TY - GEN
T1 - A dislocation-based crystal plasticity simulation on kink band formation and evolution in polycrystalline Mg alloy with LPSO phase
AU - Ueta, Ryo
AU - Shizawa, Kazuyuki
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2015
Y1 - 2015
N2 - A three-dimensional compression analysis is performed by finite element method using a dislocation-based crystal plasticity model to clarify the formation mechanism of kink band in a polycrystalline Mg alloy with a long-period stacking ordered structure (LPSO) phase. The crystalline structure of LPSO phase is regarded as a HCP for simplicity, however, any deformation twinning is not taken into account. In addition, the activities of non-basal systems are considerably limited in the LPSO phase setting the values of their critical resolved shear stresses to large ones. We analyze a simple polycrystalline specimen composed of two α-Mg matrix phases and a LPSO phase both having a rectangular shape and twist grain boundaries are introduced into the interface. The obtained result shows that the kink band formation in the alloy is accomplished by the basal slips with different variants and the non-basal slips are activated on the grain boundary to maintain the continuity of deformation.
AB - A three-dimensional compression analysis is performed by finite element method using a dislocation-based crystal plasticity model to clarify the formation mechanism of kink band in a polycrystalline Mg alloy with a long-period stacking ordered structure (LPSO) phase. The crystalline structure of LPSO phase is regarded as a HCP for simplicity, however, any deformation twinning is not taken into account. In addition, the activities of non-basal systems are considerably limited in the LPSO phase setting the values of their critical resolved shear stresses to large ones. We analyze a simple polycrystalline specimen composed of two α-Mg matrix phases and a LPSO phase both having a rectangular shape and twist grain boundaries are introduced into the interface. The obtained result shows that the kink band formation in the alloy is accomplished by the basal slips with different variants and the non-basal slips are activated on the grain boundary to maintain the continuity of deformation.
KW - Crystal Plasticity
KW - Deformation Kink
KW - Dislocation
KW - Finite Element Method
KW - LPSO Phase
KW - Magnesium alloy
UR - http://www.scopus.com/inward/record.url?scp=84907074164&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84907074164&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/KEM.626.281
DO - 10.4028/www.scientific.net/KEM.626.281
M3 - Conference contribution
AN - SCOPUS:84907074164
SN - 9783038352266
T3 - Key Engineering Materials
SP - 281
EP - 286
BT - Advances in Engineering Plasticity XII
PB - Trans Tech Publications Ltd
T2 - 12th Asia-Pacific Conference on Engineering Plasticity and Its Application, AEPA 2014
Y2 - 1 September 2014 through 5 September 2014
ER -