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

0571073 - ÚFM 2024 RIV CH eng J - Journal Article
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
R&D Projects: GA ČR(CZ) GA18-07140S; GA MŠMT LM2018111
Institutional support: RVO:68081723 ; RVO:61389005
Keywords : Magnesium * Ultra-high-speed imaging * Twinning * Jerky motion * Molecular dynamics
OECD category: Materials engineering; Condensed matter physics (including formerly solid state physics, supercond.) (UJF-V)
Impact factor: 6.2, year: 2022
Method of publishing: Limited access
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.
Permanent Link: https://hdl.handle.net/11104/0342380