Journal of Materials Science

, Volume 52, Issue 3, pp 1446–1460 | Cite as

Analysis of phase diagram and diffusion coefficient for modeling of microsegregation

  • M. H. Avazkonandeh-Gharavol
  • M. Haddad-Sabzevar
  • H. Fredriksson
Original Paper
First Online:
Received:
Accepted:
  • 207 Downloads

Abstract

Thermodynamic description of phase diagram and diffusion data are required to model microsegregation during solidification of metallic alloys. Knowledge about non-equilibrium phase diagrams is essential for modeling of microsegregation in practical situations. Therefore, the aim of this study is to theoretically analyze phase diagram and diffusion data for calculation of microsegregation. For this purpose, aluminum-rich part of the Al–Cu phase diagram was recalculated under non-equilibrium conditions. Effect of excess vacancies formed during solidification was considered on both the phase diagram and diffusion coefficient. The results show that by modifying the phase diagram, the calculated results have better consistency with the experimental results, but there is still room for improvement. When the effect of excess vacancies on diffusion coefficient is considered, the modeling results show a much better correlation with the experimental results. The origin of discrepancies between the calculations and experiments are deeply discussed using current theories in solidification.

Keywords

Diffusion Coefficient Cool Rate Differential Thermal Analysis Node Number High Cool Rate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Notes

Acknowledgements

The technical support of the Royal Institute of Technology for performing the experiments is appreciated. M. H. Avazkonandeh-Gharavol appreciates the financial support by Ministry of Sciences, Research and Technology of Islamic Republic of Iran during his visit to the Royal Institute of Technology. Haji Muhhamad Muhmond and Saud Salim are also gratefully acknowledged for their help to set up the experiments.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • M. H. Avazkonandeh-Gharavol
    • 1
  • M. Haddad-Sabzevar
    • 2
  • H. Fredriksson
    • 3
  1. 1.Department of Materials and Polymer Engineering, Faculty of EngineeringHakim Sabzevari UniversitySabzevarIran
  2. 2.Department of Metallurgical and Materials Engineering, Faculty of EngineeringFerdowsi University of MashhadMashhadIran
  3. 3.Department of Materials Science and EngineeringRoyal Institute of TechnologyStockholmSweden

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