Progress on Discontinuously Reinforced Titanium Matrix Composites

Discontinuously reinforced titanium matrix composites(DRTMCs) exhibited extensive application due to their superior characteristics of low density,high temperature durability,high strength and good deformability. Recently,researchers pay more attention to DRTMCs again,because of urgently needs of new ultra-high-speed aircraft and next-generation high thrust weight ratio aeroengine.Recent research progress of fabrication methods,selection of reinforcement and matrix,reinforcement distribution,subsequent deformation and heat treatment and mechanical properties were reviewed. In addition,the problems in the present research are also pointed out and then the further research directions in future are proposed. In order to obtain further development,a series of DRTMCs with high modulus,high abrasion resistance,high strength and toughness and high temperature durability should be prepared respectively. Moreover,gradient surface or coating with higher abrasion resistance or higher oxidation resistance should be designed and fabricated in order to enhance their service lifetime. Fabricating tiny components,intricate components and controlling the reinforcement distribution by 3D printing technology should be involved in future work. The components with large size,intricate shape and different materials of DRTMCs can be obtained by proper welding technologies.