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首页> 外文会议>International Conference on Solid - Solid Phase Transformations in Inorganic Materials 2005 vol.2; 20050529-0603; Phoenix,AZ(US) >Theory for Multicomponent Diffusional Kinetics and its Application to the Reaustenitisation of Dual Phase and TRIP Steels
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Theory for Multicomponent Diffusional Kinetics and its Application to the Reaustenitisation of Dual Phase and TRIP Steels

机译：多组分扩散动力学理论及其在双相和TRIP钢的再奥化中的应用

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摘要

A general solution for the diffusion equation applied to moving interfaces in multicomponent systems is presented. The solution is simultaneously solved with the chemical potential equations describing multicomponent thermodynamic equilibrium, ensuring local equilibrium at the interface. Phase kinetics and thermodynamics are rigorously linked irrespective of the number of solutes in the system and their difference in diffusivity. The mathematical compactness of the equations resulted in an increase of the computations speed as compared to other approaches. The model is applied to calculate the reaustenitisation kinetics for TRIP and Dual Phase steels with four and more components. The progress in ferrite, cementite and austenite compositions and volume fraction for a variety of heating rates and isothermal holding temperatures is presented.
机译：提出了适用于多组分系统中移动界面的扩散方程的一般解。用描述多组分热力学平衡的化学势方程同时解决该问题，从而确保界面处的局部平衡。不论系统中的溶质数量及其扩散系数的差异如何，都严格地将相动力学和热力学联系在一起。与其他方法相比，方程的数学紧凑性提高了计算速度。该模型用于计算具有四个或更多组件的TRIP和双相钢的再强化动力学。给出了各种加热速率和等温保温温度下铁素体，渗碳体和奥氏体组成以及体积分数的进展。

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