Abstract The need to improve formability and weight reduction in the automotive industry has greatly contributed to the development of transformation-induced plasticity (TRIP) steel. The stress–strain curves of TRIP steels can be generally controlled by adjusting composition, temperature and volume fractions. Based on Hollomon equation and mixture law, microstructure-based constitutive model of Si-Mn TRIP (transformation induced plasticity) steels in a static state was gained with experimental results through deriving steps “from ferrite and martensite to ferrite, martensite, and bainite, and finally to ferrite, martensite, bainite and austenite.” The simulation results were in good agreement with the experimental results. The true stress–strain curves of Si-Mn TRIP steels can be accurately predicted by computational method, which can be extended to more complex multicomponent alloy system. It can also be found that in TRIP steel, the strength of bainite and retained austenite are close.

中文翻译：

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基于显微组织的硅锰 TRIP 钢静态力学行为本构模型

摘要 汽车工业对提高成形性和减轻重量的需求极大地促进了相变诱导塑性（TRIP）钢的发展。TRIP 钢的应力-应变曲线通常可以通过调整成分、温度和体积分数来控制。基于霍洛蒙方程和混合定律，通过“从铁素体和马氏体到铁素体、马氏体和贝氏体，和最后变成铁素体、马氏体、贝氏体和奥氏体。” 模拟结果与实验结果吻合良好。Si-Mn TRIP钢的真实应力-应变曲线可以通过计算方法准确预测，可以扩展到更复杂的多组分合金系统。还可以发现，在TRIP钢中，贝氏体和残余奥氏体的强度接近。