Faceting of {11(2)over-bar6} twin interfaces in rolled pure magnesium

0556949 - ÚFM 2023 RIV GB eng J - Článek v odborném periodiku
Verma, Ritu - Král, Lubomír - Ostapovets, Andriy
Faceting of {11(2)over-bar6} twin interfaces in rolled pure magnesium.
Philosophical Magazine. Roč. 102, č. 10 (2022), s. 861-874. ISSN 1478-6435. E-ISSN 1478-6443
Grant CEP: GA ČR(CZ) GA18-07140S
Institucionální podpora: RVO:68081723
Klíčová slova: structural-characterization * atomic-resolution * boundaries * dislocations * mg * alloys * growth * Magnesium * twin boundary * interfaces * atomistic simulations * sem * tem
Obor OECD: Materials engineering
Impakt faktor: 1.6, rok: 2022
Způsob publikování: Omezený přístup
https://www.tandfonline.com/doi/abs/10.1080/14786435.2021.2022232?journalCode=tphm20

Recent studies proved that the faceting of twin boundaries is a common feature in hcp materials. It was demonstrated that the asymmetrical facets in the most frequent {10 (1) over bar2} and {10 (1) over bar1} twin interfaces are the consequence of the twin boundary migration mechanism. We demonstrate that a similar mechanism is also applicable to less common {11 (2) over bar6} twins, observed in pure magnesium rolled at room temperature. The migration of {11 (2) over bar6} twin boundary is mediated by disconnections, which have Burgers vector b = 0.030[11 (2) over bar(1) over bar] and step height equal to four {11 (2) over bar6} interplanar distances. The mechanism of asymmetrical facets nucleation is also demonstrated by using atomistic simulations. The simulations are supported by transmission electron microscopy (TEM) of asymmetrical basal-pyramidal interfaces of {11 (2) over bar6} twins.
Trvalý link: https://hdl.handle.net/11104/0333874