Результаты исследований: Публикации в книгах, отчётах, сборниках, трудах конференций › статья в сборнике материалов конференции › научная › Рецензирование
Fully coupled two-phase composite model for microstructure evolution during non-proportional severe plastic deformation. / Shutov, Alexey.
Superplasticity in Advanced Materials - ICSAM 2018. Том 385 DDF Trans Tech Publications Ltd, 2018. стр. 234-240.Результаты исследований: Публикации в книгах, отчётах, сборниках, трудах конференций › статья в сборнике материалов конференции › научная › Рецензирование
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TY - GEN
T1 - Fully coupled two-phase composite model for microstructure evolution during non-proportional severe plastic deformation
AU - Shutov, Alexey
N1 - Publisher Copyright: © 2018 Trans Tech Publications, Switzerland
PY - 2018/1/1
Y1 - 2018/1/1
N2 - A fully coupled micro-macro interaction model is proposed for the grain refinement caused by severe plastic deformation of cell-forming metallic materials. The model is a generalization of a previously proposed two-phase composite model suggested for the evolution of dislocation populations corresponding to the interior of the dislocation cells and dislocation cell walls. Just as within the original framework, the evolution of the material microstructure depends on the applied hydrostatic pressure, strain rate, and the loading path. Backstresses are used to define a measure of the strain path change. Thereby, the model can describe the experimentally observed dissolution of dislocation cells and the reduction of dislocation densities occurring shortly after load path changes. The large strain kinematics is accounted for in a geometrically exact manner using the nested split of the deformation gradient tensor, proposed by Lion. Within the extended model, the macroscopic strength of the material depends on the microstructural parameters. In that sense, the new model is fully coupled. It is thermodynamically consistent, objective, and w-invariant under isochoric changes of the reference configuration. A physical interpretation is provided for the nested multiplicative split in terms of the two-phase microstructure composite model.
AB - A fully coupled micro-macro interaction model is proposed for the grain refinement caused by severe plastic deformation of cell-forming metallic materials. The model is a generalization of a previously proposed two-phase composite model suggested for the evolution of dislocation populations corresponding to the interior of the dislocation cells and dislocation cell walls. Just as within the original framework, the evolution of the material microstructure depends on the applied hydrostatic pressure, strain rate, and the loading path. Backstresses are used to define a measure of the strain path change. Thereby, the model can describe the experimentally observed dissolution of dislocation cells and the reduction of dislocation densities occurring shortly after load path changes. The large strain kinematics is accounted for in a geometrically exact manner using the nested split of the deformation gradient tensor, proposed by Lion. Within the extended model, the macroscopic strength of the material depends on the microstructural parameters. In that sense, the new model is fully coupled. It is thermodynamically consistent, objective, and w-invariant under isochoric changes of the reference configuration. A physical interpretation is provided for the nested multiplicative split in terms of the two-phase microstructure composite model.
KW - Dislocation cells
KW - Isotropic
KW - Kinematic hardening
KW - Microstructure evolution
KW - Nested multiplicative split
KW - Non-proportional loading
KW - Severe plastic deformation
UR - http://www.scopus.com/inward/record.url?scp=85052730791&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/DDF.385.234
DO - 10.4028/www.scientific.net/DDF.385.234
M3 - Conference contribution
AN - SCOPUS:85052730791
SN - 9783035713459
VL - 385 DDF
SP - 234
EP - 240
BT - Superplasticity in Advanced Materials - ICSAM 2018
PB - Trans Tech Publications Ltd
T2 - 13th International Conference on Superplasticity in Advanced Materials, ICSAM 2018
Y2 - 19 August 2018 through 22 August 2018
ER -
ID: 16330706