For the first time in this study, the accumulative press bonding method was used to fabricate layer composites, including ceramic powder and metallic layers, and the spring-back as a functional plasticity test experimentally investigated. Al/Cu and Al/Cu/Al2O3 composites were successfully manufactured in five accumulative press bonding cycles, and in addition to spring-back evaluation, mechanical properties and plastic instability were investigated. The results showed that by the end of the third cycle, both composites were fully layered structure. However, in the fifth cycle in the Al/Cu/Al2O3 composite, plastic instability intensified and necking and fracture at all Cu layers observed due to the presence of particles in the interface and further differences in mechanical properties. As the number of accumulative press bonding cycles increases, the number of Al/Cu interfaces, which are the places where the reinforcement particles are dispersed, increases, thereby significantly improving the particle distribution and mechanical properties. The mechanical properties were improved by increasing the applied strain to the two composites, mainly due to the mechanisms underlying the severe plastic deformation processes, including cold working and microstructure improvement. The mechanical properties of the composite containing reinforcing particles improved the tensile strength and microhardness of both layers in all accumulative press bonding cycles, although the amount of elongation decreased slightly. The maximum tensile strength values of the two composites were obtained at the end of the fifth cycle, which improved the tensile strength for Al/Cu and Al/Cu/Al2O3 by about 2.65 and 2.42 times higher than unprocessed Al matrix, respectively. Experimental results of the spring-back evaluation showed that the composite with reinforcement powder due to the higher Young’s modulus had lower spring-back value. The amount of spring-back in both composites decreased with almost the same rate as the applied strain increased.

中文翻译：

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通过 L 模弯曲工艺对累积压接技术生产的多层板进行回弹现象的实验研究

在这项研究中，首次使用累积压接方法制造层状复合材料，包括陶瓷粉末和金属层，并通过实验研究回弹作为功能塑性测试。Al/Cu 和 Al/Cu/Al2O3 复合材料在五个累积压接循环中成功制造，除了回弹评估外，还研究了机械性能和塑性不稳定性。结果表明，到第三个循环结束时，两种复合材料均已完全分层结构。然而，在 Al/Cu/Al2O3 复合材料的第五次循环中，由于界面中颗粒的存在和机械性能的进一步差异，在所有 Cu 层处观察到塑性不稳定性加剧和颈缩和断裂。随着累计压接次数的增加，Al/Cu界面是增强颗粒分散的地方，数量增加，从而显着改善颗粒分布和机械性能。通过增加施加在两种复合材料上的应变来改善机械性能，这主要是由于严重塑性变形过程的机制，包括冷加工和微观结构改进。含有增强颗粒的复合材料的机械性能在所有累积压接循环中提高了两层的拉伸强度和显微硬度，尽管伸长率略有下降。两种复合材料的最大拉伸强度值在第五次循环结束时获得，这使 Al/Cu 和 Al/Cu/Al2O3 的拉伸强度提高了约 2.65 和 2。分别比未加工的铝基体高 42 倍。回弹评估的实验结果表明，由于杨氏模量较高，具有增强粉末的复合材料具有较低的回弹值。随着外加应变的增加，两种复合材料的回弹量几乎以相同的速率下降。