Year-end Sale % OFF 
Abstract
A low carbon steel and a vanadium and niobium microalloyed steel were deformed by torsion with the true strain rates from about 10-3 to 10s-1 in the temperature range from 900 to 1200°C. Through the determination of their flow behavior and the observation of the deformed microstructure, dynamic recrystallization behavior was analyzed.Austenite grain refinement by dynamic recrystallization and final ferrite grain refinement due to microalloying elements in the course of thermomechanical treatments were simulated by using a torsion machine. The final grain size in air-cooled specimen was much reduced in the schedule including only one stage deformation at 800°C particularly in the microalloyed steel. The microstructures in the thermomechanical processes revealed the characteristic feature of dynamic restoration process in the two phases region of steels. Especially in the microalloyed steel, austenite recrystallized partly at grain boundaries, whereas grain fragmentation like subgrain formation proceeded in ferrite.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Transactions of the Iron and Steel Institute of Japan
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
