Analyzing the Effect of Dynamic Impact in 6061 Al Alloy Using MATLAB as a Post Processing Tool

This study focuses on writing MATLAB code for the post processing of data received after investigating the behaviour of friction stir processed samples under impact conditions. For this study the experimental techniques was used which includes Electron Backscatter Diffraction (EBSD), data processing through MATLAB, and microstructural analysis to have a comprehensive understanding of the material’s microstructure and mechanical property. The key findings and conclusions drawn from this work are that a MATLAB code was developed to process data obtained from Split Hopkinson Pressure Bar (SHPB) experiments. The raw data was processed to generate true stress versus true strain graph. Microstructural analysis through Electron Backscatter Diffraction (EBSD) showed significant grain refinement in the impacted samples compared to the base sample. Additionally, the impacted samples showed reduction in geometrically necessary dislocations (GNDs) and an increase in misorientation of high-angle grain boundaries (HAGB). The impacted samples showed ultimate tensile strength of 400 MPa and a ductility of approximately 20%. Also, the formation of adiabatic shear bands (ASBs) was observed in the impacted samples, demonstrating their significant influence on the plastic deformation behaviour of the material. Overall, this research study provides valuable insights into the impact behaviour of friction stir processed samples. The findings contribute to a deeper understanding of the material’s mechanical response, microstructural changes, and the role of adiabatic shear bands. These insights have implications for optimizing materials for high-strain-rate applications. The code written for the SHPB data processing can be used for any material.