Microsoft Word - WRAP_thesis_coversheet2

This thesis investigates the ultrasonic characterization of rolled aluminium and steel sheets, correlating findings with measurements obtained from Electron Backscatter Diffraction (EBSD). The objective is to enhance the reliability of non-destructive testing techniques by establishing a link between ultrasonic characteristics and microstructural properties identified through EBSD. A combination of theoretical analysis and experimental measurements was employed, utilizing advanced Electromagnetic Acoustic Transducers (EMATs) to efficiently conduct ultrasonic testing on both materials. The resulting data demonstrated that multiple EBSD scans are essential to accurately represent the texture and microstructure of the sheets, as reliance on single scans proved unreliable. Specifically, it was determined that a minimum sample of approximately 1400 grains is required to yield a statistically significant average texture reading. The research findings advocate for comprehensive analysis by employing in-plane EBSD data to confirm homogeneity within the microstructure of the material under study. This work contributes valuable insights into non-destructive testing methodologies and the mechanical characterization of metals, ultimately fostering improved material utilization in industrial applications.