Directional solidification and phase equilibria in the Ni-Al system
A method for the optimization of a phase diagram on the basis of results from directional solidification experiments is proposed. The experimental microstructure selection map is compared with a calculated map and the input parameters are varied until a satisfactory agreement is obtained. The calculation of the microstructure selection map is based on the maximum temperature criterion and on analytical models for the growth of plane front, dendritic, and eutectic structures. This method is applied to the Ni-Al system where the phase equilibria close to the melting point of the {gamma}{prime}-Ni{sub 3}Al phase have been subject to discussion for over 50 years. A new version of this part of the phase diagram is proposed, which is coherent with the results from directional solidification experiments.
- Research Organization:
- Univ. of Cambridge (GB)
- OSTI ID:
- 20005983
- Journal Information:
- Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Journal Name: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Journal Issue: 12 Vol. 30; ISSN 1073-5623; ISSN MMTAEB
- Country of Publication:
- United States
- Language:
- English
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