Investigation of mechanical properties, fracturgeraphi and microstructure of layered Al/Cu composite produced by cold roll bonding

In the present study, Al/Cu layered composite was produced through CRB method at room temperature, without lubricant and via using laboratory rolling machine by applying 60% reduction in thickness. Also mechanical properties, fracturgraphi and microstructure investigated through uniaxial tensile test, microharsness, scanning electron and optiv microscope. Results of carried out tests, showed the value of tensile strength and microhardness for Al/Cu layered composite compared to initial Al 5052 and pure Cu, increased that the main cause of this increase is applied high strain and cold working. Value of tensile strength for Al/Cu layered composite received 415 MPa that compared to initial Al 5052 and pure Cu 48% and 140% enhanced, respectively. Also microhardness calculated for each layers of composite individually and for Al and Cu increased 14% and 83% respectively. Results of SEM demonstrated that ductile fracture mechanism govern for Al/Cu composite such as initial samples, but the difference is that dimples for composite layers shallower and smaller compared to initial samples.