Description of Dynamic Recrystallization by Means of An Advanced Statistical Multilevel Model: Grain Structure Evolution Analysis

被引:14
|
作者
Trusov, Peter [1 ]
Kondratev, Nikita [1 ]
Podsedertsev, Andrej [1 ]
机构
[1] Perm Natl Res Polytech Univ, Lab Multilevel Struct & Funct Mat Modeling, Perm 614990, Russia
关键词
multilevel models; dynamic recrystallization; grain shape and grain size; defect and grain structure evolution; CRYSTAL PLASTICITY MODELS; CELLULAR-AUTOMATON; TEXTURE EVOLUTION; SIZE; DEFORMATION; POLYCRYSTALS; SIMULATION; KINETICS; BEHAVIOR; STRAIN;
D O I
10.3390/cryst12050653
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
Physical multilevel models of inelastic deformation that take into account the material structure evolution hold promise for the development of functional materials. In this paper, we propose an advanced (modified via analyzing the mutual arrangement of crystallites) statistical multilevel model for studying thermomechanical processing of polycrystals that includes a description of the dynamic recrystallization process. The model is based on the consideration of homogeneous elements (grains, subgrains) aggregated into a representative volume (macropoint) under the Voigt hypothesis. In the framework of this statistical approach, there is no mandatory requirement for continuous filling of the computational domain with crystallites; however, the material grain structure cannot be created arbitrarily. Using the Laguerre polyhedra, we develop a method of grain structure simulation coupled with subsequent processing and transferring of the necessary data on the grain structure to the modified statistical model. Our research is of much current interest due to the fact that the mutual arrangement of crystallites, as well as the interfaces between them, has a significant impact on the properties of polycrystals, which are particularly important for physical mechanisms that provide and accompany the processes of inelastic deformation (recrystallization, grain boundary hardening, grain boundary sliding, etc.). The results of the simulations of the high-temperature deformation of a copper polycrystal, including the description of the recrystallization process, are presented.
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页数:19
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