Elsevier

Scripta Materialia

Volume 142, 1 January 2018, Pages 41-45
Scripta Materialia

Regular Article
Precipitation of α′ in neutron irradiated commercial FeCrAl alloys

https://doi.org/10.1016/j.scriptamat.2017.08.022Get rights and content

Abstract

Alkrothal 720 and Kanthal APMT™, two commercial FeCrAl alloys, were neutron irradiated up to damage doses of 7.0 displacements per atom (dpa) in the temperature range of 320 to 382 °C to characterize the α′ precipitation in these alloys using small-angle neutron scattering. Both alloys exhibited α′ precipitation. Kanthal APMT™ exhibited higher number densities and volume fraction, a result attributed to its higher Cr content compared with Alkrothal 720. Trends observed as a function of damage dose (dpa) are consistent with literature trends for both FeCr and FeCrAl alloys.

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Acknowledgments

The authors thank ORNL's Thermal Hydraulics and Irradiation Engineering Group, Irradiated Materials Examination and Testing facility, and Low Activation Materials Development and Analysis facility staff for their continuing support of this research. Additionally, the authors would like to thank R.H. Howard of ORNL for his thoughtful design and implementation of the irradiation capsules within HFIR.

Research was sponsored by the Department of Energy (DOE) Office of Nuclear Energy, Advanced Fuel

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    This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).

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