The dynamic tensile behavior of Fe-15Mn-3Al-0.23C TRIP/TWIP steel was studied at intermediate strain rates in the range of 7–700 s⁻¹. The results showed that transformation induced plasticity (TRIP) effect, twinning induced plasticity (TWIP) effect, dislocation glide and adiabatic temperature rise effect coexisted during dynamic deformation. With the increase of strain rate from 7 to 70 s⁻¹, the number of deformation twins increased and some intersecting twins appeared. However, when the strain rate approached 700 s⁻¹, the amount of deformation twins were decreased and intersecting twins disappeared. During deformation at strain rates from 7 to 700 s⁻¹, the strain rate had no significant effect on TRIP effect, and deformation twinning was the main deformation mechanism. The ultimate tensile strength (UTS) showed a positive strain rate sensitivity with increased strain rate, and the experimental steel exhibited remarkable mechanical properties with the product of ultimate tensile strength and total elongation (PSE) of 61.5 GPa% at the strain rate of 70 s⁻¹.

研究了Fe-15Mn-3Al-0.23C TRIP / TWIP钢在7–700 s ^-1的中等应变速率下的动态拉伸行为。结果表明，在动态变形过程中，同时存在相变诱导塑性（TRIP），孪生相诱导塑性（TWIP），位错滑移和绝热温升效应。随着应变速率从7 s ^-1增加到70 s ^-1，变形孪晶的数量增加，并且出现了一些相交的孪晶。但是，当应变速率接近700 s ^-1时，变形孪晶的数量减少而相交的孪晶消失。在变形期间，应变速率为7到700 s ^-1，应变速率对TRIP效应没有显着影响，变形孪生是主要的变形机理。极限抗拉强度（UTS）随应变率的增加显示出正应变率敏感性，并且实验钢表现出显着的机械性能，在70 s应变率下极限抗拉强度与总伸长率（PSE）的乘积为61.5 GPa％^-1。