Abstract
The solidification and cooling of the nickel-base alloy CMSX-4 during casting was simulated using a one-dimensional model for diffusion-controlled phase transformations. A temperature interval from the liquidus temperature to 800 K is covered, including solid state transformations. This paper discusses several results: fraction solid compared to results from Scheil and equilibrium calculations, microsegregation profiles for Al, Co, Cr, Re, Ta, Ti and W compared to experimental values, and the formation of finely dispersed γ′-phase in the solid state. The relatively simple one-dimensional diffusion simulation is shown to be a valuable tool to investigate phase formation and microsegregation during solidification and cooling. In the case of CMSX-4 it represents a significant improvement over the commonly used Scheil calculations for the prediction of the fraction solid.
Original language | English |
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Pages (from-to) | 385-390 |
Number of pages | 6 |
Journal | Materials Science and Engineering A |
Volume | 397 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 25 Apr 2005 |
Keywords
- CMSX-4
- Dictra
- Microsegregation
- Simulation
- Solidification
- Thermo-Calc
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering