Abstract
Damage tolerance improvement in discontinuously reinforced aluminum matrix composites has been examined through both extrinsic and intrinsic approaches by researchers. In this study, extrinsic mechanism was considered in the form of architectural modification in laminates comprising two exterior layers of Al6061-5 vol.% SiCp and an interlayer of Al1050. Hot roll bonding was utilized to fabricate laminates since interfacial adhesion of layers was controlled by means of rolling strain. The interfacial strength and fracture resistance of specimens were examined by shear and three-point bending test, respectively. Achievements demonstrated that the quasi-static toughness of laminates tested in crack divider orientation was greater than that of monolithic samples. Also, it was revealed that the initiation, propagation, and total toughness were influenced by interfacial adhesion. In the other words, interfacial bonding played a major role in energy absorption during fracture. Enhancement of the interfacial adhesion by an increment in rolling strain elevated the energy consumed for emergence and growth of debonded area.
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