Atom probe tomography analysis of high dose MA957 at selected irradiation temperatures

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Abstract

The oxide dispersion strengthened alloy MA957, irradiated up to 113 dpa in the Fast Flux Test Facility-Materials Open Test Assembly, was investigated by 3D-atom probe tomography. Oxide particles appear to be stable under irradiation at elevated temperatures. Although, the nominal chemistry of the particles does not change, evidence suggests occurence of ballistic dissolution and reformation processes. At 412 °C and 109 dpa also the chromium rich α' phase appears between oxide particles suggesting radiation induced segregation.

Details

Original languageEnglish
Pages (from-to)225-234
JournalJournal of Nuclear Materials
Volume459
Issue number04
DOIs
Publication statusPublished - Apr 2015

Keywords

  • MA957, APT, FFTF-MOTA, FIB, ODS

ID: 179062