In recent years themrodynamic modelling via the CALPHAD method has been extentively applied to industrial alloys of many types. Although pertaining to equilibrium conditions, use has shown that valuable information can be gained for a variety of practical applications. A papoer presented at the last Seven Springs metting gave some theoritical background to the CALPAD method and described the development of t he methodology to Ni-based superalloys. The amin purpose of that paper was to provide validation of results against an extensive experimental iterature which, at the time, concentrated by gamma / gamma ' equilibria and liquid/solid equilibria. The present paper will present an extension of the validation process to take into account eta formation and provide a review and examples of the practical application of the CALPHAD method to indistrial alloys. It will expand on some of the topics briefly raised in the previous paper and demonstrate that the CALPHAD route is readily extendable to conditions that depart from equilibrium. It will also be shown that it can be used to provide fundamental input for calculations of physical and mechanical properties.
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