# The Al-Rich Part of the Fe-Al Phase Diagram

Li, Xiaolin; Scherf, Anke; Heilmaier, Martin; Stein, Frank

##### Abstract:
The Al-rich part of the Fe-Al phase diagram between 50 and 80 at.% Al including the complex intermetallic phases Fe$_{5}$Al$_{8}$ (ε), FeAl$_{2}$, Fe$_{2}$Al$_{5}$, and Fe4Al$_{13}$ was re-investigated in detail. A series of 19 alloys was produced and heat-treated at temperatures in the range from 600 to 1100 °C for up to 5000 h. The obtained data were further complemented by results from a number of diffusion couples, which helped to determine the homogeneity ranges of the phases FeAl$_{2}$, Fe$_{2}$Al$_{5}$, and Fe$_{4}$Al$_{13}$. All microstructures were inspected by scanning electron microscopy (SEM), and chemical compositions of the equilibrium phases as well as of the alloys were obtained by electron probe microanalysis (EPMA). Crystal structures and the variation of the lattice parameters were studied by x-ray diffraction (XRD) and differential thermal analysis (DTA) was applied to measure all types of transition temperatures. From these results, a revised version of the Al-rich part of the phase diagram was constructed.

 Zugehörige Institution(en) am KIT Fakultät für Maschinenbau (MACH)Institut für Angewandte Materialien - Werkstoffkunde (IAM-WK) Publikationstyp Zeitschriftenaufsatz Publikationsjahr 2016 Sprache Englisch Identifikator ISSN: 1547-7037, 1863-7345 KITopen-ID: 1000062712 Erschienen in Journal of phase equilibria and diffusion Verlag Springer Verlag Band 37 Heft 2 Seiten 162-173 Vorab online veröffentlicht am 19.01.2016 Nachgewiesen in DimensionsWeb of ScienceScopus
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