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首页> 外文期刊>Journal of engineering materials and technology >Modeling of Reversed Austenite Formation and Its Effect on Performance of Stainless Steel Components
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Modeling of Reversed Austenite Formation and Its Effect on Performance of Stainless Steel Components

机译：逆转奥氏体形成的建模及其对不锈钢组分性能的影响

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The kinetics of reversed austenite formation in 301 stainless steel and its effect on the deformation of an automobile front bumper beam are studied by using modeling approaches at different length scales. The diffusion-controlled reversed austenite formation is studied by using the Johnson-Mehl-Avrami-Kolmogorov (JMAK) model, based on the experimental data. The model can be used to predict the volume fraction of reversed austenite in a temperature range of 650-750 °C. A three-dimensional elastoplastic phase-field model is used to study the diffusionless shear-type reversed austenite formation in 301 steel at 760 °C. The phase-field simulations show that reversion initiates at martensite lath boundaries and proceeds inwards of laths due to the high driving force at such high temperature. The effect of reversed austenite (RA) and martensite on the deformation of a bumper beam subjected to front and side impacts is studied by using finite element (FE) analysis. The FE simulations show that the presence of reversed austenite and martensite increased the critical speed at which the beam yielded and failed. RA fraction also affects the performance of the bumper beam.
机译：通过在不同长度尺度的建模方法研究了301个不锈钢中逆转奥氏体形成的动力学及其对汽车前保险杠梁变形的影响。通过使用Johnson-Mehl-Avrami-Kolmogorov（JMAK）模型，基于实验数据，研究了扩散控制的逆转奥氏体形成。该模型可用于预测650-750℃的温度范围内逆转奥氏体的体积分数。三维弹塑性相场模型用于在760℃下在301钢中研究扩散剪切型反向奥氏体形成。相场模拟表明，由于在这种高温下的高驱动力，逆转在马氏体Lath边界处发起并在车道向内进行。通过使用有限元（Fe）分析，研究了逆转奥氏体（Ra）和马氏体对经过前侧冲击的保险杠梁的变形的影响。 FE模拟表明，逆转奥氏体和马氏体的存在增加了梁产生和失败的临界速度。 RA分数也影响保险杠光束的性能。

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