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.
Similar content being viewed by others
References
G. Lutjering and S. Weissmann:Acta Met., 1970, vol. 18, pp. 785–95.
A. Gysler and S. Weissmann:Mater. Sci. Eng., 1977, vol. 27, pp. 181–93.
T. Hamajima, G. Lutjering, and S. Weissmann:Met. Trans., 1973, vol. 4, pp. 847–56.
M. Hida and S. Weissmann:Met. Trans. A, 1975, vol. 6A, pp. 1541–46.
Ge Dhzhi-Min and E. N. Pylaeva:Titanium and its Alloys, I.I. Kornilov, ed., pp. 11–23, Israel Programme for Scientific Trans- lations, Jerusalem, 1966.
J. B. McAndrew and H. D. Kessler:J. Metals, Oct. 1956, vol. 8, pp. 1348–53.
D. Schechtman, M. J. Blackburn, and H. A. Lipsitt:Met. Trans., 1974, vol. 5, pp. 1373–81.
H. A. Lipsitt, D. Schechtman, and R. E. Schafrik:Met. Trans. A, 1975, vol. 6A, pp. 1991–96.
E. S. Bumps, H. D. Kessler, and M. Hansen:Trans. AIME, 1952, vol. 194, pp. 609–14.
M. Hansen:Constitution of Binary Alloys, p. 139, McGraw-Hill, New York, 1958.
H. Margolin:Metals Handbook, vol. 8 (8th edition), p. 264, ASM, Metals Park, OH, 1973.
E. Ence and H. Margolin:Trans. TMS-AIME, 1961, vol. 221, pp. 151–57.
M. J. Blackburn and J. C. Williams:Trans. TMS-AIME, 1967, vol. 239, pp. 287–88.
D. Banerjee: Ph.D. Thesis, Indian Institute of Science, Bangalore, India, 1979.
M. J. Blackburn:The Science, Technology and Application of Titanium, R. I. Jaffee and N. E. Promisel, eds., p. 640, Pergamon Press, London, 1970.
A. Prince:Alloy Phase Equilibria, p. 153, Elsevier, London, 1966.
M. Hansen:Constitution of Binary Alloys, p. 976, McGraw-Hill, New York, 1958.
A. Prince:Alloy Phase Equilibria, p. 146, Elsevier, London, 1966.
E. S. Bumps, H. D. Kessler, and M. Hansen:Trans. ASM, 1953, vol. 45, pp. 1008–28.
C. S. Barrett:Structure of Metals, pp. 229–30, McGraw-Hill, London, 1952.
A. Prince:Alloy Phase Equilibria, p. 230, Elsevier, London, 1966.
H. Bohm and K. Lohberg:Z. Metallkunde, 1958, vol. 49, pp. 173–78.
T. Hamajima, G. Lutjering, and S. Weissmann:Met. Trans., 1972, vol. 3, pp. 2805–10.
E. K. Molchanova:Phase Diagrams of Titanium Alloys, p. 169, Israel Programme for Scientific Translation, Jerusalem, 1965.
Author information
Authors and Affiliations
Additional information
Formerly with the Indian Institute of Science, Bangalore, India
Formerly with the Department of Metallurgy, Indian Institute of Science, Bangalore 560012, India
Rights and permissions
About this article
Cite this article
Banerjee, D., Krishnan, R.V. & Vasu, K.I. A reconsideration of phase relations in the Ti-Al-Mo and Ti-Al systems. Metall Trans A 11, 1095–1105 (1980). https://doi.org/10.1007/BF02668133
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02668133