affected the initiation of the Portevin–Le Châtelier bands and the characteristic shape of the serrations on the stress–strain curve. Also, nitrogen additions resulted in an increase in the critical strain for dynamic strain aging.