Structural evolution and interdiffusion in Al/Cu nanocomposites produced by a novel manufacturing process
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Aluminum-copper multilayered composites were synthesized at ambient temperature from a layered array of individual elemental aluminum and copper foils by up to 10 cycles of accumulative roll bonding and folding (ARBF). Well-bonded sheet materials were successfully obtained with an initial cycle reduction of 50%. The microstructural development during the ARBF process was investigated by optical microscopy and scanning electron microscopy. After 10 cycles of ARBF, the crystallite sizes of Al and Cu, calculated by the Rietveld method, were 70 nm and 50 nm, respectively. WDS analysis revealed that by increasing the number of ARBF cycles, diffusion of Cu atoms was increased.
Key wordsmetal matrix composites diffusion bonding scanning electron microscopy
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