In-Situ Annealing Study of Transformation of alpha and gamma Texture of Interstitial-Free Steel Sheet by High-Energy X-Ray Diffraction
Résumé
High-energy synchrotron diffraction offers great potential for experimental study of recrystallization kinetics. An experimental design to study the recrystallization mechanism of interstitial-free (IF) steel was implemented. The whole annealing process of cold-rolled IF steel with 80% reduction was observed in situ using high-energy X-ray diffraction (HEXRD). The results show how the main texture component of IF steel change, i. e. the alpha [<110> // rolling direction (RD)] fiber texture decreases and the gamma [<111>//normal direction (ND)] fiber texture increases. The important part of the alpha fiber texture is that both the \100\<011> and \112\<011> texture decrease at the beginning of recrystallization. The gamma fiber texture increases at the early stage of recrystallization which stems from the increase of \111\<112>. Nevertheless, the \111\<110> does not change after recrystallization. The dynamic evolution of the main texture components \100\<011> \112\<011> \111\<112> and \111\<110> is given by in-situ HEXRD.