▎ 摘　　要

Laminated multi-layer graphene/Cu-Al-Mn composites were prepared via packaged hot roll bonding process for the first time. Microscopic observation shows that the grains in the Cu-Al-Mn layers are remarkably refined. Multi-layer graphene films intermittently disperse at the interfaces between Cu-Al -Mn layers. Some small fragments of multi-layer graphene films are squeezed into the Cu-Al-Mn layer, and around them, due to the formation of in-situ Al2O3 phase and nano-twins, multi-stage and multi-phase structures are formed. Performance tests show that the composites have ultrahigh damping capacity. Within a wide temperature range of 25-300 degrees C, the value of damping plateau is up to 0.1 (about 10 times that of the original Cu-Al-Mn alloy). The composites also have superior tensile mechanical properties. Their tensile strength and elongation are up to 913.3 MPa and 13.4% respectively (2.5 times and 4.1 times that of the original Cu-Al-Mn alloy). Microstructural origins of the excellent comprehensive properties were discussed in detail. (C) 2021 Elsevier Ltd. All rights reserved.