Fe-Cr-Ni porous preform reinforced aluminium composites were produced by squeeze casting.After T6 heat treatment

tensile test was carried out to obtain the mechanical properties of the composites at room temperature and at 350 ℃.Fracture analysis was conducted by SEM and EDS

and the results reveal that

at room temperature

the fracture mainly occurrs in aluminium matrix

while at 350℃

the fracture is formed at the interface of reinforced particle and aluminium matrix.The compression performance of the composites were tested by using the Gleeble 3500thermo-mechanical simulation machine at room temperature with strain rates of 0.001

0.1and 10s-1.And the results indicate that

the yield stress is increased with the increase of strain rate.However

the peak stress nearly keeps constant at the test strains rates.During the compression experiment process

all the samples were cracked.The fracture induced by shearing stress has an angle of 45°with the axial direction of the sample.