▎ 摘　　要

Here in this literature, incorporation of graphene in commercially pure aluminum by hot accumulative roll bonding (ARB) is studied. Annealed Al sheets were hot ARB processed up to 6 passes by repetitive graphene coating, stacking, rolling and cutting process respectively. Another set of monolithic Al was also processed with similar processing parameters for comparative study. A good interface between graphene and aluminum was observed under transmission electron microscopy. Interlayer bonding and grain boundary structure were examined by scanning electron microscopy and electron backscattered diffraction mapping respectively. The fraction of high angle grain boundaries not only increases with respect to ARB passes but also with graphene incorporation. Raman mapping was also performed to understand the quality as well as the distribution of graphene. Tensile strength and hardness of processed composite were increased up to 25% and 20% respectively in comparison to monolithic Al which is attributed to graphene reinforcement effect. Thermal conductivity (TC) of annealed Al, 6pass monolithic Al, and 6pass graphene/Al composite was also measured. Due to ARB processing, TC of annealed Al was reduced by similar to 17% but the addition of 0.1 wt % graphene was able to recover the reduced TC. (C) 2019 Elsevier B.V. All rights reserved.