Paper Title
Role of SiC Particulates on Relative Toughness Enhancement of Aluminum Matrix Composite Laminates

Abstract
Lamination has been introduced to enhance fracture resistance of both aluminum alloys and their composites. In this study, three types of laminates, one unreinforced layered structure and two others containing DRA layers were fabricated via roll bonding. Al6061, Al6061�5 vol.%SiCp and Al6061�15 vol% SiCp composites were considered as exterior layers and an Al1050 used as an interlayer. Toughness behavior of laminates was examined by three-point bending test in crack-divider orientation, which compared with monolithic Al6061 and composites. Based on obtained results, both plastic deformation of Al1050 and delamination aretoughening mechanisms which rely on the volume fraction of SiC particulate.The maximum relative toughness values observed in Al6061-5 vol.% SiC/Al1050/Al6061-5 vol.% SiC, in which the deformability of ductile layer and debonding interlayer have superior contribution on fracture resistance compared with other layered structures. Keywords� Laminate, Aluminum matrix composites, Fracture, Delamination, Toughness.