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Modelling of Precipitation Kinetics with Simultanous Stress Relaxation

Published online by Cambridge University Press:  26 February 2011

Franz Dieter Fischer
Affiliation:
mechanik@unileoben.ac.at, Montanuniversität Leoben, Institute of Mechanics, Franz-Josef-Strasse 18, Leoben, A-8700, Austria, ++43 3842 402 4000, ++43 3842 46048
Jiri Svoboda
Affiliation:
svobj@ipm.cz, Academy of Sciences of the Czech Republic, Institute of Physics of Materials, Zizkova 22, Brno, CZ-616 62, Czech Republic
Ernst Gamsjäger
Affiliation:
e.gamsjaeger@unileoben.ac.at, Montanuniversität Leoben, Institute of Mechanics, Franz-Josef-Strasse 18, Leoben, A-8700, Austria
Ernst Kozeschnik
Affiliation:
ernst.kozeschnik@tugraz.at, University of Technology, Institute for Materials Science, Welding and Forming, Kopernikusgase 24, Graz, A-8010, Austria
Bernhard Sonderegger
Affiliation:
bernhard.sonderegger@tugraz.at, University of Technology, Institute for Materials Science, Welding and Forming, Kopernikusgase 24, Graz, A-8010, Austria
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Abstract

Misfit strain connected with the formation of large internal stresses may drastically influence the precipitation kinetics. A new model for the simultaneous precipitate growth and misfit stress relaxation in binary systems has been developed based on the idea that the internal stresses are relaxed by generation or annihilation of vacancies at the matrix/precipitate interface. The model is applied to the Fe-C system by considering the growth of the cementite precipitate in the ferritic matrix. The influence of the stress relaxation on the precipitate growth kinetics is demonstrated.

Type
Research Article
Copyright
Copyright © Materials Research Society 2007

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References

1. Zhang, LH, Johnson, E, Dahmen, U, in Mat. Res. Symp. Proc. edited by Anderson, P.M., et al., MRS, Warrendale, PA, Vol. 821, P.8.7.1.-P.8.7.7, 2004 Google Scholar
2. Dahmen, U, Hagége, S., Faudot, F, Radetic, T, Johnson, E, Phil. Mag.,2004;84,2651 CrossRefGoogle Scholar
3. Zhang, LH, Johnson, E, Dahmen, U, Acta mater., 2005;53,3635 CrossRefGoogle Scholar
4. Svoboda, J, Gamsjäger, E, Fischer, FD, Phil. Mag. Letters, 2005;85,473 CrossRefGoogle Scholar
5. Svoboda, J, Gamsjäger, E, Fischer, FD, Acta mater., 2006;54;4575 CrossRefGoogle Scholar
6. Svoboda, J, Turek, I, Fischer, FD, Phil. Mag., 2005;85,3699 CrossRefGoogle Scholar
7. Fischer, FD, Böhm, HJ, Oberaigner, ER, Waitz, T, Acta mater., 2006;54,151 CrossRefGoogle Scholar

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