J. Phys. IV France 10 (2000) Pr9-305-Pr9-310
Dynamic characterization at high temperature of MMCs with discontinuous reinforcementM.H. Miguélez and C. Navarro
Departamento de Ingeniería Mecánica, Escuela Politécnica Superior, Universidad Carlos III de Madrid, 28911 Leganés, Spain
The dynamic behaviour of two commercial metal matrix composites with discontinuous reinforcement (A12618, 20%Al2O3 and A359, 20%CSi) was tested using a Split Hopkinson pressure bar with a furnace coupled to the bars for dynamic compression tests at high temperature. The influence on the dynamic properties of strain rate, temperature (23-400C) and heating time before the test was analysed. The materials were tested in free temper state and after heat treatment, and presented very different behaviour. A decrease in the elastic limit was observed as temperature increased. The elastic limit increased slightly as the strain rate increased.
© EDP Sciences 2000