Simulated Element Redistribution in Ni-based Superalloy Weldment

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Authors	BROŽ Pavel BURŠÍK Jiří SOPOUŠEK Jiří PICHA Radim
Year of publication	2002
Type	Article in Proceedings
Conference	Procedings of the VIII Seminar Diffusion and Themodynamics of Materials
MU Faculty or unit	Faculty of Science
Citation
Field	Physical chemistry and theoretical chemistry
Keywords	DICTRA;ThernoCalc;phase;diffusion
Description	The diffusion and phase precipitation processes in welded joints of pure Al-Cr-Ni system and low alloyed Al-Cr-Ni-X systems (where X means Co, W, or Ti) were simulated using CALPHAD method and DICTRA software focusing on the gama/gama' phase transformation. The equilibrium calculations allowed to predict phase diagram cross-sections for the Al-Cr-Ni-X systems. The performed simulations based on local equilibrium condition in diffusion couple enabled to describe the phase transformation process and obtain redistribution of alloying species, activity profiles, and other time-distance dependences for other relevant values in diffusion-affected zone of the Al-Cr-Ni / Al-Cr-Ni-X weldments.
Related projects:	Theoretical and experimental study of Ni-based model systems and thermodynamic description of phase equilibria