Abstract
In this study the concept of microalloying was applied to TRIP-aided bainitic–ferritic (TBF) sheet steel. A newly designed chemical composition was introduced including significantly reduced Si content. The impact of Nb on phase transformation, microstructure and mechanical properties was investigated. Nb addition was found to indirectly accelerate transformation kinetics through grain refinement resulting in pro-eutectoid ferrite and upper bainite formation. A change in morphology of the bainitic matrix from lath-like to globular was observed as a result of grain refinement. The amount of cementite was reduced and the amount of retained austenite increased through the addition of Nb. The changes in phase transformation and microstructure resulted in significantly improved mechanical properties comprising both elevated stretch formability and edge crack resistance.
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 callDisclaimer: 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.
