Abstract
The effects of austenite grain size and deformation in the unrecrystallized austenite region on bainite transformation behavior and microstructural characteristics were investigated under continuous cooling condition and compared with those in ferrite-pearlite transformation and martensite transformation. Austenite grain size does not affect the transformation temperature and resulting microstructure of bainitic ferrite except that nucleation site of bainitic ferrite is increased with the decrease in equiaxed austenite grain size. But the volume fraction of the transformed products depends on the temperature during continous cooling and does not change with the prior austenite grain size. These characteristics are quite different from those in ferrite-pearlite transformation. The deformation in the unrecrystallized austenite region raises the transformation temperature and decreases the hardness of bainitic ferrite. Kurdjumov-Sachs relationship holds between austenite and bainitic ferrite irrespective of prior austenite microstructure. No contribution of austenite grain boundary for the growth of bainitic ferrite seems to indicate the intensive involvement of the displacive mechanism in this transformation.
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.
