| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Austenite Formation and Decomposition V: A Symposium in Memory of Prof. Mats Hillert
|
| Presentation Title |
The Effect of Deformation on the Bainite Transformation Kinetics |
| Author(s) |
Imed Eddine Benrabah, Arina Deboer, Guillaume Geandier, Hugo Van Landeghem, Christopher Hutchinson, Yves Brechet, Hatem Zurob |
| On-Site Speaker (Planned) |
Imed Eddine Benrabah |
| Abstract Scope |
The present study investigates how plastic deformation affects the growth kinetics of bainitic ferrite plates under two distinct conditions: deformation preceding transformation (ausforming) and simultaneous deformation and transformation. Ausforming was shown to enhance bainite nucleation, refining the microstructure, while simultaneous deformation and transformation result in a less pronounced nucleation effect but a notable increase in plate growth rate.
To rationalize these observations, a modified Zener-Hillert model for plate growth was used, with adjustments to take into account the effect of defects in the matrix and the effect of an applied deformation on the movement of interfacial disconnections. Calculations reveal that after ausforming, stored dislocations impede the growth of bainitic ferrite plates, leading to a reduced lengthening rate. On the other hand, when transformation coincides with deformation, the lengthening rate accelerates due to the interaction between applied stress and disconnections at the tip of the bainitic ferrite plates. |