STUDY OF TEXTURE RELATED DEFECT STORAGE USING DIFFRACTION TECHNIQUES

E. BENATTI; N. S. DE VINCENTIS; M. C. AVALOS; H-G. BROKMEIER; N. SCHELL; R.E. BOLMARO

Buenos Aires

Congreso; I Congreso Argentino de Técnicas Neutrónicas; 2017

In this work we study the height and shape of X-Ray Diffraction (XRD) peaks to relate the texture development and defect storage in cold rolled Interstitial Free steel (IF) and a F138 Stainless steel. The diffraction experiments were performed using synchrotron light at Petra III station in DESY, Hamburg. The described techniques are readily applicable to neutron diffraction data, with just small procedural corrections. The IF steel was cold rolled to a 75 % reduction and exhibits the typical rolling texture with gamma and alpha fibers. The Full Width at Half Maxima (FWHM) of the diffraction peaks was used to assess the amount of defects of every crystal population, and was found that the gamma fiber tends to store most of the defects, while the alpha fiber is more or less clean of defects. The F138 sample was cold rolled to a 70 % reduction and shows G/B(T) as a main texture component, while also showing a Goss and weak Dillamore components. Both the Goss and the G/B(T) exhibit a low concentration of defects, which seem to be stored in the neighboring components. This study was backed up by microstructural analysis using Electron Backscatter Diffraction (EBSD) measurements.