Abstract
In order to estimate the thermodynamic interaction parameter Ω for the bcc phase of the binary system, the effect of the addition of a third element (Cr, Mn, V) on the order-disorder transition temperature (Tc) of the CsCl-type FeCo superlattice has been investigated by means of differential thermal analysis. Also the effect of Co addition on the miscibility gap in the Fe-Cr system has been investigated.
The Tc of the FeCo superlattice is lowered by the addition of Cr or V and raised by the addition of Mn. The critical temperature of the miscibility gap in the Fe-Cr system is raised by the addition of Co. From these experimental results, the following values of the parameters have been obtained:
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oindentBased on these parameters, some aging and transformation behaviors of Fe-Co-Cr, Fe-Co-Mn and Fe-Co-V alloys have been discussed.
