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Diffusion zone formation in aluminized MAR-247 from Bi-velocity Phase Field Method

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  • Wierzba, Bartek
  • Tkacz-Śmiech, Katarzyna

Abstract

The Bi-velocity Phase Field Method (BPFM), which allows a quantitative description of diffusion mass transport in multi-phase materials, is presented and applied to simulate formation of a diffusion zone in aluminized MAR-247. The method links the bi-velocity Darken approach with the phase-field model in which the diffusion zone is quantitatively characterized by phase volume fractions. Accordingly, composition dependent diffusivities in a two-phase region are defined. The present method allows calculation of element-distribution profiles and volume fractions of the phases across a diffusion couple. Hence, a diffusion path can be determined for three component systems and, besides, the average stress field and entropy production during diffusion can be calculated.

Suggested Citation

  • Wierzba, Bartek & Tkacz-Śmiech, Katarzyna, 2013. "Diffusion zone formation in aluminized MAR-247 from Bi-velocity Phase Field Method," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 392(5), pages 1100-1110.
    • Handle: RePEc:eee:phsmap:v:392:y:2013:i:5:p:1100-1110
    DOI: 10.1016/j.physa.2012.11.011
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