Microstructural stability of Fe–Cr–Al alloys at 450–550 °C
2015 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 457, 291-297 p.Article in journal (Refereed) Published
Iron–Chromium–Aluminium (Fe–Cr–Al) alloys have been widely investigated as candidate materials for various nuclear applications. Albeit the excellent corrosion resistance, conventional Fe–Cr–Al alloys suffer from α–α′ phase separation and embrittlement when subjected to temperatures up to 500 °C, due to their high Cr-content. Low-Cr Fe–Cr–Al alloys are anticipated to be embrittlement resistant and provide adequate oxidation properties, yet long-term aging experiments and simulations are lacking in literature. In this study, Fe–10Cr–(4–8)Al alloys and a Fe–21Cr–5Al were thermally aged in the temperature interval of 450–550 °C for times up to 10,000 h, and the microstructures were evaluated mainly using atom probe tomography. In addition, a Kinetic Monte Carlo (KMC) model of the Fe–Cr–Al system was developed. No phase separation was observed in the Fe–10Cr–(4–8)Al alloys, and the developed KMC model yielded results in good agreement with the experimental data.
Place, publisher, year, edition, pages
2015. Vol. 457, 291-297 p.
Aluminum, Chromium, Corrosion resistance, Embrittlement, Iron alloys, Phase separation, Atom probe tomography, Candidate materials, Excellent corrosion resistances, Kinetic Monte Carlo modeling, Microstructural stability, Nuclear application, Oxidation properties, Temperature intervals
Corrosion Engineering Other Materials Engineering
IdentifiersURN: urn:nbn:se:kth:diva-157834DOI: 10.1016/j.jnucmat.2014.11.101ISI: 000349169100039ScopusID: 2-s2.0-84918521359OAI: oai:DiVA.org:kth-157834DiVA: diva2:772456
FunderSwedish Research Council
QC 201412172014-12-172014-12-172015-03-09Bibliographically approved