Magnetic pulse compaction (MPC) technology has the advantages of near net shape, high efficiency and density. In this paper, the effect of aspect ratio on the deformation characteristics of copper powders compacted by MPC technology was studied. Specifically, the compaction velocity, volume strain, micromorphology and micro hardness of compacts at various aspect ratios were obtained. Results showed that the compaction velocity and volume strain increased and then decreased with the increase of aspect ratio. The maximum compaction velocity reached 10.28 m/s at aspect ratio of 1.2. At the same compaction moment, the volume strain was decreased as the aspect ratio increased. Then the relationship between compaction pressure and volume strain was revealed. The aspect ratio range of the optimal compaction effect was 0.6–1.0, and the fluctuation degree of relative density was only 1.03%. The aspect ratio had less effect on the micromorphology distribution in the axial direction of the compacts. The micro hardness value of the upper surface was higher than that of the lower surface, and the edge position was greater than the center position.

磁脉冲压紧（MPC）技术具有接近最终形状，高效率和高密度的优点。本文研究了纵横比对MPC技术压实的铜粉变形特性的影响。具体地，获得了在各种纵横比下的压实体的压实速度，体积应变，微观形态和显微硬度。结果表明，压实速度和体积应变随长径比的增加而增加，然后减小。在1.2的纵横比下，最大压实速度达到10.28 m / s。在相同的压实时刻，体积应变随着长宽比的增加而减小。然后揭示了压实压力与体积应变之间的关系。最佳压实效果的长宽比范围为0.6-1.0，相对密度的波动度仅为1.03％。长径比对压坯轴向微观形态分布的影响较小。上表面的显微硬度值高于下表面的显微硬度值，并且边缘位置大于中心位置。