Abstract
Employing Thermo-Calc software in conjunction with the SGTE database, [1997Du] computed the phase equilibria and plotted projections of the univariant liquidus lines, with the V content of the liquid on the x-axis and temperature on the y-axis, as shown in Fig. 1. When no univariant liquidus line lies below the five-phase invariant plane (indicated by a horizontal broken line passing through a dot in Fig. 1), the dot corresponds to the minimummelting liquid composition and temperature. This point is E in Fig. 1 and is at 1063 C with ~ 0.45 wt.% V in liquid. The corresponding overall composition of the alloy was not given by [1997Du]. A partial reaction sequence written by [1997Du] is given in Fig. 2. The five-phase invariant reactions are indicated in bold italics. Equilibria between all solid phases resulting from the five-phase invariant reactions are omitted in Fig. 2. [1997Du] extended the calculations to the C-Cr-Fe-Mo-V quinary system and found no minimum-melting eutectic composition in the five-component system other than that given above for the C-Fe-Mo-V subsystem.
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