Multilevel model of polycrystalline materials: grain boundary sliding description

International Conference "Modern Technologies and Materials of New Generations"

Sharifullina, E.^1 ; Shveykin, A.^1 ; Trusov, P.^1

Department of Mathematical Modeling of Systems and Processes, Perm National Research Polytechnic University, 29 Komsomolsky prospekt, Perm

614990, Russia^1

关键词: Computational experiment;    Crystal plasticity;    Deformation mechanism;    Deformation regimes;    Elevated temperature;    Inelastic deformation;    Structural superplasticity;    Thermo-mechanical effects;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/286/1/012026/pdf
DOI  :  10.1088/1757-899X/286/1/012026

来源: IOP

【 摘 要 】

Material behavior description in a wide range of thermomechanical effects is one of the topical areas in mathematical modeling. Inclusion of grain boundary sliding as an important mechanism of polycrystalline material deformation at elevated temperatures and predominant deformation mechanism of metals and alloys in structural superplasticity allows to simulate various deformation regimes and their transitions (including superplasticity regime with switch-on and switch-off regimes). The paper is devoted to description of grain boundary sliding in structure of two-level model, based on crystal plasticity, and relations for determination the contribution of this mechanism to inelastic deformation. Some results are presented concerning computational experiments of polycrystalline representative volume deformation using developed model.