Duan Hongqiang, Li Xuexia, Zhang Hongmei, Cheng Xingwang, Mu Xiaonan, Zheng Kefan
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.
Tangshan Research Institute, Beijing Institute of Technology, Tangshan 063000, China.
Materials (Basel). 2024 Nov 15;17(22):5589. doi: 10.3390/ma17225589.
Ti matrix composites (TMCs) are promising structural materials that meet the increasing demands for light weight the automobile and aircraft industries. However, the room temperature brittleness in the traditionally homogeneous reinforcement distribution of TMCs limits their application in high-strain-rate impact environments. In the present study, novel bilayer TMCs with hierarchical microstructures were designed by the laminated combination of graphene nanoplatelet (GNPs) reinforced TC4 (Ti-6Al-4V) composites (GNPs/TC4) and a monolithic TC4. Meanwhile, the configuration of the microstructure, impact performance V, and deformation modes of the bilayered TC4-(GNPs/TC4) plate was investigated. The plates were fabricated via field-assisted sintering technology (FAST). It turned out that the TC4-(GNPs/TC4) plate with a 7.5 mm thickness against a 7.62 mm projectile exhibited greater impact performance (V~825 m/s) compared to the TC4 and GNPs/TC4 single-layer plates. The plate failure modes were dependent on the microstructure while the failure behaviors seemed to be influenced by the hierarchical configuration. This work provided a new strategy for utilizing TMCs in the field of high-strain-rate impact environments.
钛基复合材料（TMCs）是一种很有前途的结构材料，能够满足汽车和航空工业对轻量化日益增长的需求。然而，传统上TMCs均匀增强分布的室温脆性限制了它们在高应变率冲击环境中的应用。在本研究中，通过将石墨烯纳米片（GNPs）增强TC4（Ti-6Al-4V）复合材料（GNPs/TC4）与整体式TC4进行层压组合，设计出了具有分级微观结构的新型双层TMCs。同时，研究了双层TC4-(GNPs/TC4)板的微观结构构型、冲击性能V和变形模式。这些板材是通过场辅助烧结技术（FAST）制造的。结果表明，与TC4和GNPs/TC4单层板相比，厚度为7.5 mm的TC4-(GNPs/TC4)板在抵御7.62 mm射弹时表现出更高的冲击性能（V~825 m/s）。板材的失效模式取决于微观结构，而失效行为似乎受分级构型的影响。这项工作为在高应变率冲击环境领域利用TMCs提供了一种新策略。
