Many formulas have been developed to describe the mechanical properties of
various microstructures, but there have been relatively few attempts to com
bine such formulations directly with multicomponent phase diagram calculati
ons obtained by the CALPHAD technique. This paper describes some of the tec
hniques used in developing such a combined approach as part of a more compr
ehensive materials property program (MPP), The basic requirement is to desc
ribe the mechanical properties of the overall alloy by determining the effe
ct of each solute, and the grain size, on the mechanical properties of the
various phases in a multicomponent system. As some of the coefficients are
not readily available, methods have to be evolved that echo problems alread
y faced by the CALPHAD community with respect to characterizing the thermod
ynamics of metastable phases. It will be shown how the inter-relation of va
rious mechanical properties, such as yield strength and hardness, can also
be used to produce self-consistent data. The promising results obtained for
dual-phase materials can be considered a firm Foundation for future work o
n more complex systems.