The properties of SiCp/Al composites

such as high specific strength/specific stiffness and good toughness

make it great application potential in engineering. Aiming at the cutting process of 25 vol% SiCp/Al composites

a two-dimensional micro-finite element model is established

and the removal mechanism is analyzed from the aspects of particle deformation

chip formation and surface quality. The results indicated that there is a good consistency between the simulated analysis and the experimental. Particle deformation behavior is influenced by tool-particle relative position

mainly manifested in the forms of fracture

debonding

and pressing into the matrix. The crack propagation caused by interfacial debonding and matrix plastic fracture is the main reason for generating the segmented serrated chips. Pits

scratches

matrix tearing

and particle fracture are the main forms of machined surface/subsurface damage. The results reveal the removal mechanism of SiCp/Al composites from a microscopic perspective

providing the useful reference to improve their machinability.