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Behavior of Fe-ODS Alloys After Thermal Aging Treatments

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Metallurgical and Materials Transactions E

Abstract

Oxide dispersion alloys are one of the candidates as cladding materials for Gen IV fast reactors, due to their high strength at high temperature, good creep properties, and swelling resistance. This good performance is mainly due to a fine dispersion of nano-oxide particles on the microstructure and to non-grained structure. The microstructural stability and the mechanical properties of a Fe-ODS alloy are studied after different thermal aging experiments at 973 K (700 °C), 5000 hours; 973 K (700 °C), 10,000 hours; and 1123 K (850 °C), 10,000 hours. SEM/EBSD and TEM together with tensile and impact tests on the as-received and thermally aged material have been carried out. In general, for all the tested conditions, a slight softening effect is observed attributed to the changes in the grain structure as well as to the changes in the amount and size of nano-oxide particles. In addition, the aged material shows a lower impact USE value while the DBTT is maintained.

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Acknowledgments

Part of this work is supported by the European Commission under the FP7 GETMAT project, Grant Agreement FP7-212175 and FP7 MatISSE project, Grant Agreement n.604862, and in the framework of the EERA (European Energy Research Alliance) Joint Program on Nuclear Materials.

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Authors and Affiliations

  1. Materials of Energy Interest Division, Technology Department, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Av Complutense, 40, 28040, Madrid, Spain

    Marta Serrano Garcia (Head of Materials of Energy Interest Division), Mercedes Hernández-Mayoral (Senior Researcher in Materials of Energy Interest Division) & Elvira Oñorbe Esparraguera (Postdoctoral position in Materials of Energy Interest Division)

Authors
  1. Marta Serrano Garcia
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  2. Mercedes Hernández-Mayoral
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  3. Elvira Oñorbe Esparraguera
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Corresponding author

Correspondence to Marta Serrano Garcia.

Additional information

Manuscript submitted July 29, 2015.

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Serrano Garcia, M., Hernández-Mayoral, M. & Esparraguera, E.O. Behavior of Fe-ODS Alloys After Thermal Aging Treatments. Metallurgical and Materials Transactions E 3, 55–63 (2016). https://doi.org/10.1007/s40553-016-0069-x

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  • DOI: https://doi.org/10.1007/s40553-016-0069-x

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