Basal slip of ⟨a⟩ screw dislocations in hexagonal titanium

Piotr Kwaśniak , Emmanuel Clouet

Abstract

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], (A 35 pkt, Not active)
Issue year2019
Vol162
Pages296-299
Publication size in sheets0.5
Keywords in PolishTytan, plastyczność, dyslokacje, ab initio, poślizg bazowy
Keywords in EnglishTitanium, Plasticity, Dislocations, Ab initio, Basal slip
ASJC Classification3104 Condensed Matter Physics; 2500 General Materials Science; 2200 General Engineering
DOIDOI:10.1016/j.scriptamat.2018.11.027
URL https://www.sciencedirect.com/science/article/pii/S1359646218307085
Languageen angielski
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PKwasniak_Basal slip of ⟨a⟩ screw dislocations in hexagonal titanium.pdf 1.75 MB
Score (nominal)35
ScoreMinisterial score = 35.0, 25-04-2019, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 07-01-2019, ArticleFromJournal
Publication indicators Scopus Citations = 0; WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.696; WoS Impact Factor: 2017 = 4.163 (2) - 2017=3.982 (5)
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