A general method for calculating deviation from local equilibrium at phase interfaces

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• 作者：Odqvist ; J. ; Sundman ; B. ; Å ; gren ; J.
• 关键词：Diffusion ; Thermodynamics ; Solute drag ; Partitionless transformation
• 刊名：Acta Materialia
• 出版年：2003
• 出版时间：February 25, 2003
• 年：2003
• 卷：51
• 期：4
• 页码：1035-1043
• 全文大小：105 K

文摘

A general method to calculate the deviation from local equilibrium at phase interfaces in multicomponent systems is suggested. The deviation is caused by solute drag and finite interfacial mobility. In the limit of low transformation rates the new method degenerates to the well-known local equilibrium condition. The phase interface is divided into three zones, each with a finite thickness. In each zone a variation in thermodynamic properties and diffusional mobilities is assumed.