Conference proceeding
Quantitative modeling of binary alloy solidification with coupled heat and solute diffusion via the phase-field method dendritic crystal growth dynamics
41st AIAA Aerospace Sciences Meeting & Exhibit, Reno, NV; UNITED STATES; 6-9 Jan. 2003
AIAA Aerospace Sciences Meeting, 41 (Reno, Nevada, USA, 01/06/2003 - 01/09/2003)
01/06/2003
DOI: 10.2514/6.2003-816
Abstract
A phase-field model for coupled heat and solute diffusion phase change problems involving binary alloys is developed. A thin-interface result is presented that allows calculations to be performed using interface thicknesses larger than the capillary length but smaller than the diffusion lengths. The model is valid for different thermal and liquid mass diffusivities and vanishing mass diffusivity in the solid. In addition, solute trapping and interface kinetic effects can be eliminated. The model reduces to a pure substance model for vanishing concentration and also reduces to an isothermal alloy model for an infinitely large ratio of the thermal to the liquid mass diffusivity. Excellent agreement with simple analytical solutions is shown for even large thermal to liquid mass diffusivity ratios and a range of solute concentrations. Sample 2D thermosolutal dendritic growth calculations are presented that demonstrate independence of the results on the interface thickness. (Author)
Details
- Title: Subtitle
- Quantitative modeling of binary alloy solidification with coupled heat and solute diffusion via the phase-field method dendritic crystal growth dynamics
- Creators
- J RamirezChristoph Beckermann
- Resource Type
- Conference proceeding
- Publication Details
- 41st AIAA Aerospace Sciences Meeting & Exhibit, Reno, NV; UNITED STATES; 6-9 Jan. 2003
- Conference
- AIAA Aerospace Sciences Meeting, 41 (Reno, Nevada, USA, 01/06/2003 - 01/09/2003)
- DOI
- 10.2514/6.2003-816
- ISSN
- 0146-3705
- Language
- English
- Date published
- 01/06/2003
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984201540902771
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