Title
Phase Field Modeling Of Interdiffusion Microstructure In Ni-Cr-Al Diffusion Couples
Keywords
Interdiffusion microstructure; Multiphase diffusion couples; Phase field modeling
Abstract
Evolution of interdiffusion microstructures was examined in ternary Ni-Cr-Al solid-to-solid diffusion couples using two-dimensional (2D) phase field simulation. Utilizing Cahn-Hilliard and Allen-Cahn equations, multiphase diffusion couples containing of fcc-γ and B2-β solid solution phases were simulated with alloys of different compositions and phase contents. Chemical mobility as a function of composition with constant gradient energy coefficients was used in the simulation. Simulated microstructures in γ+β/γ and γ+β/γ+β diffusion couples were compared with the experimental microstructures reported in literature. As observed experimentally, the model predicted the recession of γ+β region in the γ+β/γ couple and a stationary interface in γ+β/γ+β couple. Concentration profiles developed across the diffusion couples demonstrated that the interdiffusion occurs in the γ phase as well as in the γ+β region. Formation of single-phase γ and β layers near the interface of γ+β/γ+β couples was also investigated using the volume fraction profile obtained from the simulated microstructure.
Publication Date
1-1-2008
Publication Title
Materials Science Forum
Volume
595-598 PART 1
Number of Pages
199-206
Document Type
Article; Proceedings Paper
Personal Identifier
scopus
DOI Link
https://doi.org/10.4028/www.scientific.net/msf.595-598.199
Copyright Status
Unknown
Socpus ID
58149119280 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/58149119280
STARS Citation
Mohanty, R. R. and Sohn, Y. H., "Phase Field Modeling Of Interdiffusion Microstructure In Ni-Cr-Al Diffusion Couples" (2008). Scopus Export 2000s. 10801.
https://stars.library.ucf.edu/scopus2000/10801