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. Inter...

Recrystallization kinetics and two critical temperatures—the non-recrystallization temperature TNR the static recrystallization TSRCT—of five Nb, Ti, V microalloyed steel grades are evaluated. The experimental examination is realized by employing isothermal double-hit compression tests continuous hot torsion tests, both performed on a Gleeble® 3800 thermo-mechanical simulator. results used for ...

It is a great challenge to develop semicrystalline polyimides exhibited significant recrystallization ability and fast crystallization kinetics from the melt. A series of semicrystalline polyimides based on 1,4-bis(3,4-dicarboxyphenoxy)benzene dianhydride (HQDPA) and different diamines, including 1,3-bis(4-aminophenoxy)benzene (TPER), 1,4-bis(4-aminophenoxy)benzene (TPEQ), 4,4′-oxydianiline (4,...

Dynamic recrystallization (DRX) processes are widely used in industrial hot working operations, not only to keep the forming forces low but also to control the microstructure and final properties of the workpiece. According to the second derivative criterion (SDC) by Poliak and Jonas, the onset of DRX can be detected from an inflection point in the strain-hardening rate as a function of flow st...