Metal/intermetallic laminate composites can improve the mechanical properties of intermetallic materials using metal layers. In recent years, titanium aluminide intermetallics have received increasing attention due to their excellent performance properties, such as high melting point, high specific strength and stiffness, and good corrosion resistance. However, the low fracture toughness of Al₃Ti alloys at room temperature has greatly limited their application, and fiber or particle reinforcement has not shown a significant toughening effect. Research into the reinforcing effects of the interface and near-interface zone on the fracture behavior of Al₃Ti is lacking. Ti/Al₃Ti metal/intermetallic laminate composite was synthesized from titanium and aluminum foils using vacuum hot-pressed sintering technology. The microstructure of the prepared material was analyzed by scanning electron microscope and electron backscattered diffraction. Results illustrate that both Ti and Al₃Ti were single-phase and there was a noticeable stress concentration on the interface. To obtain indentation and cracks, loads were applied to different locations of the composite by a microhardness tester. The growth path of the cracks was then observed under microscope, showing that crack propagation was prevented by the interface between the Ti and Al₃Ti layers, and the cracks that propagated parallel to the laminate shifted to the interface. Fracture toughness of the different areas, including Al₃Ti layers, interface, and near-interface zone, were measured by the indentation fracture method. The fracture toughness at and near the interface was 1.7 and 2 times that of the Al₃Ti layers, respectively. Results indicate that crack blunting and crack front convolution by the laminate structure was primarily responsible for increased toughness.

金属/金属间层压复合材料可以改善使用金属层的金属间材料的机械性能。近年来，铝化钛金属间化合物由于其优异的性能，如高熔点，高比强度和刚度以及良好的耐腐蚀性而受到越来越多的关注。然而，Al ₃ Ti合金在室温下的低断裂韧性极大地限制了它们的应用，并且纤维或颗粒增强材料没有显示出显着的增韧效果。缺乏对界面和近界面区对Al ₃ Ti断裂行为的增强作用的研究。钛/铝₃采用真空热压烧结技术，由钛箔和铝箔合成了钛金属/金属间层合复合材料。通过扫描电子显微镜和电子背散射衍射分析了所制备材料的微观结构。结果表明，Ti和Al ₃ Ti均为单相，界面上存在明显的应力集中。为了获得压痕和裂纹，通过显微硬度测试仪将载荷施加到复合材料的不同位置。然后在显微镜下观察裂纹的生长路径，表明Ti和Al ₃之间的界面阻止了裂纹的扩展。Ti层和平行于层压板传播的裂纹转移到界面。通过压痕断裂法测量了包括Al ₃ Ti层，界面和近界面区在内的不同区域的断裂韧性。界面处和界面附近的断裂韧性分别为Al ₃ Ti层的1.7和2倍。结果表明，层压结构的裂纹钝化和裂纹前卷积是增加韧性的主要原因。