航空材料学报2011，Vol.31Issue(z1)：57-62,6.
CA-FEM模拟β21S合金多道次热变形过程中的组织演变
Simulation of Microstructure Evolution of β21S Alloy During Multi-pass Hot Deformation by CA-FEM
韩逢博 1李金山 1寇宏超 1唐斌 1常辉1
作者信息
- 1. 西北工业大学凝固技术国家重点实验室,西安,710072
- 折叠
摘要
Abstract
A CA-FEM model was build based on an modified cellular automata and nonlinear finite element, by which the microstruc-ture evolution of β21S alloy during multi-pass non-isothermal hot compression was numerically simulated. The finite element analysis was conducted to acquire local parameters such as strain, strain rate, and temperature. These values were provided to the cellular automata model as input. Physical metallurgical phenomena such as hot deformation, static recrystallization (SRX ) , meta-dynamic re-crystallization ( Meta-DRX) and dynamic recrystallization ( DRX) , were taken into consideration during the simulation. The simulation results indicated that the local parameters during hot deformation had great effect on the microstructure evolution. The recrystallization fraction at the center of the work-piece is higher than that at the end, which leads to a more refining region at the center of the work-piece. DRX influences the transformation kinetics and the final recrystallized microstructure more markedly than SRX during multi-pass hot deformation.关键词
钛合金/元胞自动机/有限元/多道次热变形Key words
titanium alloy/cellular automata/finite element method/multi-pass hot deformation引用本文复制引用
韩逢博,李金山,寇宏超,唐斌,常辉..CA-FEM模拟β21S合金多道次热变形过程中的组织演变[J].航空材料学报,2011,31(z1):57-62,6.
