The dynamic mechanical response of SiC participate reinforced 2024 aluminum matrix composites

摘要

The compression properties of the aluminum alloy 2024 metal matrix composites reinforced with 50 vol.% SiC particles were investigated using Instron testing machine and split Hopkinson pressure bar (SHPB) in this paper. The compression stress-strain curves were obtained at the strain rates ranging from 1 × 10~(-3) to 2.5 × 10~3/s. The fracture surfaces were characterized by scanning electron microscopy. The results showed that SiCp/2024 Al composites exhibited high strain-rate sensitivity. The strength of composites tended to increase-decrease with increasing of strain rates. The effect of the strain rate on elongation was also discussed.