Influence of Spinning Deformation on Microstructures and Tensile Properties of B4C Particulate Reinforced Aluminium Matrix Composite Tube

The B4C particles reinforced aluminium matrix composite tube with different deformation was fabricated by spark plasma sintering (SPS) followed by asynchronous offset spinning. The effects of deformation on microstructure and mechanical properties of the composite tube were investigated. Results show that distribution of the B4C particles changes from net-like to relatively homogeneous in the aluminium matrix with the spun deformation increasing. Metallurgical bonding forms on the interface between B4C and aluminium; the local high temperature of the interface between particles caused by the top discharge between particles during SPS processing promotes the interface bonding. The interface mainly consists of AlB2 and Al3BC phase. With the deformation increasing, the aluminium grain and B4C particle are decreased in size. However, the large sized B4C particle fracture weakens the function of the fine-grain strengthening and particles strengthening for the tensile strength. © 2019, Science Press. All right reserved.