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 dissocia-tion 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.
@article{arxiv.1812.11408,
title = {Basal slip of a screw dislocations in hexagonal titanium},
author = {Piotr Kwasniak and Emmanuel Clouet},
journal= {arXiv preprint arXiv:1812.11408},
year = {2019}
}