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首页> 外文期刊>ISIJ international >Simulation of Austenite-to-ferrite Transformation in Deformed Austenite by Crystal Plasticity Finite Element Method and Multiphase-field Method
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Simulation of Austenite-to-ferrite Transformation in Deformed Austenite by Crystal Plasticity Finite Element Method and Multiphase-field Method

机译：形变有限元法和多相场法模拟变形奥氏体中奥氏体向铁素体的转变

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摘要

A simulation model to describe the austenite-to-ferrite transformation in the deformed austenite phase is developed using the crystal plasticity finite element and multi-phase-field methods. Using the developed model, we simulate the plastic deformation behavior of the polycrystalline austenite phase during plane strain compression and the subsequent isothermal austenite-to-ferrite transformation. The ferrite nucle-ation behaviors on the elongated austenite grain boundary and the deformation bands formed in the austenite grain are estimated on the basis of the classical nucleation theory. In this study, the effects of plastic deformation of the austenite phase and the holding temperature on the transformation kinetics and the ferrite grain size are investigated. The simulation results show that transformation is accelerated with an increase in the strain in the austenite phase. Furthermore, it is confirmed that ferrite grain refinement occurs by the enhancement of ferrite nucleation within the deformed austenite grain interior and by the suppression of ferrite grain growth due to hard impingement.
机译：利用晶体塑性有限元和多相场方法，建立了描述奥氏体向奥氏体-铁素体相变的模拟模型。使用开发的模型，我们模拟了多晶奥氏体相在平面应变压缩和随后的等温奥氏体到铁素体相变过程中的塑性变形行为。基于经典形核理论，估计了拉长奥氏体晶界上的铁素体形核行为和在奥氏体晶粒中形成的形变带。在这项研究中，研究了奥氏体相的塑性变形和保持温度对相变动力学和铁素体晶粒尺寸的影响。模拟结果表明，随着奥氏体相中应变的增加，相变加速。此外，已经证实，通过增强变形奥氏体晶粒内部的铁素体成核作用以及抑制由于硬冲击引起的铁素体晶粒的生长，铁素体晶粒细化。

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