TY - JOUR
T1 - On the effect of deformation twinning and microstructure to strain hardening of high manganese austenitic steel 3D microstructure aggregates at large strains
AU - Lindroos, Matti
AU - Laukkanen, Anssi
AU - Cailletaud, Georges
AU - Kuokkala, Veli
PY - 2017/10/15
Y1 - 2017/10/15
N2 - The hardening and deformation characteristics of Hadfield
microstructure are studied to investigate the effect of
microstucture to the material behavior. A crystal
plasticity model including dislocation slip and
deformation twinning is employed. The role of deformation
twinning to the overall strain hardening of the material
is evaluated for two different grain structures. Large
compressive strains are applied on 3D microstructural
aggregates representing the uniform and non-uniform grain
structures of Hadfield steels. The grain structure has an
effect on the strain hardening rate as well as on the
overall hardening capability of the microstructure. A
major reason causing the difference in strain hardening
arises from the different twin volume fraction evolution
influenced by intra-grain and inter-grain interactions. A
mixture of large and small grains was found to be more
favorable for twinning and thus resulting in a greater
hardening capability than uniform grain size.
AB - The hardening and deformation characteristics of Hadfield
microstructure are studied to investigate the effect of
microstucture to the material behavior. A crystal
plasticity model including dislocation slip and
deformation twinning is employed. The role of deformation
twinning to the overall strain hardening of the material
is evaluated for two different grain structures. Large
compressive strains are applied on 3D microstructural
aggregates representing the uniform and non-uniform grain
structures of Hadfield steels. The grain structure has an
effect on the strain hardening rate as well as on the
overall hardening capability of the microstructure. A
major reason causing the difference in strain hardening
arises from the different twin volume fraction evolution
influenced by intra-grain and inter-grain interactions. A
mixture of large and small grains was found to be more
favorable for twinning and thus resulting in a greater
hardening capability than uniform grain size.
KW - austenitic manganese steel
KW - crystal plasticity
KW - deformation twinning
KW - microstructure based modeling
UR - http://www.scopus.com/inward/record.url?scp=85025152227&partnerID=8YFLogxK
U2 - 10.1016/j.ijsolstr.2017.07.015
DO - 10.1016/j.ijsolstr.2017.07.015
M3 - Article
SN - 0020-7683
VL - 125
SP - 68
EP - 76
JO - International Journal of Solids and Structures
JF - International Journal of Solids and Structures
ER -