Properties of TiCNi3Al composites and structural optimization of TiCNi3Al functionally gradient materials

The thermomechanical properties of TiCNi3Al composites with various TiC:Ni3Al ratios were measured. The relationship between the properties and the material microstructures was discussed. By using an axisymmetric finite element method, the fabricated thermal stress in a disc-shaped TiCNi3Al functionally gradient material (FGM) was calculated. According to a comprehensive examination of the relationship between the maximum thermal stress and the FGM composition, the stress at the FGM interlayers and the stress state at the pure TiC side, an optimum composition of the FGM was obtained.