Radiation damage in tungsten from cascade overlap with voids and vacancy clusters

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dc.contributor.author Fellman, A.
dc.contributor.author Sand, A. E.
dc.contributor.author Byggmästar, Jesper
dc.contributor.author Nordlund, Kai
dc.date.accessioned 2019-08-16T08:10:03Z
dc.date.available 2019-08-16T08:10:03Z
dc.date.issued 2019-10-09
dc.identifier.citation Fellman , A , Sand , A E , Byggmästar , J & Nordlund , K 2019 , ' Radiation damage in tungsten from cascade overlap with voids and vacancy clusters ' , Journal of Physics. Condensed Matter , vol. 31 , no. 40 , 405402 . https://doi.org/10.1088/1361-648X/ab2ea4
dc.identifier.other PURE: 126158278
dc.identifier.other PURE UUID: 881d7a2c-d309-4e1e-bf1c-e5f5acf4e95a
dc.identifier.other ORCID: /0000-0001-6244-1942/work/60610279
dc.identifier.other ORCID: /0000-0001-9041-1468/work/60611665
dc.identifier.other ORCID: /0000-0002-4898-6150/work/60612883
dc.identifier.other WOS: 000475415600001
dc.identifier.uri http://hdl.handle.net/10138/304669
dc.description.abstract We have performed a systematic molecular dynamics investigation of the effects of overlap of collision cascades in tungsten with pre-existing vacancy-type defects. In particular, we focus on the implications for fusion neutron irradiated tungsten in relation to comparisons with damage production under ion irradiation conditions. We find that overlap of a cascade with a vacancy-type defect decreases the number of new defects with roughly the same functional dependence as previously shown for interstitial clusters. We further find that different mechanisms govern the formation of dislocation loops, resulting in different Burgers vectors, depending on the degree of overlap between the cascade and the defect. Furthermore, we show that overlapping cascades consistently decrease the size of the pre-existing defect. We also observe void-induced cascade splitting at energies far below the subcascade splitting threshold in tungsten. The impact of these mechanisms on radiation damage accumulation and dose rate effects are discussed. en
dc.format.extent 12
dc.language.iso eng
dc.relation.ispartof Journal of Physics. Condensed Matter
dc.rights cc_by_nc_sa
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject ALLOYS
dc.subject EVOLUTION
dc.subject IN-SITU
dc.subject PURE TUNGSTEN
dc.subject cascade overlap
dc.subject dislocation loops
dc.subject molecular dynamics
dc.subject radiation damage
dc.subject tungsten
dc.subject voids
dc.subject 114 Physical sciences
dc.title Radiation damage in tungsten from cascade overlap with voids and vacancy clusters en
dc.type Article
dc.contributor.organization Materials Physics
dc.contributor.organization Department of Physics
dc.contributor.organization Faculty of Science
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1088/1361-648X/ab2ea4
dc.relation.issn 0953-8984
dc.rights.accesslevel openAccess

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