HOT FORMING RELATED PROPERTIES OF Al 6061/Al_2O_3 AND Al 2618/Al_2O_3 COMPOSITES

摘要

The hot tensile deformation behaviour of the 6061/Al_2O_3, 2618/Al_2O_3 and 2618/SiC particulate reinforced composites was investigated over a range of temperatures and strain rates. A unreinforced 6061 monolithic alloy was also considered for comparison purposes. The composite materials exhibited a similar hot working behaviour with anticipated onset of matrix restoration mechanisms as a function of temperature with respect to the unreinforced alloy. Microstructrral analyses on broken specimens allowed to observe reinforcement damage and matrix evolution during hot deformation.