Наукова електронна бібліотека
періодичних видань НАН України
періодичних видань НАН України
Peierls barriers of a-type edge and screw dislocations moving on basal and prismatic planes in magnesium
Репозиторій DSpace/Manakin
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Peierls barriers of a-type edge and screw dislocations moving on basal and prismatic planes in magnesium
Тема:
Низкотемпературная физика пластичности и прочности
Інший ID:
PACS: 61.72.Lk, 62.20.fq, 82.20.Wt
Посилання:
Peierls barriers of a-type edge and screw dislocations moving on basal and prismatic planes in magnesium / A. Ostapovets, O. Vatazhuk // Физика низких температур. — 2017. — Т. 43, № 3. — С. 520-528. — Бібліогр.: 40 назв. — англ.
Підтримка:
Authors acknowledge financial support from Czech
Science Foundation (project 16-14599S) and Ministry of
Education, Youth and Sports of the Czech Republic under
the project CEITEC 2020 (LQ1601). Besides authors
gratefully acknowledge Dr. Roman Gröger for discussion
and provision his NEB code.
Дата:
2017
Переглядів:
619
Завантажень:
689
Анотація:
Exact shape of Peierls barriers are calculated for ⟨ a⟩ edge and screw dislocation gliding on basal and prismatic planes in magnesium by using of several popular interatomic potentials. Comparison of these potentials is performed in order to describe their abilities and limitations. Stability of different types of dislocation cores are analyzed as well as their mutual transformations during dislocation slip. It was found that the Peierls stresses and barrier height are dependent on core type. It was concluded that transformations of dislocation cores along minimal energy paths have to be taken into account for development of analytical models of the slip in magnesium. The results are compared with available first-principles calculations.
