Numerical Study of Deformation Characteristics in Plane Strain Compression Test (psct) Volume Certified following Microstructure

The deformation mode during hot rolling of plates and strips is very similar to ideal plane strain conditions. For this reason it is highly desirable to obtain this deformation mode during laboratory experiments. That’s why the PSC testing is now generally accepted as one of the most reliable methods for the generation of flow stress data and microstructural investigation of flat rolling. Interpretation of the results of the PSC tests is usually bind with strain inhomogeneity of deformation, lateral spread, influence of friction and rigid ends. In order to account such inhomogenities a numerous methods of correction have been developed 1 . The inverse technique is adopted as a most efficient method of identification of the flow stress model. Finite element simulation is usually performed as a solution of direct problem during inverse analysis for identification of flow stress data 2-9 . In the given work the aim of finite element simulation was the identification of distribution of deformation characteristics within specimen volume for further comparison with microstructure data. The dependences of average grain size on deformation conditions obtained by this way were used for determination of SRX kinetics parameters. Most research on static recrystallization kinetics are based on fractional softening method 10 , but this method is not suitable when PSC test in use because of plastic flow inhomogenity. Therefore, the method proposed by Kuziak et al. 11 and based upon analysis of average grin size changes during recrystallization has been used. It employs an equation relating current grain size during recrystallization to the recrystallized grain size Drex , initial grain size D0 end volume fraction of recrystallized material X t ( ):