Multi-Phase-Field Analysis of Stress–Strain Curve and Ferrite Grain Formation during Dynamic Strain-Induced Ferrite Transformation
Multi-Phase-Field Analysis of Stress–Strain Curve and Ferrite Grain Formation during Dynamic Strain-Induced Ferrite Transformation
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DOI：
10.4028/www.scientific.net/kem.626.81
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发表时间：
2014-08
期刊：
影响因子：
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通讯作者：
A. Yamanaka;T. Takaki
中科院分区：
文献类型：
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作者：
A. Yamanaka;T. Takaki
通过将多相场模型与 Kocks-Mecking 模型相结合，开发了动态应变诱导铁素体相变 (DSFT) 的数值模型。使用开发的模型，对 Fe-C 合金中的 DSFT 进行了三维模拟，以研究 DSFT 过程中流变应力变化与微观结构演变之间的相关性。模拟结果表明，所开发的模型成功模拟了特征 DSFT 行为，即具有单峰的应力-应变曲线和超细晶粒铁素体微观结构的形成。 DSFT 期间流变应力的变化由铁素体相的体积分数来表征。
A numerical model of dynamic strain-induced ferrite transformation (DSFT) was developed by combining the multi-phase field model with the Kocks–Mecking model. Using the developed model, a three-dimensional simulation of the DSFT in a Fe-C alloy was performed to study the correlation between the variation in flow stress and the microstructure evolution during the DSFT. The simulation results indicated that the developed model successfully simulated the characteristic DSFT behavior, i.e., both the stress–strain curve with a single peak and the formation of an ultrafine-grained ferrite microstructure. The variation in the flow stress during the DSFT was characterized by the volume fraction of the ferrite phase.