Abstract
In the present research, fracture toughness (FT), Forming limit diagram (FLDs), electrical, magnetic, and mechanical properties of Al base composites which are reinforced with Fe2O3 particles have been studied experimentally. Al/ Fe2O3 composite strips have been fabricated via accumulative roll bonding (ARB) process. The ARB process was continued up to 10 cycles at 250°C. The magnetic composite samples have been produced with different values of 0, 5%, and 10 Wt.% of Fe2O3 particles. Based on the results obtained, the bonding quality of composite layers was improved at higher number of ARB cycles. SEM fracture morphology of samples showed that the shear ductile fracture mode was achieved at higher cycles. Elongated dimples were changed to shallow dimples in comparison with the annealed Al sample. FLDs dropped at low ARB cycles and then improved by increasing the number of cycles up to cycle #10. FT values had the same behavior until it reached to the value of 32.3 MPa after the 10th cycle. Thee bonding strength improved by 94 N after 10 ARB cycles. Moreover, the resistivity and conductivity of samples reached to 58.3 (nΩ.m) and (nΩ.m)−1 after the 10th cycle, respectively.
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