The knowledge of the relationship between the thermomechanical conditions and the final microstructure and properties of a steel product, often requires a strong interaction between numerical models and experimental data. In this paper, hot strength and recrystallization kinetics of austenite in a Nb microalloyed steel were experimentally investigated by single and double hot compression tests, varying the strain rates and the deformation temperatures. For comparison a plain carbon steel was studied by the same procedures. The effects of deformation temperature, strain rate and addition of Nb on peak stress and softening/ recrystallization fractions of the materials were assessed. The data obtained from the mechanical tests were compared with the results obtained from the metallographic analysis revealing the prior austenitic boundaries and measuring the grain size distribution. Finally, the comparison between the mechanical and metallographic method allowed a better interpretation of the results obtained from the classical double hot compression tests.
|Number of pages||4|
|Publication status||Published - 2012|
|Event||4th International Conference on Thermal Process Modeling and Computer Simulation - Shanghai, China|
Duration: 31 May 2012 → 2 Jun 2012
|Conference||4th International Conference on Thermal Process Modeling and Computer Simulation|
|Period||31/05/2012 → 02/06/2012|