Cascade size and dose rate effects on α′ precipitation in ion-irradiated Fe14Cr alloy

R.w. Harrison, A.w. Carruthers, J.a. Hinks, M.g. Burke, S.e. Donnelly

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Dose rate and cascade size effects on α′ 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 °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 α′ precipitation under He ion irradiation, resulting in similar precipitate sizes and density. Number densities of α′ precipitates decreased with increasing ion mass and energy attributed to ballistic mixing from high-energy-density cascade formation and sub-cascade overlap.
Original languageEnglish
Pages (from-to)33-37
Number of pages5
JournalScripta Materialia
Volume172
Early online date11 Jul 2019
DOIs
Publication statusPublished - 1 Nov 2019

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