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The Effect of Laves Phase (Fe,Al)2Zr on the High-Temperature Strength of Carbon-Alloyed Fe3Al Aluminide

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Abstract

The effects of carbon on the phase structure and on the yield stress σ 0.2 in the temperature range from 873 K to 1073 K (600 °C to 800 °C) of the Fe3Al type aluminides alloyed by Zr are analyzed. Four alloys with Zr and C in ranging from 1.0 to 5.0 at. pct of additives were used. The appearing of either Laves phase (Fe,Al)2Zr and/or carbides depend on the difference in concentrations, c Zr − c C. This parameter (c Zr − c C) has been selected instead of the concentration ratio c Zr/c C used in previous works since it exhibits a significantly better correlation with the Laves phase concentration which influences the high-temperature yield stress, σ 0.2, of the tested alloys. The presence of Laves phase or eutectic (matrix—Laves phase), respectively, enhances the value of the yield stress σ 0.2. The amount of Laves phase is decreased by the presence of C due to the affinity of carbon to Zr.

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Acknowledgment

The paper is based on the work supported by the Grant Agency of the Czech Republic within the Project 108/12/1452.

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Authors and Affiliations

  1. Department of Physics of Materials, Charles University, MFF, Ke Karlovu 5, 121 16, Prague, Czech Republic

    Petr Kratochvíl (Professor) & Robert Král (Professor)

  2. Department of Materials Science, Faculty of Engineering, Technical University of Liberec, Studentská 2, 46117, Liberec, Czech Republic

    Věra Vodičková (Associate Professor) & Martin Švec (Associate Professor)

Authors
  1. Petr Kratochvíl
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  2. Věra Vodičková
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  3. Robert Král
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  4. Martin Švec
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Correspondence to Petr Kratochvíl.

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Manuscript submitted September 10, 2015.

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Kratochvíl, P., Vodičková, V., Král, R. et al. The Effect of Laves Phase (Fe,Al)2Zr on the High-Temperature Strength of Carbon-Alloyed Fe3Al Aluminide. Metall Mater Trans A 47, 1128–1131 (2016). https://doi.org/10.1007/s11661-015-3309-2

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  • DOI: https://doi.org/10.1007/s11661-015-3309-2

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