Growth morphologies in peritectic solidification of Fe–C: A phase-field study
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- 作者：Abhik Choudhury ; Britta Nestler ; Abhishek Telang ; Michael Selzer ; Frank Wendler
- 关键词：Phase field ; Diffusion ; Peritectic ; Nucleation ; Surface energy
- 刊名：Acta Materialia
- 出版年：2010
- 出版时间：June 2010
- 年：2010
- 卷：58
- 期：10
- 页码：3815-3823
- 全文大小：634 K
文摘
We use a thermodynamically consistent multi-phase, multi-component phase-field model, where the evolution equations for the different fields are derived from an entropy functional, for simulating peritectic growth structures in two and three dimensions. Different solidification morphologies are obtained in the computations and the characteristic properties of the growth forms are discussed. The phase-field method allows for a prediction of the surface energies in the three-phase system δ-ferrite, γ-austenite and liquid based on comparison between experimentally observed and simulated structures. Additionally an investigation of possible nucleation sites in evolving domains is presented and its dependence on the solid–solid surface energy is examined.