 The study found that the thermomechanical behavior and microstructure of Marbian steel was affected by strain rate and temperature. At high strain rates of 5 x 10-3 s-1, the Holloman and Ludwig Sun equations were able to accurately predict tensile plastic properties. In contrast, under low strain rates of 5 x 10-5 s-1, the Voce and Ludwig Sun equations appeared to be more accurate at predicting the flow relationship at room temperature for 130 degrees Celsius and 630 degrees Celsius. However, the deformation microstructures had similar evolution behaviors under strain rates and temperatures. Dislocations appeared along the grain boundaries and increased the dislocation density, resulting in the formation of low-angle grain boundaries, and a decrease in the number of twins. Strengthening sources included grain boundaries strengthening, dislocation interactions, and multiplication. The fitted are two values of these models, JC, KHL, PBEVA, ZA, to plastic flow stress at 5 x 10-5 s-1 were greater than 5 x 10-3 s-1 for Marbian steel. This article was authored by Yunqing Jiang, Tong Feizhou, Meng Lu, and others. We are article.tv. Links in the description below.