|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Advanced High Strength Steels V
||Ferrite Recrystallization Investigated by In Situ High Energy X-ray Diffraction Experiments
||Clelia Couchet, Sébastien Allain, Julien Teixeira, Marc Moreno, Guillaume Geandier, Frédéric Bonnet
|On-Site Speaker (Planned)
Competitive recovery and recrystallization of a conventional low carbon ferritic steel have been investigated in situ thanks to High Energy X-Ray Diffraction experiments and original automated spot detection and tracking methods. These experiments has been carried out on P07 beamline in PETRA III at DESY (Hambourg) with a monochromatic beam (100 keV). High flux from synchrotron source and fast high-throughput 2D detector (Perkin-Elmer) collects Debye-Scherrer (DS) diffraction patterns at significant rate (10hz). Four isothermal annealing temperatures (450°C, 500°C, 550°C and 650°C) have been studied. Recovery kinetics has been determined using a modified Williamson-Hall method inspired by Ungar et al. (Appl. Phys. Lett. 69, 3173 (1996)) and compared to the prediction of recovery models. Recrystallization has been followed by tracking isolated diffraction spots on DS rings produced by newly recrystallized grains. This work aims to provide better understanding for recovery and recrystallization processes, both influencing final mechanical properties of steels.