Influence of nanovoids on α-α' phase separation in FeCrAl oxide dispersion strengthened alloy

Journal Article · Mon Aug 10 00:00:00 EDT 2015 · Scripta Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2015.07.044· OSTI ID:1265951

Capdevila, Carlos ^[1]; Aranda, M. M. ^[1]; Rememnteria, R. ^[1]; Dominquez-Reyes, R. ^[2]; Uriones-Garrote, E. ^[3]; Miller, Michael K. ^[4]

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1. Centro Nacional de Investigaciones Metalurgicas (CENIM-CSIC), Madrid (Spain)
2. Univ. Carlos III de Madrid, Leganes (Spain)
3. Univ. Complutense de Madrid, Madrid (Spain)
4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

The presence of nanovoids in the vicinity of oxide particles in FeCrAl oxide dispersion strengthened (ODS) alloy has been identified. These nanovoids are inherent to the manufacturing route and remain quite resistant during heat treatments. Positron annihilation spectroscopy (PAS) experiments demonstrate that these nanovoids trap Cr inside thereby reducing the Cr-content in the matrix. In conclusion, this might lead to a delay in the α–α' phase separation process as observed by atom probe tomography (APT).

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1265951
• Journal Information: Scripta Materialia, Vol. 110; ISSN 1359-6462
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE