Study on the formability of SiCf/Ti-6Al-4V composites by fiber laying parameters and laser process parameters

As an important structural material for hypersonic aircraft and high thrust-to-weight ratio engines, continuous fiber-reinforced titanium matrix composites (TMCs) has high specific strength, high specific stiffness, corrosion, wear resistance and high temperature creep resistance. TMCs were directly fabricated using an additive manufacturing method that did not require a mold. The degree of fiber preservation during the preparation process and the molding quality have a signicant influence on the properties of the composite material. This paper firstly studies the effect of filament laying parameters on the forming results. This was followed by an investigation of the impact of the process parameters on the forming results using orthogonal experiments with interactions and finding out the process parameters for the best molding quality. SEM and metallographic results show that the microstructure of the composites formed under different parameters showed different amounts of martensite, columnar crystals, and equiaxed crystals. TiC was the main component of the interfacial reaction layer.