Accumulative roll bonding (ARB) is one of the severe plastic deformation methods of producing ultrafine grained laminated metal composites (LMCs). This paper is focused on LMCs consisting of dissimilar bimetal system of aluminum alloys AA1050/AA6061. One difficulty of roll bonding two dissimilar materials is obtaining of elevated strain at the interface of the composite in order to provide the ultrafine grain structure and superior bonding strength between the stacked layers. Compared to conventional ARB the asymmetric accumulative roll bonding is more appropriate for the production of dissimilar bimetal composites. This paper presents the results of the finite element simulation and comparison of strain behavior during symmetric and asymmetric accumulative roll bonding of AA1050/AA6061 bimetal composites at cryogenic temperature. Influence of rolls speed ratio (5…50 %) and contact friction coefficient (0.1…0.4) on strain distribution through composite thickness, especially on interface between the AA1050 and AA6061 layers, during asymmetric ARB were analysed by FEM in details.Keywords: Finite element method, asymmetric accumulative roll bonding, cryogenic temperature, aluminum, bimetal composite
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