MODELING OF DYNAMIC RECRYSTALLIZATION OF Ti6Al4V ALLOY USING A CELLULAR AUTOMATON APPROACH

金属学报(英文版), 2008, 21(4): 260-268.

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.School of Materials and Metallurgy,Northeastern University,Shenyang 110004,China

2.School of Materials and Metallurgy,Northeastern University,Shenyang 110004,China

3.School of Materials and Metallurgy,Northeastern University,Shenyang 110004,China

4.School of Materials and Metallurgy,Northeastern University,Shenyang 110004,China

5.Beijing Aeronautical Manufacturing Technology Research Institute,Beijing 100024,China

6.Beijing Aeronautical Manufacturing Technology Research Institute,Beijing 100024,China

基金项目: the Major Basic Research Programs of National Security

MODELING OF DYNAMIC RECRYSTALLIZATION OF Ti6Al4V ALLOY USING A CELLULAR AUTOMATON APPROACH

J.W.Zhao ^1, , H.Ding ^2, , W.J.Zhao ^3, , F.R.Cao ^4, , H.L.Hou ^5, , Z.Q.Li ^6,

1.School of Materials and Metallurgy,Northeastern University,Shenyang 110004,China

2.School of Materials and Metallurgy,Northeastern University,Shenyang 110004,China

3.School of Materials and Metallurgy,Northeastern University,Shenyang 110004,China

4.School of Materials and Metallurgy,Northeastern University,Shenyang 110004,China

5.Beijing Aeronautical Manufacturing Technology Research Institute,Beijing 100024,China

6.Beijing Aeronautical Manufacturing Technology Research Institute,Beijing 100024,China

Keywords： Ti6Al4V alloy

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.

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MODELING OF DYNAMIC RECRYSTALLIZATION OF Ti6Al4V ALLOY USING A CELLULAR AUTOMATON APPROACH

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