| Abstract Scope |
Mats Hillert often used the approximation that a migrating phase interface is in a state of thermodynamic equilibrium locally. It was then straight forward for him to account for additional physical effects, e.g. surface energy, coherency stresses etc. His analysis based on the local equilibrium approximation was very successful and lead to a number of important contributions.
However, already 1953, in one of his first reports, Mats defined rigorously the concept of paraequilibrium that had been introduced by Hultgren somewhat earlier. His approach was then used 1960 in his analysis of the growth of ferrite, bainite and martensite.
In this talk Mats Hillert’s approximations on the state of migrating phase interfaces and various examples will be discussed. |