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Microstructure and mechanical properties of Al/Cu/Mg laminated composite sheets produced by the ARB proces

International Journal of Minerals,Metallurgy and Materials 2018年第5期25卷 564-572页

作者： davood rahmatabadi Moslem Tayyebi Ramin Hashemi Ghader Faraji School of Mechanical Engineering Iran University of Science and Technology Department of Materials Engineering Sahand University of Technology School of Mechanical Engineering College of EngineeringUniversity of Tehran

In the present study, an Al/Cu/Mg multi-layered composite was produced by accumulative roll bonding(ARB) through seven passes, and its microstructure and mechanical properties were evaluated. The microstructure investigations show that plastic instability occurred in both the copper and magnesium reinforcements in the primary sandwich. In addition, a composite with a perfectly uniform distribution of copper and magnesium reinforcing layers was produced during the last pass. By increasing the number of ARB cycles, the microhardness of the layers including aluminum, copper, and magnesium was significantly increased. The ultimate tensile strength of the sandwich was enhanced continually and reached a maximum value of 355.5 MPa. This strength value was about 3.2, 2, and 2.1 times higher than the initial strength values for the aluminum, copper, and magnesium sheets, respectively. Investigation of tensile fracture surfaces during the ARB process indicated that the fracture mechanism changed to shear ductile at the seventh pass.

关键词： multi-layered composite Al/Cu/Mg accumulative roll bonding fractography mechanical properties microstructure

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