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

doi:10.1016/j.scriptamat.2019.06.034

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

Nuclear Materials Performance

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

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 language	English
Pages (from-to)	33-37
Number of pages	5
Journal	Scripta Materialia
Volume	172
DOIs	https://doi.org/10.1016/j.scriptamat.2019.06.034
State	Published - Nov 2019

Keywords

FeCr alloys
Fission
Fusion
Nuclear
Precipitation

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10.1016/j.scriptamat.2019.06.034

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

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.",

keywords = "FeCr alloys, Fission, Fusion, Nuclear, Precipitation",

author = "Harrison, \{R. W.\} and Carruthers, \{A. W.\} and Hinks, \{J. A.\} and Burke, \{M. G.\} and Donnelly, \{S. E.\}",

note = "Publisher Copyright: {\textcopyright} 2019 Acta Materialia Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)",

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month = nov,

doi = "10.1016/j.scriptamat.2019.06.034",

language = "English",

volume = "172",

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journal = "Scripta Materialia",

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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 - 2019/11

Y1 - 2019/11

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 - Fission

KW - Fusion

KW - Nuclear

KW - Precipitation

UR - https://www.scopus.com/pages/publications/85068598249

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DO - 10.1016/j.scriptamat.2019.06.034

M3 - Article

AN - SCOPUS:85068598249

SN - 1359-6462

VL - 172

SP - 33

EP - 37

JO - Scripta Materialia

JF - Scripta Materialia

ER -

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

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Keywords

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