Electromagnetic and Fracture Properties of AA1100/Fe2O3 Composite Strips Fabricated via Arb Process

Abstract

In this study, forming limit diagrams (FLDs), fracture toughness (FT), and mechanical, magnetic, and electro-physical properties of Al/Fe₂O₃ composites have been investigated experimentally. Accumulative roll bonding (ARB) was used to manufacture composite samples. Then, Al/Fe₂O₃ composites were produced at 300°C for up to eight ARB passes. Also, magnetic composites have been fabricated with 0, 5, and 10 wt.% of Fe₂O₃ particles. The interlayer bonding quality was improved at higher passes. By studying the SEM rapture morphology, it was shown that the rapture mode changed to shear ductile for samples with more passes. For composite samples fabricated at higher passes and compared to annealed samples, elongated dimples were turned into shallow ones. FLDs area as the main forming criterion dropped severely after passing one and then began to improve at higher passes. The fracture test results showed that after the 8^th pass, the value of FT gradually enhanced to the maximum value of 34.3 MPa ⋅ m^1/2. It is also shown that the distribution of Fe₂O₃ particles in the aluminum matrix becomes more and more homogeneous with an increase in the number of rolling cycles, significantly affecting the uniformity of the magnetic capacity. The hysteresis curves improve after more passes due to the higher Fe₂O₃ content, indicating increased coercive force H_c and residual magnetization M_R.