LIQUIDUS PROJECTION OF TI-AI-V SYSTEM BASED ON ARC MELTED AND CAST MICROSTRUCTURES

Are melted and cast microstructures of Ti-Al-Valloys containing 10-57 wt-%Al and 4-46 wt-%V have been characterised using optical, scanning, and transmission electron microscopy, and room temperature X-ray diff raction. Chemical compositions of the phases present have been determi ned using energy dispersive X-ray, and these results have been utilise d to plot a tentative non-equilibrium liquidus projection of the Ti-Al -V system. Five ternary peritectic reactions have been shown to be rep resented within the liquidus projection. These observations have been utilised to establish the solidification sequences of the Ti-Al-Valloy s considered.