Basal slip of ⟨a⟩ screw dislocations in hexagonal titanium
Piotr Kwaśniak , Emmanuel Clouet
AbstractBasal 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.
|Journal series||Scripta Materialia, [Scripta Metallurgica et Materialia], ISSN 1359-6462, [0036-9748]|
|Publication size in sheets||0.5|
|Keywords in Polish||Tytan, plastyczność, dyslokacje, ab initio, poślizg bazowy|
|Keywords in English||Titanium, Plasticity, Dislocations, Ab initio, Basal slip|
|ASJC Classification||; ;|
|Score||= 140.0, 10-06-2020, ArticleFromJournal|
|Publication indicators||= 2; = 0; : 2016 = 1.696; : 2018 = 4.539 (2) - 2018=4.559 (5)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.