Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University
Metal-Intermetallic Laminate (MIL) composite Ti/Al3Ti, which is a class of laminated material and consists of ductile Ti layers and intermetallic Al3Ti layers, is sintered using both Ti-6Al-4V foils and Al foils. In this paper, the methods of ENF (End-Notch-Flexure) test and MMF(Mixed-Mode-Flexure) test are used to investigate the interlaminar fracture energy of two fracture types (type II and type I + II), the interlaminar fracture behavior and the energy release rate of MIL composite Ti/Al3Ti. The results show that the crack initiation occurred at the interface between the layers, and the deflection occurred in the course of the crack propagation, which led to the crack of Al3Ti layer. Therefore, the cracks finally appeared to propagate at both the interface of composite and the Al3Ti layer. The interlaminar fracture energy release rates GI+II and GII are 46 J/m2 and 1453 J/m2, respectively, which show that type II interlaminar fracture crack requires more energy than that of type I + II.