Hot compression deformation behavior of nano SiC particles reinforced AZ91 composites fabricated via friction stirring at 200

300

400℃and 0.005

0.1 s-1 were carried out using Gleeble-3500 simulator.Microstructure and flow stress of the composites reveal that the stress-strain curves of the composites with uniform and fine microstructure exhibit an obvious characteristics of dynamic recrystallization

and the flow stress of the composites is increased with the decrease of deformation temperature and the increase of strain rate

however the peak flow stress and corresponding peak strain of the composites are lower than those of the unreinforced AZ91 deformed at the same condition

indicating that the composites have a better hot deformation behovior.