In the present work, the Fe-13Mn-8Al-(0.7, 1.2)C steels were subjected to different post-cold rolling annealing treatments in a temperature range of 800 to 1000 °C for 15 min to investigate the microstructural evolution and the mechanical properties. Both steels annealed at 800 °C consisted of fine austenite and ferrite grains along with intergranular κ-carbides formed by eutectoid reaction, which contributed to the high strength but deteriorated ductility. With annealing temperature increasing, the volume fraction of ferrite and intergranular κ-carbides progressively decreased. Meanwhile, the precipitation of intragranular κ′-carbides enhanced the yield strength, whereas coarse austenite was harmful to both strength and elongation. The increase in C content increased the volume fraction of intergranular κ-carbides and austenite as well as retarded the austenite recrystallization, which further increased strength and strain hardening rate but deteriorate ductility. The deformation mechanism in austenite was massive planar slip. The microbands were widely observed in both steels at an annealing temperature above 900 °C.

在目前的工作中，对Fe-13Mn-8Al-（0.7，1.2）C钢在800至1000°C的温度范围内进行了15分钟的不同冷轧后退火处理，以研究其组织演变和力学性能。属性。两种在800°C退火的钢均由细小的奥氏体和铁素体晶粒以及通过共析反应形成的晶间κ碳化物组成，这有助于提高强度但降低延展性。随着退火温度的升高，铁素体和晶间κ碳化物的体积分数逐渐降低。同时，晶内κ′碳化物的析出提高了屈服强度，而粗奥氏体对强度和伸长率均有害。C含量的增加增加了晶间κ碳化物和奥氏体的体积分数，并阻碍了奥氏体的再结晶，从而进一步提高了强度和应变硬化率，但延展了延展性。奥氏体的变形机理是大量的平面滑动。在高于900°C的退火温度下，两种钢中均广泛观察到微带。