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Point defect intera...
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Petrik, M. V.
(författare)
Point defect interactions with Guinier-Preston zones in Al-Cu based alloys : Vacancy mediated GPZ to θ′-phase transformation
- Artikel/kapitelEngelska2019
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Acta Materialia Inc,2019
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Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:kth-246433
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-246433URI
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https://doi.org/10.1016/j.scriptamat.2019.02.024DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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QC 20190329
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The energetics of point defect interactions with a Guinier-Preston zone (GPZ) in Al alloys are systematically studied using ab initio calculations and a supercell approach. We find that vacancies can be trapped by GPZs and that the presence of a vacancy in a Cu layer qualitatively changes the solute–GPZ interactions. A vacancy mediated mechanism of GPZ to θ′-phase transformation is suggested and shown to be thermodynamically feasible, which involves the formation of structural vacancies and splitting of a GPZ layer into two half-vacant Cu layers. This mechanism, in combination with the calculated attractive solute-vacancy interactions, is predicted to result in the solute segregation at the interface between Al matrix and the forming θ′-phase precipitate.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Gornostyrev, Y. N.
(författare)
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Korzhavyi, Pavel A.,1966-KTH,Materialvetenskap(Swepub:kth)u17nfa0i
(författare)
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KTHMaterialvetenskap
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Scripta Materialia: Acta Materialia Inc165, s. 123-1271359-64621872-8456
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