In this research, metallic lightweight ductile composites made from Ti and Al alloys are tested against dynamic impact. 3D printed Ti6Al4V cellular lattice structures with different strut diameters and cell sizes were sintered inside an AlSi10Mg powder during the low-pressure low-temperature process and investigated experimentally and analytically. Four novelties of the present study are: (1) Ti6Al4V-AlSi10Mg composite with local or overall impact reinforcement, (2) combination of selective laser melting (SLM) and spark plasma sintering (SPS) techniques to produce hybrid composites, (3) multiple impact test method with in-situ monitoring of sample acceleration, (4) coupling of SolidWorks and ANSYS finite element software to model and simulate penetration depth, stress distribution, deformation of uniform and gradient architecture lattices due to projectile impact. The volume fraction of the Ti6Al4V lattice (influenced by cell size and strut diameter) has a pivotal role in impact resistance. The results show that composites with smaller cell size with thinner strut diameter has similar performance to those with larger cell size with thicker struts, due to equal volume fraction. The good performance of the thickest strut possible per unit cell demonstrates the pivotal role and direct relationship of the volume fraction of the Ti6Al4V lattice for the impact resistance. In addition, the simulation results show that a uniform lattice structure with a higher volume fraction leads to a shallow penetration, while a gradient lattice hinders shape distortion.

在这项研究中，对由Ti和Al合金制成的轻质金属延展性复合材料进行了动态冲击测试。在低压低温过程中，将具有不同支杆直径和孔尺寸的3D打印Ti6Al4V细胞晶格结构烧结在AlSi10Mg粉末内部，并进行了实验和分析。本研究的四个新颖之处是：（1）具有局部或整体冲击增强作用的Ti6Al4V-AlSi10Mg复合材料；（2）选择性激光熔融（SLM）和火花等离子体烧结（SPS）技术的组合以生产混合复合材料；（3）多种现场监测样品加速度的冲击试验方法，（4）SolidWorks和ANSYS的耦合有限元软件，用于建模和模拟由于弹丸撞击而导致的穿透深度，应力分布，均匀和渐变建筑格架的变形。Ti6Al4V晶格的体积分数（受晶胞尺寸和支杆直径影响）在抗冲击性方面起着关键作用。结果显示，由于体积分数相等，具有较小孔尺寸和较小支撑直径的复合材料与具有较大孔尺寸和较厚支撑材料的复合材料具有相似的性能。每个晶胞尽可能厚的支撑杆的良好性能证明了Ti6Al4V晶格的体积分数对于抗冲击性的关键作用和直接关系。此外，仿真结果表明，一个统一的体积分数较高的晶格结构会导致较浅的渗透，而渐变晶格会阻止形状变形。