Radiation Damage Mitigation in FeCrAl Alloy at Sub-Recrystallization Temperatures

Md Hafijur Rahman, Md Abu Jafar Rasel, Christopher M. Smyth, Daudi Waryoba, Aman Haque

Research output: Contribution to journalArticlepeer-review

Abstract

Traditional defect recovery methods rely on high-temperature annealing, often exceeding 750 °C for FeCrAl. In this study, we introduce electron wind force (EWF)-assisted annealing as an alternative approach to mitigate irradiation-induced defects at significantly lower temperatures. FeCrAl samples irradiated with 5 MeV Zr2+ ions at a dose of 1014 cm−2 were annealed using EWF at 250 °C for 60 s. We demonstrate a remarkable transformation in the irradiated microstructure, where significant increases in kernel average misorientation (KAM) and low-angle grain boundaries (LAGBs) typically indicate heightened defect density; the use of EWF annealing reversed these effects. X-ray diffraction (XRD) confirmed these findings, showing substantial reductions in full width at half maximum (FWHM) values and a realignment of peak positions toward their original states, indicative of stress and defect recovery. To compare the effectiveness of EWF, we also conducted traditional thermal annealing at 250 °C for 7 h, which proved less effective in defect recovery as evidenced by less pronounced improvements in XRD FWHM values.

Original languageEnglish (US)
Article number124
JournalMaterials
Volume18
Issue number1
DOIs
StatePublished - Jan 2025

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics

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