Irradiation-induced patterning in dilute Cu–Fe alloys

B. Stumphy, S. W. Chee, N. Q. Vo, R. S. Averback, P. Bellon, M. Ghafari

Research output: Contribution to journalArticle

Abstract

Compositional patterning in dilute Cu1−xFex (x ≈ 12%) induced by 1.8 MeV Kr+ irradiation was studied as a function of temperature using atom probe tomography. Irradiation near room temperature led to homogenization of the sample, whereas irradiation at 300 °C and above led to precipitation and macroscopic coarsening. Between these two temperatures the irradiated alloys formed steady state patterns of composition where precipitates grew to a fixed size. The size in this regime increased somewhat with temperature. It was also observed that the steady state concentrations of Fe in Cu matrix and Cu in the Fe precipitates both greatly exceeded their equilibrium solubilities, with the degree of supersaturation in each phase decreasing with increasing temperature. In the macroscopic coarsening regime, the Fe-rich precipitates showed indications of a “cherry-pit” structure, with Cu precipitates forming within the Fe precipitates. In the patterning regime, interfaces between Fe-rich precipitates and the Cu-rich matrix were irregular and diffuse.

Original languageEnglish (US)
Pages (from-to)66-74
Number of pages9
JournalJournal of Nuclear Materials
Volume453
Issue number1-3
DOIs
StatePublished - Oct 1 2014

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

Fingerprint Dive into the research topics of 'Irradiation-induced patterning in dilute Cu–Fe alloys'. Together they form a unique fingerprint.

  • Cite this