TENSILE CREEP-BEHAVIOR OF SILICON-CARBIDE PARTICULATE-REINFORCED ALUMINUM COMPOSITE

Tensile creep tests were carried out on 15SiC (vol.pct) particulate re inforced commercial pure aluminum (15%SiCp/Al) composite at 573 and 62 3 K. The steady state creep stage exists at the applied stresses under the condition of tension. The 15%SiCp/Al composite exhibits an appare nt stress exponent of about 13 and an apparent activation energy of 25 3 kJ/mol. The creep data were normalized using a substructure invarian t model with a stress exponent of 8 together with a threshold stress.