Abstract
Aluminum alloy materials are the primary choice for lightweight components. High-velocity compaction (HVC) enhances the density of diverse materials. This study utilizes HVC to enhance the density of aluminum alloy. This work examined the influence of compaction velocity, response time (Γ), compaction times, and height-diameter ratio on the impact force of HVC. The maximum force increased linearly with higher compaction velocity, reaching up to 700 kN when the compaction velocity was 9.4 m/s, alongside achieving a peak relative density of 95%. Investigation into the influence of compaction times on the impact force of HVC revealed that the state of powders were critical factors affecting the magnitude of impact force. When the total compaction energy was consistent, the maximum force from double strokes was observed to be lower compared to single stroke. Furthermore, in double strokes with the same second stroke of 55 mm, it was noted that the maximum force increased with higher velocity during the initial compaction. Additionally, both the maximum force and green density decreased as the height-diameter ratio increased. When the height-diameter was 0.4, the maximum force and green density were higher 251 kN, 0.22 g/cm3 than that of 1.2.
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