Basal slip in Laves phases: The synchroshear dislocation

SCRIPTA MATERIALIA

卷:166

Article

Guenole, Julien¹  Mouhib, Fatim-Zahra¹  Huber, Liam²  Grabowski, Blazej²  Korte-Kerzel, Sandra¹ 

[1] Rhein Westfal TH Aachen, Inst Phys Met & Met Phys, D-52056 Aachen, Germany

[2] Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany

关键词: Plasticity;    Complex alloys;    Intermetallic;    Atomistic simulations;    Nudge elastic band;   

DOI  :  10.1016/j.scriptamat.2019.03.016

来源: Elsevier

【 摘 要 】

Two different mechanisms have been reported in previous ab initio studies to describe basal slip in complex intermetallic Laves phases: synchroshear and undulating slip. To date, no clear answer has been given on which is the energetically favourable mechanism and whether either of them could effectively propagate as a dislocation. Using classical atomistic simulations supported by at , initio calculations, the present work removes the ambiguity and shows that the two mechanisms are, in fact, identical. Furthermore, we establish synchroshear as the mechanism for propagating dislocations within the basal plane in Laves phases. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free