Metallurgical Transactions A

, 11:1095

A reconsideration of phase relations in the Ti-Al-Mo and Ti-Al systems

Authors

  • D. Banerjee
    • Defence Metallurgical Research Laboratory
  • R. V. Krishnan
    • National Aeronautical Laboratory
  • K. I. Vasu
    • University of Cochin
Alloy Phases and Structure

DOI: 10.1007/BF02668133

Cite this article as:
Banerjee, D., Krishnan, R.V. & Vasu, K.I. MTA (1980) 11: 1095. doi:10.1007/BF02668133

Abstract

A microstructural and X-ray investigation of Ti-AI-Mo alloys Ti-31 Al-15 Mo, Ti-31 Al-13 Mo, Ti-31Al-9Mo and Ti-35Al-9Mo (containing the Ti3Al, TiAl and β phases) indicates that the existing phase diagram of the ternary system for this composition range published by Ge Dhzhi-Min and Pylaeva is in error above 1473 K. An analysis of phase relations reveals that the error has arisen from their use of the Ti-AI diagram due to Bumps, Kessler and Hansen as a basis for generating the ternary. It is shown that a phase diagram of the ternary, consistent with the experimental results, can be generated using a version of the Ti-AI system due to Margolin. Simple geometric arguments are used to build up a new semi-quantitative description of the Ti-AI-Mo system which can be used as a basis for a detailed investigation of phase equilibria in this system.

Copyright information

© American society for metals and the metallurgical society of AIME 1980