Effect of Strain on Recrystallisation during Hot Deformation of Nb-Containing Microalloyed Steel

Abstract:

The Dutta-Sellars equations for predicting recrystallisation and precipitation in microalloyed steels have been assessed for accuracy over a range of strain levels (0.15 to 0.45) during hot deformation (975-1075 °C) of a homogenised 0.045 wt % Nb steel. It has been found that the model predicts the deformation state well at a strain of 0.3 whereas at both lower and higher strains i.e. 0.15 and 0.45, the agreement is less good. The differences between prediction and experimental measurement have been related to solute drag and precipitate potential of Nb.

• Periodical: Materials Science Forum (Volumes 715-716)
• Pages: 690-695
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.715-716.690
• Online since: April 2012
• Authors: Amrita Kundu, Claire L. Davis, Martin Strangwood
• Keywords: Deformation, Microalloyed Steel, Recrystallization, Strain-Induced Precipitation

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