Explosive Compaction Using Shock Wave Generated by High-Energy Load from Emulsion Explosive to Improve Hardness of Aluminum 6061

In this study, the emulsion explosive compaction technique was used to improve the hardness of aluminum 6061. Four different specimens were prepared, each undergoing explosive compaction with a different weight of emulsion explosive. The emulsion explosion generates a shock wave propagating through a plunger which acts as a medium for the compaction of a specimen (target). The hardness of the specimens was then tested using a Vickers hardness tester, and the results were compared. The findings indicate that the hardness of aluminum 6061 can be significantly improved using the emulsion explosive compaction technique. The peak hardness values of the specimens were recorded in the middle of the specimens, with the highest values observed for specimens with a higher weight of emulsion explosive. The micro-hardness values of specimens T1 and T2 were found to be 165.9 and 169.2 Hv, respectively, while the micro-hardness value of specimen T0 (without explosive compaction) was 119.5 Hv. The micro-hardness values of specimens T1, T2, and T3 increased by 29.2%, 32.1%, and 9.3%, respectively, compared to specimen T0. The hardness profile of the specimens showed that the highest values were observed in the middle section of the specimens, specifically at distances between 20 and 30 mm from the edge. The average micro-hardness values of the specimens were also found to be significantly improved compared to specimen T0. In conclusion, emulsion explosive compaction is a useful technique for enhancing the hardness of aluminum 6061. This study provides insights for further research on the mechanical properties of materials and the potential of explosive compaction for enhancing other mechanical properties of materials.