Al6022/Al50231 Al6022 clad sheets were fabricated by roll bonding at ambient temperature and the mechanical properties of the annealed sheets were investigated. The bonding strength of the sheets increased with increasing thickness reduction rate of r...
Al6022/Al50231 Al6022 clad sheets were fabricated by roll bonding at ambient temperature and the mechanical properties of the annealed sheets were investigated. The bonding strength of the sheets increased with increasing thickness reduction rate of roll bonding. No defects like crack or void are observed at the bonded interface after roll bonding at thickness reduction rate above 50%. After annealing at 480℃ for 1 min., the sheets have a well bonded interface without void and 2<SUP>nd</SUP> phase and the microstructure of the sheets consisted of fully recrystallized grains. Stress-strain curves show same strain hardening characteristics with core Al5023 alloy sheets. Meanwhile the elongation of the sheets was higher than that of commercial Al6022 or Al5023 alloy sheet. Especially, the local elongation of the sheets increased about 5~6% compare to the Al5023 alloy sheet. The sheet showed very low tensile anisotropy due to different deformation characteristics of each layer in clad sheets.