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Comparison of Experimental and Simulated Multicomponent Ni-base Superalloy Diffusion Couples

Published

Author(s)

Carelyn E. Campbell, J C. Zhao, M F. Henry

Abstract

A multicomponent diffusion mobility database for the Ni-rich fcc phase [2002Cam] is evaluated by comparing diffusion simulations to two experimental multicomponent Ni-base superalloy diffusion couples, Ni/Rene-88 and IN718/Rene-88. The diffusion simulations use composition-dependent thermodynamic and diffusion quantities with a finite difference code to simulate single phase and multiphase planar layers. The multiphase layers consist of a matrix phase and a disperse phase. The calculated composition profiles, interdiffusion coefficients, phase fraction profiles and location of Kirdendall porosity are compared to experimental results. To treat diffusion in the IN718 alloy, iron and carbon are added to the existing diffusion mobility database using previous assessment work and adding the Fe-Al and Fe-Co assessments.
Citation
Journal of Phase Equilibria and Diffusion
Volume
25
Issue
No. 1

Keywords

diffusion mobility, Fe-Al, Fe-Co, interdiffusion coefficients, Kirkendall porosity, multicomponent diffusion, Ni-base superalloy

Citation

Campbell, C. , Zhao, J. and Henry, M. (2004), Comparison of Experimental and Simulated Multicomponent Ni-base Superalloy Diffusion Couples, Journal of Phase Equilibria and Diffusion (Accessed April 15, 2024)
Created February 1, 2004, Updated February 17, 2017