Recrystallization kinetics of austenite in Nb microalloyed steel

R. Gerosa, B. Rivolta, Elham Moumeni, E. Tecchiati, A. Paggi, E. Anelli

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Abstract

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.
Original languageEnglish
Publication date2012
Number of pages4
Publication statusPublished - 2012
Externally publishedYes
Event4th International Conference on Thermal Process Modeling and Computer Simulation - Shanghai, China
Duration: 31 May 20122 Jun 2012

Conference

Conference4th International Conference on Thermal Process Modeling and Computer Simulation
Country/TerritoryChina
CityShanghai
Period31/05/201202/06/2012

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