Design of Ni-Base Superalloys
Computer models for designing Ni-base superalloys have been developed. A mathematical model using regression equations based on microstructure and property databases has been established and successfully applied to alloy developments. Several types of Ni-base superalloys including new generation single crystal (SC) superalloys have been designed using the model. Evaluation tests have shown their superior high temperature properties.
A theoretical modeling of equilibrium states in multi-component Ni-base superalloys has also become possible by employing statistical thermodynamics with using interatomic potentials, namely, cluster variation method (CVM). The γ and γ′ phase compositions, site occupations of alloying elements in the phases, lattice parameters, and so on were calculated self-consistently and successfully verified using atom-probe field ion microscopy (APFIM). The same set of interatomic potentials are used in Monte Carlo simulation (MCS) of microstructural evolution in multi-component Ni-base superalloys.
An open laboratory for materials design (OLMD), which enables one to use our computer models and databases within NRIM for superalloys, is now open to the public on our world wide web (WWW) site.
KeywordsBurner Entropy Titanium Carbide Enthalpy
Unable to display preview. Download preview PDF.
- 1.H. Harada, M. Yamazaki, Y. Koizumi: Tetsu to Hagane (in Japanese), 65, 1049 (1979).Google Scholar
- 4.W. J. Boesh, J. S. Slaney: Met. Prog., 86, 109 (1964).Google Scholar
- 7.Y. Murata, S. Miyazaki, M. Morinaga, R. Hashizume: Superalloys 1996, Proceedings of the 8th International Symposium on Superalloys (The Metallurgical Society), p.61.Google Scholar
- 8.R. L. Dreshfield: Met. Trans., 2, 1341 (1971).Google Scholar
- 10.H. Harada, M. Yamazaki: Tetsu to Hagane (in Japanese), 65, 1059 (1979).Google Scholar
- 12.H. Harada, K. Ohno, T. Yamagata, T. Yokokawa, M. Yamazaki: Superalloys 1988, Proceedings of the 6th International Symposium on Superalloys (The Metallurgical Society), p.733.Google Scholar
- 13b.L. Kaufmann and H. Nesor: Metall. Trans., 6A, 2115 (1975);Google Scholar
- 13c.L. Kaufmann and H. Nesor: Metall. Trans., 6A, p.2123 (1975).Google Scholar
- 14.N. Saunders: Superalloys 1996, Proceedings of the 8th International Symposium on Superalloys (The Minerals, Metals & Materials Society), p.101.Google Scholar
- 20.H. Harada, T. Yokokawa, K. Ohno, T. Yamagata, M. Yamazaki: Proceedings of a Conference on High Temperature Materials for Power Eng. 1990, Liège, Belgium, 24–27 Sept. 1990, p.1319.Google Scholar
- 21.H. Harada, T. Yamagata, T. Yokokawa, K. Ohno, M. Yamazaki: Proceedings of the 5th International Conference on Creep and Fracture of Eng. Materials and Structures, Swansea, 28th March-2nd April, 1993 (The Institute of Materials), p.255.Google Scholar
- 22.M. Yamazaki: Alloy Design of Nickel-base Superalloys and Titanium Alloys, Prog. Powder Metall., 41, 531 (1989).Google Scholar
- 23.K. Kobayashi, Y. Koizumi, S. Nakazawa, T. Yamagata, H. Harada: Proceedings of the 4th International Charles Parsons Turbine Conference, Newcastle upon Tyne, U.K., 4th–6th November, 1997 (The Institute of Materials), p.766.Google Scholar
- 24.M. Enomoto, H. Harada, H. Murakami: Tetsu to Hagane (in Japanese), 80, 487 (1994).Google Scholar
- 29.H. Murakami, Y. Saito, H. Harada: Superalloys 1996, Proceedings of the 8th International Symposium on Superalloys (The Minerals, Metals & Materials Society), p.249.Google Scholar
- 31.M. Fujita, T. Yokokawa, T. Noda: Proceedings of a Conference on Intelligent Software Systems in Inspection and Life Management of Power and Process Plants, SMiRT Post Conference Seminar No. 13, Paris, Aug. 25–27, 1997, p.33.Google Scholar