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Strengthening of Fe3Al Aluminides by One or Two Solute Elements

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Abstract

The compressive yield stress of Fe-26Al with additives Ti (0.5 to 4 at. pct), Cr (0.5 to 8 at. pct), Mo (0.5 to 4 at. pct), and V (0.5 to 8 at. pct) at 1073 K (800 °C) has been determined. The effect of the concentration of diverse solutes on the yield stress at 1073 K (800 °C) was compared, and the additivity of the effects of solutes was tested. The effects in iron aluminides with two solutes (V and Ti, Ti and Cr, V and Cr) are compared with those of a single solute V, Ti, and Cr. It is found that the additivity of yield stress increments is valid only for lower solute concentrations. When the amount of the solute atoms increases, the yield stress increment is substantially higher than the sum of the yield stress increments of single solutes. This behavior is related to the high-temperature order in iron aluminides.

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Acknowledgments

Most of the alloys used in this work were kindly prepared by Frank Stein and Johannes Deges of the MPI für Eisenforschung in Düsseldorf, Germany. This help is acknowledged. The research is a part of the Project 16-05608S of the Czech Research Foundation.

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Authors and Affiliations

  1. Department of Physics of Materials, Faculty of Mathematics and Physics, Charles University, Ke Karlovu5, 12116, Prague2, Czech Republic

    Petr Kratochvíl, Peter Minárik, Josef Pešička & Robert Král

  2. Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 12116, Prague 2, Czech Republic

    Stanislav Daniš

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  1. Petr Kratochvíl
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  2. Stanislav Daniš
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  3. Peter Minárik
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Correspondence to Petr Kratochvíl.

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Manuscript submitted June 3, 2017.

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Kratochvíl, P., Daniš, S., Minárik, P. et al. Strengthening of Fe3Al Aluminides by One or Two Solute Elements. Metall Mater Trans A 48, 4135–4139 (2017). https://doi.org/10.1007/s11661-017-4211-x

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  • DOI: https://doi.org/10.1007/s11661-017-4211-x

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