The present work focusses on the onset of the critical stress for the DT of austenite to ferrite during double hit deformation complemented with microstructural analysis to verify the observations. The following are conclusions from the present research.
  1. The flow stress increases with the decrease in the temperature and increase in the strain rate for both temperatures and strain rates.
  2. The critical stress associated with the onset of DT during the first deformation is higher than the critical stresses measured during the second hit deformation.
  3. The critical stress increases with temperature and strain rates for both first and double hit deformations.
The authors acknowledge with gratitude funding received from the Natural Sciences and Engineering Research Council of Canada (NSERC), New Brunswick Innovation Foundation (NBIF) and Harrison McCain Foundation.
Authors have no conflict of interest relevant to this article