Journal
SCRIPTA MATERIALIA
Volume 172, Issue -, Pages 33-37Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2019.06.034
Keywords
FeCr alloys; Nuclear; Fission; Fusion; Precipitation
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Funding
- EPSRC [EP/P003591/1, EP/M011135/1, EP/M028283/1]
- EPSRC [EP/M011135/1, EP/M028283/1, EP/P003591/1] Funding Source: UKRI
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Dose rate and cascade size effects on alpha' formation in Fe14Cr have been studied under ion irradiation using analytical scanning transmission electron microscopy. Samples were irradiated with 100 keV He, 350 keV Ne or 1 MeV Kr ions at 300 degrees C to a dose of 2.5 DPA at dose rates of 10(-4) and 10(-3) displacements per atom (DPA)/s. Higher dose rates commensurately accelerate alpha' precipitation under He ion irradiation, resulting in similar precipitate sizes and density. Number densities of alpha' precipitates decreased with increasing ion mass and energy attributed to ballistic mixing from high-energy-density cascade formation and sub-cascade overlap.
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