Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-11-25T15:32:45.679Z Has data issue: false hasContentIssue false

Modelling of Phase Transformation During Homogenization of Ternary Aluminum Alloys

Published online by Cambridge University Press:  21 March 2011

Thorsten Hofmeister
Affiliation:
Foundry Institute, RWTH-Aachen, Germany
Klaus Greven
Affiliation:
Foundry Institute, RWTH-Aachen, Germany
Andreas Ludwig
Affiliation:
Foundry Institute, RWTH-Aachen, Germany
Peter R. Sahm
Affiliation:
Foundry Institute, RWTH-Aachen, Germany
Get access

Abstract

The microstructure determines for the most part mechanical properties of castings. This is the case especially with age-hardening aluminum alloys. To predict the phase transformation in cast parts during and after solidification a sophisticated approach to a coupled modeling of various simulation phenomena is presented. This approach couples a diffusion equation solver which considers the online estimation of thermodynamic equilibria with a macroscopic model for temperature calculation. The coupled micro-model predicts the dendrite solidification of ternary alloys. To simulate the phase transformation in temperature zones below solidification a homogenization model is added. Permanent mould casting experiments with ternary aluminum alloys are used to validate these models.

Type
Research Article
Copyright
Copyright © Materials Research Society 2001

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. Rappaz, M., Int. Mater. Rev. 34 (1989), 93123 Google Scholar
2. Kraft, T., Exner, H.E., Z. Metallkd. 87 No. 8 (1996), 598611 and 652-660Google Scholar
3. Boettinger, W.J. et al. , in Proc. of Int. Conf. Modeling of Casting, Welding and Advanced Solidification Processes VII, ed. Cross, M., Campbell, J. (1995), 649656 Google Scholar
4. Exner, H.E., Rettenmayr, M., Roosz, A., Mat. Sci. Forum 77 (1991), 205210 Google Scholar
5. Hansen, P.N., Sahm, P.R., in Proc. of. Int. Conf. Modeling of Casting and Welding Processes IV, ed. Giamei, A.F., Abbaschian, G.J. (1988), 529542 Google Scholar
6. Fackeldey, M. et al. , in Proc. of 4th Decennial Int. Conf. On Solidification Processing, Sheffield (1997), 4144 Google Scholar
7. Fackeldey, M., Ludwig, A., Sahm, P.R., Comp. Mater. Sci. 7 (1/2) (1996), 194199 Google Scholar
8. Eriksson, G., Spencer, P.J., Sippola, H., in Proceedings 2nd Colloquium on Process Simulation, Helsinki University of Technology, Report TKK-V-B104 (1995) 113 Google Scholar
9. , Roósz, Halder, E., Exner, H.E., Mater. Sci. Tech. 2 (1986), 11491155 Google Scholar
10. Voller, V.R., Sundarraj, S. in Proc. of Int. Conf. Modeling of Casting, Welding and Advanced Solidification Processes VI, ed. Piwonka, T.S., Voller, V., Katgerman, L. (1993), 251258 Google Scholar
11. Sasikumar, R., Exner, H.E, Modeling Simul. Mater. Sci. Eng 1 (1992), 1927 Google Scholar