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Structural Characterization and Properties of Al/Fe Multi-Layer Composites Produced by Hot Pressing

Kowalski Wojciech, Paul Henryk, Mania Izabela, Petrzak Paweł, Czaja Paweł, Chulist Robert, Góral Anna, Szlezynger Maciej

Archives of Metallurgy and Materials

2023

Vol. 68, iss. 1

137--144

This study aimed to develop Fe/Al multilayered metallic/intermetallic composites produced by hot pressing under an air atmosphere. Analyses were carried out on the composite plates made up of alternatively situated sheets of AA1050 aluminum alloy and DN04 low carbon steel, which were annealed at 903 K for 2, 5, and 10 h. Annealing was performed to obtain reaction layers of distinct thickness. The samples were examined using X-Ray diffraction and scanning and transmission electron microscope equipped with an energy-dispersive X-Ray spectrometer. To correlate the structural changes with mechanical properties, microhardness measurements in near-the-interface layers were performed. All the reaction layers grew with parabolic kinetics with η-Al5Fe2 intermetallic phase as the dominant component. After annealing for 5 and 10 hours, a thin sublayer of θ-Al13Fe4 phase was also detected.