Abstract
Among the high temperature materials γ + α2 Ti aluminide is the most promising material, which has unique characteristics of low density coupled with high temperature properties. However, the low room temperature ductility of the alloy has limited its commercial application. Many studies have been carried out on this alloy to understand the phase transformation and role of alloying elements. Several processing methodologies have been attempted and advantages of various routes have been explored. However, poor ductility at room temperature is still a concern. In the present paper a thorough review of relevant studies has been carried out and viable route for industrial processing has been suggested. This paper includes theoretical concepts behind limited ductility of alloy at room temperature and its processing difficulty through the conventional methods. Modification in binary Ti aluminide alloy through alloying addition, selection of suitable processing route and heat treatment are noted as important areas which can provide a practical solution for this alloy to bring it to industrial processing and application.
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