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Phase-Field Simulation of D03-Type Antiphase Boundary Migration in Fe3Al with Vacancy and Solute Segregation

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Abstract:

Segregation of solute atoms and vacancies to migrating D03–type antiphase boundaries (APBs) in Fe3Al of the stoichirometric and an Al-rich compositions has been investigated in detail by a phase-field method developed in the previous study [Koizumi et al. Acta Mater 2009;57:3039] focusing on the quantitative relationship among the segregation, APB energy, driving-force, drag-force and APB mobility. It has been revealed that the drag-force by solute segregation depends considerably on the alloy composition and is responsible for the significant composition dependence of the migration kinetics of D03-APB whereas the composition dependences of driving-force and mobility are negligibly small.

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Info:

Periodical:

Solid State Phenomena (Volumes 172-174)

Pages:

1313-1319

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.172-174.1313

Citation:

Cite this paper

Online since:

June 2011

Authors:

Yuichiro Koizumi, Samuel M. Allen, Masayuki Ouchi, Yoritoshi Minamino, Akihiko Chiba

Keywords:

Intermetallic, Order-Disorder Transformation, Phase-Field Method, Solute-Drag

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