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Phase-Field Modeling as a Method Relevant for Modeling Phase Transformation During Interdiffusion

Choudhury, Abhik (2017) Phase-Field Modeling as a Method Relevant for Modeling Phase Transformation During Interdiffusion. [Book Chapter]

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Official URL: https://doi.org/10.1016/B978-0-12-804287-8.00007-5


Phase-field modeling has developed as an important tool in investigating microstructural evolution in a variety of phenomena such as solidification, solid-state phase transformations, electrochemical reactions, mechanical deformation and fracture processes, and also domain evolution in ferro-electric materials. Given the strong thermodynamic basis for the formulation of these models, they can be used to obtain strong predictions about structural pattern formation as a function of the material processing parameters. In this chapter, I will first give a brief history of the evolution in phase-field modeling, thereafter discuss the ingredients of a particular phase-field formulation, starting from the construction of the functional and the eventual derivation of the evolution equations of the order-parameters and the relevant state-variables. I will then utilize the formulation to highlight, how some of the phenomena regarding interdiffusion in a diffusion couple can be captured. Subsequently, I will place the model in the context of modeling real alloys with the incorporation of thermodynamic information from CALPHAD databases and mobilities from kinetic databases.

Item Type: Book Chapter
Publisher: Elsevier
Additional Information: The copyright for this article belongs to the Elsevier.
Keywords: Chemical potential; Diffuse interfaces; Diffusion-coupled phase transformations; Equilibrium defects; Free energy functionals; Interface width; Kinetic defects; Mesoscopic formulations; Mesoscopic model formulations; Microscopic formulation; Order parameter
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 29 May 2022 08:39
Last Modified: 31 May 2022 00:53
URI: https://eprints.iisc.ac.in/id/eprint/72795

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