Discrete dislocation dynamics simulations of twin size-effects in magnesium. Issue 1741 (12th February 2015)

• Record Type: Journal Article
• Authors: Fan, Haidong; Aubry, Sylvie; Arsenlis, A.; El-Awady, Jaafar A.
• Editors: Albrecht, M.; Aubry, S.; Collazo, R.; Mishra, R. K.; Wu, C-C.
• Is Part Of: MRS proceedings. Issue 1741:(2015)
• Publication Date: 2015-02-12
• Subjects: dislocations, -- Mg, -- polycrystal; Electrical engineering -- Congresses; Physics -- Congresses; Materials -- Research -- Congresses; Materials science -- Congresses; 620.11
• DOI: 10.1557/opl.2015.86
• Languages: English
• ISSNs: 0272-9172

Abstract

ABSTRACT: A dislocation-{101̅2} twin boundary (TB) interaction model was proposed and introduced into discrete dislocation dynamics simulations to study the mechanical behavior of micro-twinned Mg. Strong strain hardening was captured by current simulations, which is associated with the strong TB's barrier effect. In addition, twin size effects with small TB spacing leading to a strong yield stress, were observed to be orientation dependent. Basal slip orientation produces a strong size effect, while prismatic slip does a weak one.