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Experimental Investigation and Thermodynamic Calculation of the Central Part of the Mg – Al Phase Diagram

Ping Liang, Huang-Lung Su, Patricia Donnadieu, Mireile G. Harmelin, Annick Quivy, Patrik Ochin, Günter Effenberg, Hans J. Seifert, Hans L. Lukas and Fritz Aldinger

Abstract

The central part of the Mg–Al phase diagram was experimentally re-investigated. Between the γ and β phases only one additional intermediate phase could be verified. The other phases reported in literature may be explained by a commensurate modulation of the γ phase (γ') found recently by electron diffraction. The solubility limit of γ' near the melting temperature was investigated by wavelength dispersive X-ray spectroscopy. Thermodynamic descriptions for these phases are proposed.


P. Liang, H.-L. Su, H. J. Seifert, H. L. Lukas, F. Aldinger Max-Planck-Institut für Metallforschung Heisenbergstr. 5 D-70569, Stuttgart, Germany
P. Donnadieu Laboratoire d’Etude des Microstructures CNRS/ONERA, BP 72, F-92322 Chatillon Cedex, France and LTPCM- ENSEEG/INPG, Domaine Universitaire, BP 75, F-38402 Saint Martin d’Hères, France
M. G. Harmelin, A. Quiry, P. Ochin Centre d’Etudes de Chimie Métallurgique, CNRS, 15 rue Georges Urbain, F-94407 Vitry-sur-Seine Cedex, France
G. Effenberg MSI (Materials Science International Services GmbH), Nobelstr. 15, D-70569 Stuttgart, Germany

  1. Financial support by the German “Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie” (Contract 03K7208 0), project COST 507 as well as the European Commission (Human Capital and Mobility, Contract ERBCHRX-CT93-0285, MSIT Trainer Network) is gratefully acknowledged.

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Received: 1998-03-30
Published Online: 2021-12-30

© 1998 Carl Hanser Verlag, München