Microstructures Characterization of Quenched Rebars using Electron Back- Scatter Diffraction Technique

摘要

Steel rebars produced through water quenching exhibit composite microstructure due to different cooling rates experienced within the material during processing. These rebars are characterized by their higher strength and comparatively better corrosion resistance as compared to those produced through conventional hot rolling process. These characteristics are attributed to the composite microstructure of these rebars. The Electron Back-Scatter Diffraction (EBSD) technique offers an innovative way to analyze such microstructures more effectively and efficiently than the traditional light microscopy or Scanning Electron Microscopy (SEM). The measurement tools available with EBSD, such as image quality values and precise grain boundary misorientation angles, provide new approaches to characterize microstructures. The fact that the different ferrite morphologies, studied in this work, exist within the same sample, reduces the effect of experimental set-up on pattern quality. A thorough understanding of these microstructures is important to control the resultant mechanical properties and evaluate the corrosion behaviour for such rebars.