DESIGN OF AL3(TI,V,ZR) SYSTEMS THROUGH PHASE-STABILITY CALCULATIONS

Abstract

For many purposes, a fundamental basis for understanding a material's microstructure, and hence properties, can be found in alloy thermodynamics. An understanding of multicomponent phase equilibria can give specific data on which one can base alloy design decisions regarding modifications of existing alloys. Such an approach has been adopted in the present study to design Al3(Ti,V,Zr) intermetallic compounds. The compositions of Al3(Ti,V,Zr) intermetallic compounds were optimized in terms of the melting point, competition between D0(22) and D0(23) phases, specific gravity and another property such as tetragonality ratio which seems to be partially related to the ductility. This approach is suggested as a guide for alloy development.