Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-29T06:05:27.103Z Has data issue: false hasContentIssue false
  • English
  • Français

Calculation of Phase Competition and Selection in Solidification Using a Combined Nucleation and Calphad Approach

Published online by Cambridge University Press:  21 February 2011

G. Shao  and
P. Tsakiropoulos
G. Shao
Affiliation:
Department of Materials Science and Engineering University of Surrey, Guildford, Surrey GU2 5XH, UK
P. Tsakiropoulos
Affiliation:
Department of Materials Science and Engineering University of Surrey, Guildford, Surrey GU2 5XH, UK
Get access

Abstract

Thermodynamic data derived by the CALPHAD method has been extended to undercooled melts to study phase competition and the role of time dependent and steady state nucleation in rapidly solidified materials. The theoretical predictions made about phase competition between hcp α, bcc β and Ll0 γ in some Al(Ti,V) alloys are compared with experimental results. It is shown that high melt cooling rates introduce significant transient nucleation effects on phase nucleation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 398: Symposium C – Thermodynamics and Kinetics of Phase Transformations , 1995 , 45
Copyright
Copyright © Materials Research Society 1998

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1 Saunders, N. and Miodownik, A. P., Mater. Sci. Techn., 4 (1988), 768.Google Scholar
2 Fecht, H. J., Perepezko, J. H., Lee, M. C. and Johson, W. L., J. Appl. Phys, 68 (1990), 4494.Google Scholar
3 Saunders, N. and Tsakiropoulos, P., Mater. Sci. Techn., 4(1988), 157.Google Scholar
4 Frenkel, Y. I., in Kinetic Theoiy of Liquids, Dover, New York (1955).Google Scholar
5 Kashchiev, D., Surface Science, 14(1969), 209.Google Scholar
6 Kelton, K. F., Greer, A. L. and Thompson, C. V., J. Chem. Phys., 79(1983), 6261.Google Scholar
7 Toshchev, S. and Milchev, A., Comm. Dept. Chem. Bulg. Acad. Sci. 3(1970), 755.Google Scholar
8 Feder, J., Russell, K. C., Lothe, J. and Pound, G. M., Advan. Phys., 15(1966), 111.Google Scholar
9 Shao, G. and Tsakiropoulos, P., Acta Metall. Mater., 42(1994), 2937.Google Scholar
10 Shao, G., Tsakiropoulos, P. and Miodownik, A. P., Scripta Metall. Mater., 33(1995), 13.Google Scholar
11 G. Shao, , PhD Thesis (1995), University of Surrey.Google Scholar
12 Shao, G., Tsakiropoulos, P. and Miodownik, A. P., Mater. Res. Symp. Proc. 364(1994), ed. J. Horton et al, 187.Google Scholar