Journal
ACTA MATERIALIA
Volume 210, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2021.116812
Keywords
In situ irradiation; Nanoscale precipitates; Precipitate stability; Molecular dynamics simulations; Self-interstitial atoms (SIAs)
Funding
- Office of Fusion Energy Sciences, U.S. Department of Energy [DE-SC0006661]
- University of Tennessee
- UTK Center for Materials Processing graduate research fellowship
- U.S. Department of Energy, Office of Nuclear Energy under DOE Idaho Operations Office as part of a Nuclear Science User Facilities experiment [DE-AC07-051D14517]
- ANL graduate research internship program - DOE Office of Nuclear Energy [DE-AC02-06CH11357]
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The effects of initial precipitate sink strength, damage dose, and irradiation temperature on radiation-induced coherency loss of precipitates were studied in dilute Cu alloys through in situ irradiation with 1 MeV Kr ions at temperatures ranging from 50 to 613 K.
In situ irradiations with 1 MeV Kr ions at 50 similar to 613 K up to a fluence of 6.25 x 10(14) ions/cm(2) (similar to 1.25 displacements per atom, dpa) have been performed on pre-aged dilute Cu-0.9%Co, Cu-0.9%Fe and Cu-0.8%Cr alloys containing uniform matrix dispersions of coherent precipitates in order to study the effects of initial precipitate sink strength, damage dose and irradiation temperature on radiation-induced coherency loss of precipitates. Coherent precipitates with different point defect sink strengths (2 pi Nd, where N and d are the precipitate density and diameter) were used in this work to examine potential differences in atomic relaxation during absorption of point defects. In all cases, irradiation to low doses (
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