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.
LanguageEnglish
Pages33-37
Number of pages5
JournalScripta Materialia
Volume172
Early online date11 Jul 2019
DOIs
Publication statusE-pub ahead of print - 11 Jul 2019

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Ion bombardment
Precipitates
cascades
Ions
dosage
Atoms
Ballistics
ion irradiation
precipitates
ions
Transmission electron microscopy
Scanning electron microscopy
ballistics
atoms
flux density
transmission electron microscopy
scanning electron microscopy
energy

Cite this

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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.",
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Cascade size and dose rate effects on α′ precipitation in ion-irradiated Fe14Cr alloy. / Harrison, R.w.; Carruthers, A.w.; Hinks, J.a.; Burke, M.g.; Donnelly, S.e.

In: Scripta Materialia, Vol. 172, 01.11.2019, p. 33-37.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Cascade size and dose rate effects on α′ precipitation in ion-irradiated Fe14Cr alloy

AU - Harrison, R.w.

AU - Carruthers, A.w.

AU - Hinks, J.a.

AU - Burke, M.g.

AU - Donnelly, S.e.

PY - 2019/7/11

Y1 - 2019/7/11

N2 - 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.

AB - 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.

KW - FeCr alloys

KW - Nuclear

KW - Fission

KW - Fusion

KW - Precipitation

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JO - Scripta Materialia

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