Al partitioning during phase separation in Fe-20%Cr-6%Al ODS alloy

Journal Article · Sun Jun 01 00:00:00 EDT 2008 · Journal of Materials Science

DOI:https://doi.org/10.1007/s10853-007-2228-z· OSTI ID:936039

Capdevila, C. ^[1]; Miller, Michael K ^[2]; Russell, Kaye F ^[2]

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1. CENIM-CSIC, Madrid, Spain
2. ORNL

Phase separation in a commercial Fe-20 wt.%Cr-6%Al oxide dispersion-strengthened PM 2000 steel has been characterized with a local-electrode atom probe after isothermal aging at 708 K and 748 K for times up to 3,600 h. A progressing decrease in the Al content of the Cr-rich {alpha}{prime} phase was observed with time at both aging temperatures. The Al partitioning trend was consistent with theoretical calculations. However, the experimentally observed Al partitioning factor was significantly lower than the predicted equilibrium value. A {approx}10 nm diameter, roughly spherical, Al- and Ti-enriched {beta}{prime} Fe(AlTi) phase was also observed.

• Research Organization: Oak Ridge National Laboratory (ORNL); Shared Research Equipment Collaborative Research Center
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 936039
• Journal Information: Journal of Materials Science, Journal Name: Journal of Materials Science Journal Issue: 11 Vol. 43; ISSN JMTSAS; ISSN 0022-2461
• Country of Publication: United States
• Language: English