Homogenizing a Nickel-Based Superalloy: Thermodynamic and Kinetic Simulation and Experimental Results

If the chemical inhomogeneity profile is known a priori , kinetic modeling software such as diffusion-controlled transformations (DICTRA) can be used to model the homogenization kinetics of an alloy. In this study, the Scheil module within the Thermo-Calc software was used to predict the as-cast seg...

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Veröffentlicht in:	Metallurgical and Materials Transactions B 2009-04, Vol.40 (2), p.182-186
Hauptverfasser:	Jablonski, Paul D., Cowen, Christopher J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Alloys Applied sciences CASTING Characterization and Evaluation of Materials Chemistry and Materials Science Exact sciences and technology HEAT RESISTING ALLOYS HEAT TREATMENTS Homogenization KINETICS MATERIALS SCIENCE Metallic Materials Metals. Metallurgy MICROSTRUCTURE Nanotechnology NIMONIC 105 Production of metals SEGREGATION SIMULATION Structural Materials Surfaces and Interfaces THERMODYNAMICS Thin Films TRANSFORMATIONS VERIFICATION
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Beschreibung
Zusammenfassung:	If the chemical inhomogeneity profile is known a priori , kinetic modeling software such as diffusion-controlled transformations (DICTRA) can be used to model the homogenization kinetics of an alloy. In this study, the Scheil module within the Thermo-Calc software was used to predict the as-cast segregation present within the Ni-based superalloy Nimonic 105. The segregation profiles were read into DICTRA to refine the homogenization heat treatment of this alloy. The thermodynamic and kinetic modeling of the computationally predicted heat treatment and microstructure, and subsequent experimental verification on a real casting of Nimonic 105, are presented.
ISSN:	1073-5615 1543-1916
DOI:	10.1007/s11663-009-9227-1