Porous TC4 alloy scaffolds with curved struts were fabricated by selective laser melting (SLM), and the compression deformation behavior of the TC4 alloy scaffolds was studied. When the porous scaffold is compressed along the direction of the building, the stress of the porous scaffold first increases sharply with the increase in the strain, then decreases rapidly and finally shows a stepped increasing trend. Combined with the finite element method and uniaxial compression experiments, the shear position of porous scaffold takes precedence over other parts, and the fracture mainly occurs on the strut near the joint of the porous scaffold. The fracture surface analysis shows that the joint is a ductile fracture, and there is a shallow “dimple” pattern of shear or tear type on the fracture surface, while the fracture morphology of the strut near the joint of porous TC4 alloy scaffold is relatively smooth, which is a typical brittle fracture. The mixed fracture mode is caused by the more concentrated stress at the strut than the joint and the hexagonal close-packed (hcp) fine martensite α′ formed by the SLM.

通过选择性激光熔化（SLM）制备了具有弯曲支柱的多孔TC4合金支架，并研究了TC4合金支架的压缩变形行为。当多孔支架沿建筑物的方向被压缩时，多孔支架的应力随着应变的增加首先急剧增加，然后迅速减小，最后呈现出逐步增加的趋势。结合有限元法和单轴压缩实验，多孔支架的剪切位置优先于其他部位，断裂主要发生在多孔支架接缝附近的支杆上。断裂面分析表明，该接头是韧性断裂，并且在断裂面上存在浅的剪切或撕裂型“凹痕”型，多孔TC4合金脚手架接头附近支杆的断裂形态较为光滑，是典型的脆性断裂。混合断裂模式是由于支撑处的应力集中于接缝和六方密堆积（hcp）细马氏体而引起的由SLM形成的α '。