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Microstructure and Phase Transformation Temperatures of Two-Phase FeAl (B2) + FeAl2 Alloys

Published online by Cambridge University Press:  02 January 2015

Xiaolin Li ,
Martin Palm ,
Anke Scherf ,
Daniel Janda ,
Martin Heilmaier  and
Frank Stein
Xiaolin Li
Affiliation:
Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany
Martin Palm
Affiliation:
Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany
Anke Scherf
Affiliation:
Karlsruhe Institute of Technology, Karlsruhe, Germany
Daniel Janda
Affiliation:
Karlsruhe Institute of Technology, Karlsruhe, Germany
Martin Heilmaier
Affiliation:
Karlsruhe Institute of Technology, Karlsruhe, Germany
Frank Stein
Affiliation:
Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany
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Abstract

Fe-Al alloys with about 55 to 65 at.% Al undergo a eutectoid transformation at 1095 °C: Fe5Al8 (ε) ↔ FeAl + FeAl2. Hence, as-cast Fe-Al alloys in this composition range show a very fine-scaled lamellar microstructure (average lamellar spacing below 500 nm) consisting of the two phases FeAl and FeAl2. The microstructure looks similar to the α2 + γ lamellar microstructure of Ti-Al-based alloys, which is known for having well-balanced properties in terms of creep, ductility and strength. However, there is limited knowledge about the properties of Fe-Al-based alloys in this composition range. In this study, a series of as-cast as well as heat-treated Fe-Al alloys with compositions between 57 and 63 at.% Al were investigated. The microstructures and crystal structures were analysed by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. The composition dependence of all transition temperatures was obtained by differential thermal analysis (DTA).

Keywords

microstructureAlalloy
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1760: Symposium YY – Advanced Structural and Functional Intermetallic-Based Alloys , 2015 , mrsf14-1760-yy04-09
Copyright
Copyright © Materials Research Society 2014 

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References

REFERENCES

Morris, D.G., Morris-Munoz, M.A., Adv. Eng. Mater. 13, 43–47 (2011).CrossRefGoogle Scholar
Palm, M., Int. J. Mater. Res. 100, 277–287 (2009).CrossRefGoogle Scholar
Stoloff, N.S., Mater. Sci. Eng. A 258, 1–14 (1998).CrossRefGoogle Scholar
Baker, I. and Munroe, P. R., Int. Mater. Rev., 42, 181–205 (1997).CrossRefGoogle Scholar
Stein, F. and Palm, M., Int. J. Mater. Res. 98, 580–588 (2007).CrossRefGoogle Scholar
Stein, F., Vogel, S.C., Eumann, M. and Palm, M., Intermetallics 18, 150–156 (2010).CrossRefGoogle Scholar
Chumak, I., Richter, K.W. and Ehrenberg, H., Acta Cryst. C 66, i87–i88 (2010).CrossRefGoogle Scholar