Simulation of Recrystallisation and Grain Size Evolution in Hot Metal Forming
- Conference date: 27–29 April 2011
- Location: Belfast, (United Kingdom)
The paper presents an approach that combines the simulation of technological processes on two levels. One of them is the finite element model that predicts material flow and temperature distribution in the workpiece during any multi‐stage deformation where forming steps can be separated by heating/cooling of the billet. The second level is a semi‐empirical microstructural model that simulates static and dynamic recrystallisation and grain growth during deformation or dwelling time. The background of the microstructural model is Sellars formulation. The model parameters are derived by parameterization of the experiments done with the material specimens for a wide range of strain, strain‐rate, temperature variation and pause time. This model has been integrated in QForm3D software and tested for several practical cases of open and closed die forging. The case studies have shown good agreement between the simulation results and practice that have opened the way for its implementation in industry.
- Element formation
- Experiment design
- Finite element methods
- Separated flows
- Stress strain relations
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