Experimental and Thermodynamic Study of the Microstructure of Tantalum containing Nickel-base Alloys at High Temperature
Résumé
Experiments and thermodynamic calculations were performed on three nickel-base alloys containing chromium, carbon and tantalum. Solidus and liquidus temperatures, natures and surface fractions of the carbides after an exposure for 100 hours at 1000°C, 1100°C and 1200°C, were determined for each alloy. These results are compared with calculated results, using a thermodynamic database. A good agreement was generally found for the solidus temperatures but less for the liquidus ones. For alloys containing chromium carbides alone, carbides fractions and matrix compositions correspond to calculation results. But the presence of tantalum carbides in the third alloy was not predicted by calculations.
Origine : Fichiers produits par l'(les) auteur(s)
Loading...