Thermodynamics of solute distributions between solid and liquid phases in iron-base ternary alloys.

Abstract

The equilibrium distribution coefficients ko for some solutes in iron-base ternary alloys have been experimentally investigated. The mechanisms of these solute distributions between solid and liquid phases were also discussed on the basis of thermodynamics.The experimental results show that ko of Ni increases and ko of V decreases with the increasing carbon content, and the distributions of C in Fe-C-Ni and Fe-C-V alloys differ little from those in Fe-C binary alloys. This effect of carbon on kos of Ni and V could be thermodynamically explained by using the interaction parameter, the activity coefficient and so on.And also, the effects of various alloying elements on the equilibrium distributions of nitrogen and hydrogen were discussed thermodynamically.