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Effect of the Compositional Strain on the Diffusive Interface Thickness and on the Phase Transformation in a Phase-Field Model for Binary Alloys

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Abstract

A Cahn-Hilliard phase-field—elasticity model was used to study the effect of compositional strain on the diffusive interface thickness and on the solid state phase transformations in binary alloys. Compositional strain was introduced using the Vegard’s law. Mixed order finite element analyses and analytical solutions of an infinite diffusion couple with a flat interface were used to track the phase-field interface morphology. Both analytical and numerical calculations showed a substantial rate-increasing effect of compositional strain on the interface thickness, especially for low energy barrier values. Compositional strain was found to cause substantial patterning of single precipitates during their evolution in a parent matrix and significantly change the equilibrium size of the precipitates. Results show a considerable influence of compositional strain on the coarsening kinetics of coherent precipitates.

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Authors and Affiliations

  1. Center for Advanced Vehicular Systems, Mississippi State University, Starkville, MS, 39759, USA

    Mohsen Asle Zaeem, Haitham El Kadiri, Mark F. Horstemeyer & Paul T. Wang

  2. Mechanical Engineering Department, Mississippi State University, Starkville, MS, 39759, USA

    Haitham El Kadiri & Mark F. Horstemeyer

  3. School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, 99164, USA

    Sinisa Dj. Mesarovic

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  1. Mohsen Asle Zaeem
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  2. Haitham El Kadiri
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  3. Sinisa Dj. Mesarovic
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  4. Mark F. Horstemeyer
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  5. Paul T. Wang
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Correspondence to Mohsen Asle Zaeem.

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Asle Zaeem, M., El Kadiri, H., Mesarovic, S.D. et al. Effect of the Compositional Strain on the Diffusive Interface Thickness and on the Phase Transformation in a Phase-Field Model for Binary Alloys. J. Phase Equilib. Diffus. 32, 302–308 (2011). https://doi.org/10.1007/s11669-011-9905-y

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  • DOI: https://doi.org/10.1007/s11669-011-9905-y

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