Influence of pre-implanted helium on dislocation loop type in tungsten under self-ion irradiation

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21 Citations (Scopus)

Abstract

Transmission electron microscopy with in-situ ion irradiation has been used to examine dislocation loop formation during self-ion irradiation of pristine W and samples pre-implanted with He. Dislocation loops with b = ±½<111> and b = <100> were observed in both the pristine W and samples pre-implanted with He. This contrasts previous works with He/H ion irradiation where no b = <100> type loops have been observed in W. The b = <100> dislocation loops form during the cascade and He has no effect on the type of dislocation loop formed, unlike b = <100> type loop nucleation in FeCr alloys.
LanguageEnglish
Pages61-65
Number of pages5
JournalScripta Materialia
Volume150
Early online date20 Mar 2018
DOIs
Publication statusPublished - Jun 2018

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Helium
Tungsten
Ion bombardment
ion irradiation
tungsten
helium
Nucleation
Transmission electron microscopy
cascades
nucleation
transmission electron microscopy

Cite this

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abstract = "Transmission electron microscopy with in-situ ion irradiation has been used to examine dislocation loop formation during self-ion irradiation of pristine W and samples pre-implanted with He. Dislocation loops with b = ±½<111> and b = <100> were observed in both the pristine W and samples pre-implanted with He. This contrasts previous works with He/H ion irradiation where no b = <100> type loops have been observed in W. The b = <100> dislocation loops form during the cascade and He has no effect on the type of dislocation loop formed, unlike b = <100> type loop nucleation in FeCr alloys.",
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Influence of pre-implanted helium on dislocation loop type in tungsten under self-ion irradiation. / Harrison, Robert; Hinks, Jonathan; Donnelly, Stephen.

In: Scripta Materialia, Vol. 150, 06.2018, p. 61-65.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Influence of pre-implanted helium on dislocation loop type in tungsten under self-ion irradiation

AU - Harrison, Robert

AU - Hinks, Jonathan

AU - Donnelly, Stephen

PY - 2018/6

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AB - Transmission electron microscopy with in-situ ion irradiation has been used to examine dislocation loop formation during self-ion irradiation of pristine W and samples pre-implanted with He. Dislocation loops with b = ±½<111> and b = <100> were observed in both the pristine W and samples pre-implanted with He. This contrasts previous works with He/H ion irradiation where no b = <100> type loops have been observed in W. The b = <100> dislocation loops form during the cascade and He has no effect on the type of dislocation loop formed, unlike b = <100> type loop nucleation in FeCr alloys.

KW - Dislocation

KW - In situ TEM

KW - Tungsten

KW - Irradiation

KW - Fusion

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