Texture Evolution by Simulated Accumulative Roll Bonding process

Mechanical Engineering

The accumulative roll bonding technique is one of the well-known severe plastic deformation process to achieve sheet material with nanostructures and high strength. The properties of such sheets vary a lot from those of usually rolled sheets. It is hence popular to have a simulation construction that can perfectly calculate the material properties, as well as the developing texture and anisotropy through the process. In this paper, we put forward such a framework for multiple pass rolling using explicit finite elements and implanting the visco-plastic self-consistent (VPSC) polycrystalline texture model for the material response. To smooth the progress of multiple pass rolling, we plan a new solution mapping method which transfers the material properties from the plastically deformed finite element mesh to a new property of the material. as well as, a two-level parallelization plan with the decomposition of the finite element domain by means of message passing interface (MPI) and thread based parallelization of the material retort using open MP to make certain compact simulation times. The analytical capabilities of the planned framework are established by simulating the accumulative roll bonding of aluminum alloy AA5750 sheets. The simulations validate the working of the solution mapping scheme, and clearly show the development of a through- thickness gradient of texture and anisotropy in the roll-bonded sheet after two passes.

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