Hot deformation behavior of a novel hot‐rolled transformation‐induced plasticity (TRIP) alloy is studied by compression test in the temperature range of 1123–1323 K and strain rate range of 0.1–10 s⁻¹, and the relation between flow stress and Zener–Hollomon parameter is systematically analyzed. The study indicates that the flow stress of experimental alloy increases with the decrease in deformation temperature and increase in strain rate. The value of stress exponent (n) and activation energy (Q) is 7.4 and 323.5 kJ mol⁻¹. Processing maps developed using the dynamic material model at strains of 0.25, 0.40, and 0.55 predict optimum hot deformation temperature of 1273 K and strain rate of 0.8 s⁻¹. The study of dynamic recrystallization (DRX) behavior under different deformation conditions by transmission electron microscope (TEM) suggests that two DRX mechanisms are operative—continuous dynamic recrystallization (CDRX) mechanism, which depends on high density of dislocations at the grain boundaries, and the second mechanism involves strain‐induced boundary migration (SIBM), governed by grain boundary bulging.

中文翻译：

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新型热轧相变诱发塑性合金的高温变形行为：实验，本构模型和加工图

通过在1123–1323 K的温度范围和0.1–10 s ^-1的应变率范围内的压缩试验研究了新型热轧相变诱发塑性（TRIP）合金的热变形行为，以及流动应力与应力的关系。系统分析了Zener-Hollomon参数。研究表明，实验合金的流动应力随着变形温度的降低和应变速率的增加而增加。应力指数（n）和活化能（Q）分别为7.4和323.5 kJ mol ^-1。使用动态材料模型在0.25、0.40和0.55应变下开发的加工图预测的最佳热变形温度为1273 K，应变速率为0.8 s ^-1。通过透射电子显微镜（TEM）对不同变形条件下的动态重结晶（DRX）行为的研究表明，两种DRX机制是有效的-连续动态重结晶（CDRX）机制，其取决于晶界处的高位错密度，并且第二种机制涉及应变诱发的边界迁移（SIBM），其受​​晶界凸起的影响。