Basal slip of ⟨a⟩ screw dislocations in hexagonal titanium

Piotr Kwaśniak , Emmanuel Clouet


Basal slip of ⟨a⟩ screw dislocations in hexagonal closed-packed titanium is investigated with ab initio calculations. We show that a basal dissociation is highly unstable and reconfigures to other structures dissociated in a first order pyramidal plane. The obtained mechanism for basal slip corresponds to the migration of the partial dislocations and of the associated stacking fault ribbon in a direction perpendicular to the dissociation plane. Presented results indicate that both basal and pyramidal slip will operate through the Peierls mechanism of double-kink nucleation and will be equally active at high enough temperature.
Author Piotr Kwaśniak (FMSE / DMD)
Piotr Kwaśniak,,
- Division of Materials Design
, Emmanuel Clouet - [Universite Paris-Saclay]
Emmanuel Clouet,,
Journal seriesScripta Materialia, [Scripta Metallurgica et Materialia], ISSN 1359-6462, [0036-9748]
Issue year2019
Publication size in sheets0.5
Keywords in PolishTytan, plastyczność, dyslokacje, ab initio, poślizg bazowy
Keywords in EnglishTitanium, Plasticity, Dislocations, Ab initio, Basal slip
ASJC Classification2200 General Engineering; 2500 General Materials Science; 3104 Condensed Matter Physics
Languageen angielski
PKwasniak_Basal slip of ⟨a⟩ screw dislocations in hexagonal titanium.pdf 1.75 MB
Score (nominal)140
Score sourcejournalList
ScoreMinisterial score = 140.0, 10-06-2020, ArticleFromJournal
Publication indicators Scopus Citations = 2; WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.696; WoS Impact Factor: 2018 = 4.539 (2) - 2018=4.559 (5)
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