Analysis of Residual Stresses in Deformed Aluminum Bars: MECH2430

This report details an investigation into the distribution of residual stresses within deformed aluminum bars, specifically 6061-T6 and 7075-T6 alloys. The study employed a four-point bending apparatus to induce deformation, followed by tensile tests to determine material properties. Neutron diffraction was utilized to measure residual strains, and the diffraction data was subsequently analyzed to establish the stress distribution along the y-axis of the bars. The report includes details on sample preparation, experimental procedures, and data analysis techniques. Results are presented in tabular and graphical formats, with a discussion on the observed stress patterns and a comparison of the experimental findings with theoretical expectations. Error analysis is also included to assess the reliability of the results. The conclusion summarizes the key findings regarding the residual stress distribution within the aluminum bars and their correlation with the deformation process.