1. Fundamentals: alloy thermodynamics and kinetics of diffusion
- Author
-
Irina Roslyakova, Ingo Steinbach, and Katrin Abrahams
- Subjects
Superalloy ,Materials science ,Creep ,Kinetics ,Alloy ,engineering ,Thermodynamics ,Chemical stability ,Diffusion (business) ,engineering.material ,Microstructure ,CALPHAD - Abstract
The general mechanisms needed to understand thermodynamic and kinetic stability of the microstructure of superalloys are reviewed. Microstructural transformations during processing and service is described as a diffusion controlled transformation, where microstructural stability rests on slow diffusing elements and on a large partitioning of these elements between the phases. The theoretical tools for thermodynamic stability and diffusion are implemented in CALPHAD type data bases and softwares. The phase-field method, as the most advanced tools for simulation solidification, heat treatment and rafting under creep conditions, is shortly introduced.
- Published
- 2022