Diffusion coefficients for modeling the heat treatment of Ti-6Al-4V
- PDF / 241,905 Bytes
- 4 Pages / 608.4 x 786 pts Page_size
- 69 Downloads / 167 Views
8/11/04
4:26 AM
Page 3015
quantities between the thermal analysis and resistivity data. These issues need to be resolved first. In conclusion, a method for evaluating aging precipitation kinetics and potential using DSC curves without the need for peak separation or considering individual precipitation phases is possible, if accurate calorimetry data are available. REFERENCES 1. S. Esmaeili, X. Wang, D.J. Lloyd, and W.J. Poole: Metall. Mater. Trans. A, 2003, vol. 34A, pp. 751-63. 2. M.J. Starink and S.C. Wang: Acta Mater., 2003, vol. 51, pp. 5131-50. 3. G. Riontino, M. Massazza, and S. Abis: J. Mater. Res., 2003, vol. 18, pp. 1522-27. 4. J.D. Bryant: Metall. Mater. Trans. A, 1999, vol. 30A, pp. 1999-2006. 5. J.M. Papazian: Metall. Trans. A, 1981, vol. 12A, pp. 269-80. 6. J.M. Papazian, R.J. DeIasi, and P.N. Adler: Metall. Trans. A, 1980, vol. 11A, pp. 135-40. 7. J.-H. Hsieh and C.-G. Chao: Mater. Sci. Eng. A, 1996, vol. A214, pp. 133-38. 8. I. Dutta and S.M. Allen: J. Mater. Sci. Lett., 1991, vol. 10, pp. 323-26. 9. D.S. Thompson: Thermal Analysis, Academic Press, New York, NY, 1969, vol. 2, pp. 1147-70. 10. I.N.A. Oguocha and S. Yannacopoulos: J. Mater. Sci., 1996, vol. 31, pp. 3145-51. 11. M.-C. Chou and C.-H. Chao: Metall. Mater. Trans. A, 1996, vol. 27A, pp. 2005-12. 12. E. Donoso: Mater. Sci. Eng., 1985, vol. 74, pp. 39-46. 13. J.M. Papazian: Metall. Trans. A, 1982, vol. 13A, pp. 761-69. 14. R. DeIasi and P.N. Adler: Metall. Trans. A, 1977, vol. 8A, pp. 1177-83. 15. R. DeIasi and P.N. Adler: Metall. Trans. A, 1977, vol. 8A, pp. 1185-90. 16. A.K. Jena, A.K. Gupta, and M.C. Chaturvedi: Acta Metall., 1989, vol. 37, pp. 885-95. 17. P. Alder, G. Geschwind, and R. DeIasi: Thermal Analysis, Proc. 3rd ICTA, Davos, 1971, vol. 2, pp. 747-57. 18. A. Gaber, N. Afify, A.Y. Abdel-Latief, and M.S. Mostafa: Solid State Commun., 1993, vol. 86, pp. 679-83. 19. A. Gaber and N. Afify: J. Mater. Sci., 1992, vol. 27, pp. 1347-52. 20. H. Inoue, T. Sato, Y. Kojima, and T. Takahashi: Metall. Trans. A, 1981, vol. 12A, pp. 1429-34.
Diffusion Coefficients for Modeling the Heat Treatment of Ti-6Al-4V S.L. SEMIATIN, T.M. BROWN, T.A. GOFF, P.N. FAGIN, D.R. BARKER, R.E. TURNER, J.M. MURRY, J.D. MILLER, and F. ZHANG Values of the diffusivity of aluminum and vanadium that can be used for engineering-oriented calculations of the diffusional growth of primary alpha during the heat treatment of Ti-6Al-4V were established using diffusion couples consisting of various Ti-Al-V alloys. After taking compositional influences into account using thermodynamic correction fac-
tors, the pertinent diffusivities in the ternary alloy were found to be approximately 80 pct of those previously estimated from tracer or impurity (binary) diffusion experiments.
A wide range of properties can be developed in alpha/beta titanium alloys such as Ti-6Al-4V via thermomechanical processing of conventional ingot-metallurgy products. The principal objective of primary mill processing is to develop a uniform, fine microstructure of equiaxed, primary alpha in a matrix o
Data Loading...
