MODELING OF DYNAMIC RECRYSTALLIZATION OF Ti6Al4V ALLOY USING A CELLULAR AUTOMATON APPROACH
来源期刊：Acta Metallurgica Sinica2008年第4期
论文作者：F.R.Cao W.J.Zhao H.Ding Z.Q.Li H.L.Hou J.W.Zhao
Key words：Ti6Al4V alloy; Dynamic recrystallization; Kinetics; Modeling; Cellular automaton;
Abstract: A cellular automaton (CA) model is established to simulate dynamic recrystallization (DRX) in the β single-phase field of Ti6Al4 V alloy,and the kinetics during DRX pro-cessing has been analyzed.The model employed considers the influences of dynamic recovery,nucleation rate,strain rate and dislocation density on DRX,and practical deformation parameters,such as temperature,strain and strain rate on DRX have been considered in the simulation.The simulated DRX grain size and DRX grain shape agree well with the experimental results,which shows the availability and fea-sibility of the cellular automaton method for the simulation of DRX.The result of kinetics analysis of DRX reveals that the Avrami exponent is variable ranging from 2.4 to 2.9,which increases with the increase of strain rate.
F.R.Cao1，W.J.Zhao1，H.Ding1，Z.Q.Li2，H.L.Hou2，J.W.Zhao1
(1.School of Materials and Metallurgy,Northeastern University,Shenyang 110004,China;
2.Beijing Aeronautical Manufacturing Technology Research Institute,Beijing 100024,China)
Abstract:A cellular automaton (CA) model is established to simulate dynamic recrystallization (DRX) in the β single-phase field of Ti6Al4 V alloy,and the kinetics during DRX pro-cessing has been analyzed.The model employed considers the influences of dynamic recovery,nucleation rate,strain rate and dislocation density on DRX,and practical deformation parameters,such as temperature,strain and strain rate on DRX have been considered in the simulation.The simulated DRX grain size and DRX grain shape agree well with the experimental results,which shows the availability and fea-sibility of the cellular automaton method for the simulation of DRX.The result of kinetics analysis of DRX reveals that the Avrami exponent is variable ranging from 2.4 to 2.9,which increases with the increase of strain rate.
Key words:Ti6Al4V alloy; Dynamic recrystallization; Kinetics; Modeling; Cellular automaton;
【全文内容正在添加中】
