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

Published online by Cambridge University Press:  02 February 2017

Shahbaz Ahmed Azmi ,
Alena Michalcová ,
Lucia Senčekova  and
Martin Palm
Shahbaz Ahmed Azmi
Affiliation:
Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, D-40237 Düsseldorf, Germany
Alena Michalcová
Affiliation:
Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, D-40237 Düsseldorf, Germany
Lucia Senčekova
Affiliation:
Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, D-40237 Düsseldorf, Germany
Martin Palm*
Affiliation:
Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, D-40237 Düsseldorf, Germany
*
*(Email: palm@mpie.de)
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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.

Keywords

FeAlNb
Type
Articles
Information
MRS Advances , Volume 2 , Issue 25: Mechanical Behavior and Failure Mechanisms of Materials , 2017 , pp. 1353 - 1359
Copyright
Copyright © Materials Research Society 2017 

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References

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