PHASE-TRANSITIONS AND PHASE-DIAGRAMS FOR LIQUID IRON-BASED MELTS

Investigations of the magnetic susceptibility for Fe-B (up to 15 at.%) and Fe-C (up to 2.0 wt.%) alloys were carried out in a wide temperatu re range. Some anomalies on (X)(T) curves were fixed and the kinetics of the crystallization versus melt structure was analyzed. The results are discussed in the suggestion that near liquidus we have two-struct ural melts. there exist microdomains enriched by the impurity element and the microareas of dilute solution of C(B) in Fe. For the latter, s tructural transformations similar to phase transitions in solids and c onnected with short-range order change could be realized. In the frame work of local state representations of statistical mechanics, the nece ssary calculations were done and the lines of structural transformatio n in liquid phase were plotted. (C) 1997 Elsevier Science S.A.