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Phase Transformation Kinetics During Precipitation of an Ordered Intermetallic from a Disordered Matrix -a Computer Simulation

Published online by Cambridge University Press:  26 February 2011

Long-Qing Chen  and
A.G. Khachaturyan
Long-Qing Chen
Affiliation:
Department of Mechanics and Materials Science, Rutgers University, P.O. Box 909, Piscataway, NJ 08855
A.G. Khachaturyan
Affiliation:
Department of Mechanics and Materials Science, Rutgers University, P.O. Box 909, Piscataway, NJ 08855
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Abstract

The precipitation kinetics of an ordered intermetallic from a disordered matrix, which involves simultaneous ordering and decomposition, is studied by a computer simulation technique based on the microscopic diffusion theory. It is found that the precipitation starts from a congruent ordering transition, which may be continuous or nucleation and growth. This congruent ordering transition transforms the initially disordered state into a single phase nonstoichiometric ordered state with antiphase domains. The next stage is the decomposition which starts from the antiphase domain boundaries and then propagates into the ordered domains. And the final process is the coarsening of the order/disorder two-phase mixture. The predicted kinetics of precipitation is in excellent agreement with recent experimental observations in important alloy systems.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 205: Symposium F – Kinetics of Phase Transformations , 1990 , 351
Copyright
Copyright © Materials Research Society 1992

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References

1. Sato, T., Tanaka, N. and Takahashi, T., Trans. of Japan Inst. of Metals, 29, 17 (1988).CrossRefGoogle Scholar
2. Radmilovich, M., Fox, A. G. and Thomas, G., Acta Met. 37, 2385 (1989).CrossRefGoogle Scholar
3. Shaiu, B.-J., Li, H.-T., and Chen, Haydn, in Proc. for the Fifth International Conf. on AI-Li, Williamsburgh, PA, 1989.Google Scholar
4. Corey, C. L. and Lisowski, B., Trans. Metall. Soc. AIME, 239, 239 (1967).Google Scholar
5. Corey, C. L., Rosenblum, B. Z. and Greene, G. M., Acta Met. 21, 837 (1973).Google Scholar
6. Matsumura, S., Oyama, H., and Old, K., Mater. Trans., JIM, 30, 695 (1989).Google Scholar
7. Semenovskaya, S. V.., Phys. Stat. Sol. (b) 64, 291 (1974).Google Scholar
8. Allen, S. M. and Cahn, J. W., Acta Met. 24, 425 (1976).Google Scholar
9. Soffa, W. A. and Laughlin, D. E., Solid-Solid Phase Transformations, ed. Aaronson, M., Laughlin, D. E. and Wayman, C. M., TMS-AIME, 159 (1981).Google Scholar
10. Kubo, H. and Wayman, C.M., Acta Met. 28, 398 (1980).Google Scholar
11. Khachaturyan, A. G., Lindsey, T. F. and Morris, J. W. Jr., Met. Trans. 19A, 249 (1988).Google Scholar
12. Soffa, W. A. and Laughlin, D. E., Acta Met. 37, 3019 (1989).Google Scholar
13. Khachaturyan, A. G., Sov. Phys. Solid State, 9, 2040 (1968).Google Scholar
14. Chen, L. Q. and Khachaturyan, A. G., to appear in Script Meta. et. Maters.Google Scholar
15. Chen, L. Q. and Khachaturyan, A. G., to appear in Script Meta. et. Maters.Google Scholar
16. Matsumura, S., Tanaka, Y., Tankano, K. and Old, K., Presented in the NIRM Workshop on Computational Materials Science, August 23-24, 1990, Tsukuba Science City, Japan (preprint).Google Scholar
17. Khachaturyan, A. G., Theory of Structural Transformations in Solids, Wiley & Sons, New York (1983).Google Scholar
18. Chen, L. Q. and Khachaturyan, A. G., submitted to Acta Meta et Maters.Google Scholar