The influence of gadolinium concentration on the twin propagation rate in magnesium alloys

0571073 - ÚFM 2024 RIV CH eng J - Článek v odborném periodiku
Máthis, K. - Farkas, A. - Knapek, M. - Ostapovets, Andriy - Farkas, Gergely - Németh, Gergely - Harcuba, P. - Drozdenko, D.
The influence of gadolinium concentration on the twin propagation rate in magnesium alloys.
Journal of Alloys and Compounds. Roč. 948, JUL (2023), č. článku 169635. ISSN 0925-8388. E-ISSN 1873-4669
Grant CEP: GA ČR(CZ) GA18-07140S; GA MŠMT LM2018111
Institucionální podpora: RVO:68081723 ; RVO:61389005
Klíčová slova: Magnesium * Ultra-high-speed imaging * Twinning * Jerky motion * Molecular dynamics
Obor OECD: Materials engineering; Condensed matter physics (including formerly solid state physics, supercond.) (UJF-V)
Impakt faktor: 6.2, rok: 2022
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S0925838823009386?via%3Dihub

Ultra-high-speed camera (UHSC) imaging was used for the study of the influence of gadolinium (Gd) content on the longitudinal growth of twins in Mg-Gd binary alloys. The results clearly indicate that the twin propagation rate is of the order of 101 m/s and slows down with increasing Gd concentration. Concurrent molecular dynamics (MD) simulations reveal that the presence of Gd atoms enhances the formation of stacking faults (SFs), which hinder twin propagation as effectively as twin boundary pinning by Gd solutes. As a result, the twin tip exhibits intermittent motion at the microscopic level.(c) 2023 Elsevier B.V. All rights reserved.
Trvalý link: https://hdl.handle.net/11104/0342380