INVESTIGADORES
BOLMARO Raul Eduardo
congresos y reuniones científicas
Título:
Study of the microstructure of a cold rolled interstitial free steel through X-Ray Diffraction and Electron Back-Scatter Diffraction
Autor/es:
E. A. BENATTI; N. S. DE VINCENTIS; M. AVALOS; H. G. BROKMEIER; N. SCHELL; R.E. BOLMARO
Lugar:
Saint George
Reunión:
Conferencia; 18th International Conference on Textures of Materials; 2017
Institución organizadora:
Brigham Young University, Utah.
Resumen:
Hot and cold rolling are used for large-scale industrial processes, and can produce a rather complex intermixing of grain refinement, dislocation arrays and stacking faults, distorting the crystallographic lattice and interfering with the motion of other defects. X-Ray Diffraction (XRD) allows a global characterization of the microstructure, through the analysis of the height and shape of the diffraction peaks. Moreover, synchrotron XRD enables such analysis in relation with the sample orientation. Electron Back Scatter Diffraction (EBSD) studies, on the other hand, allows a more direct although local kind of study. In this work we use XRD to determine the texture of an Interstitial Free Steel, cold rolled to 70 % reduction, and relate the measured texture with the defect storage on different texture components through diffraction peak broadening analysis. To that end we create Generalized Pole Figures (GPF) of Full Width Half Maximum (FWHM), and use the pole figure to ODF inversion method in the FWHM GPFs to find a generalized Orientation Distribution Function (ODF) which can be compared with the regular ODF used in texture analysis. Finally, we compare these results with EBSD measurements of the same sample to obtain a more direct estimation of the anisotropy of the defect storage of the sample. We found that the gamma fiber, usually present in rolled BCC materials is the component which tend to store more defects, although X-Ray diffraction methods fail to distinguish which kind of defects are the ones being stored. The typical alpha fiber was also found but it was rather cleaner from defects. Both results are in agreement with previous literature results for similar materials.
