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J. Phys. IV France
Volume 07, Numéro C5, November 1997
IVth European Symposium on Martensitic Transformations
Page(s) C5-405 - C5-410
IVth European Symposium on Martensitic Transformations

J. Phys. IV France 07 (1997) C5-405-C5-410

DOI: 10.1051/jp4:1997564

The fcc/hcp Relative Phase Stability in the Fe-Mn-Co System : Martensitic Transformation Temperatures, Assessment of Gibbs Energies and Thermodynamic Calculation of T0 Lines

A. Baruj1, A. Fernandez Guillermet2 and M. Sade1

1  Centro Atomico Bariloche, CNEA, 8400 Bariloche, Argentina
2  CONICET, Argentina

In this paper the results of a systematic study of the fcc/hcp relative phase stability in the Fe-Mn-Co system are presented, which is based on new, extensive measurements of the martensitic transformation temperatures. The whole range of compositions where the transformation occurs has now been covered. A thermodynamic analysis of the experimental information based on Gibbs energy modelling of the Fe-Mn-Co, Fe-Mn and Fe-Co systems is performed. The T0 temperatures of the Fe-Mn-Co system are established. It is shown how ternary information can be utilized to assess the Gibbs energy function of the hcp phase, which is not stable in the Fe-rich region of the binary Fe-Co system.

© EDP Sciences 1997