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Microstructure and mechanical properties of Fe-Al-Nb-B alloys

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Abstract

Doping of Fe–Al–Nb alloys with boron results in precipitation of stable C14 Laves phase Nb(Fe,Al)2 instead of metastable Heusler phase Fe2AlNb as in case of the ternary system. The boron stimulated precipitation of the Laves phase leads to preferential precipitation of the Laves phase along grain boundaries and – with higher supersaturation of Nb in the Fe-Al matrix – to an even distribution of additional precipitates within the grains. Though these microstructures seem to be more favourable than in the boron-free alloys, which show an uneven distribution of rather large Laves phase precipitates, no marked strengthening effect by the Laves phase in the Fe–Al–Nb–B alloys is observed.

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Authors and Affiliations

  1. Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, D-40237, Düsseldorf, Germany

    Shahbaz Ahmed Azmi, Alena Michalcová, Lucia Senčekova & Martin Palm

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  1. Shahbaz Ahmed Azmi
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  2. Alena Michalcová
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  3. Lucia Senčekova
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  4. Martin Palm
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Azmi, S.A., Michalcová, A., Senčekova, L. et al. Microstructure and mechanical properties of Fe-Al-Nb-B alloys. MRS Advances 2, 1353–1359 (2017). https://doi.org/10.1557/adv.2017.138

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  • DOI: https://doi.org/10.1557/adv.2017.138

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