Microstructures and Dynamic Compression Properties of a High Reinforcement Content TiB2/Al Composite
A high reinforcement content TiB2/2024Al composite with an average particle size of 8μm was fabricated by squeeze casting technology. The dynamic compression behaviors of the composite under varied strain rates were measured using split Hopkinson pressure bar, and its microstructure and fracture characteristic were examined. Resluts revealed that the composite was dense and homogenerous, and the TiB2-Al interface was clean without interfacial reactants. At high strain rate, the TiB2/Al composite showed insensitive to the strain rate, and both the flow stress and the elastic modulus improved little with an increase of the strain rate. The composite failed macroscopically in shear fracture and in split, which were caused by cracking of large reinforcement particles and interface failures under dynamic load.
Yafang Han et al.
D. Z. Zhu et al., "Microstructures and Dynamic Compression Properties of a High Reinforcement Content TiB2/Al Composite", Materials Science Forum, Vols. 546-549, pp. 639-642, 2007