Synthesis and phase equilibria studies on intermetallic aluminides based on titanium and niobium

Abstract

lntermetallic aluminides based on titanium and niobium have potential applications as high temperature materials in aerospace and automobile industries due to their high specific strength and high specific modulus. A knowledge of phase relations in the ternary Ti-AI -Nh alloys will help in developing suitable heat treatment cycles to meet the desired properties and also to predict the material behavior at high temperatures. Such comprehensive data in the Ti-Al-Nb system is available only at 1473 K while the expected temperature range of application for these alloys is 873 to 1271 K. This research project was aimed at determining the phase relations in Ti-AI-Nh system at 1273 K.