Analysis of interdiffusion in multicomponent alloys

Theoretical, numerical and computational modelling of the interdiffusion analysis is the major part of the diffusion and diffusion-related fields of research. In this study, general approaches for the analysis of the interdiffusion composition profiles as well as interdiffusion coefficients are investigated for solid metallic alloy systems where the number of atomic components n≥3. The main focusing of the present dissertation is to analyse the interdiffusion phenomenon for ternary, quaternary and quinary (high entropy alloys) metallic systems making use of numerically and analytically for the closed form solutions. For the ternary and quaternary metallic system composition independent interdiffusion coefficients are used mainly for the detailed study of diffusion behaviour. In quinary metallic system composition dependent (as well as composition independent) interdiffusion matrices are used for the detailed study of CoCrFeMnNi HEAs. MATLAB programming language is used as the main tool for investigating the interdiffusion phenomenon in the different metallic system. Finally, the results obtained are compared with the available experimental data.