Characterization of the Fe-rich corner of Al-Fe-Si-Ti

Martin C J Marker; Liliana I Duarte; Christian Leinenbach; Klaus W Richter

doi:10.1016/j.intermet.2013.03.007

Characterization of the Fe-rich corner of Al-Fe-Si-Ti

Intermetallics (Barking). 2013 Aug:39:38-49. doi: 10.1016/j.intermet.2013.03.007.

Authors

Martin C J Marker¹, Liliana I Duarte², Christian Leinenbach², Klaus W Richter¹

Affiliations

¹ Department of Inorganic Chemistry/Materials Chemistry, University of Vienna, Währingerstraße Str. 42, A-1090 Vienna, Austria.
² EMPA, Swiss Federal Laboratories for Materials Science & Technology, Laboratory for Joining and Interface Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland.

Abstract

The quaternary system Al-Fe-Si-Ti was studied in the iron-rich corner for sections at 50, 60 and 70 at.% Fe at 900 °C. Isothermal phase equilibria were investigated by a combination of optical microscopy, X-ray powder diffraction (XRD) followed by Rietveld refinement and Electron Probe Microanalysis (EPMA). Phase boundaries of the phases, in particular of the Laves phase (Fe₂Ti) and of the extended phase field of A2/B2/D0₃, were investigated. Selected samples containing the Laves phase and the B2 phase were characterized by microhardness measurements at different compositions throughout the quaternary homogeneity range of the phases.

Keywords: A. Iron aluminides; A. Laves phases; A. Multiphase intermetallics; B. Mechanical properties at ambient temperature; B. Phase diagrams.