Abstract
Friction stir processing of a ternary immiscible alloy was investigated as a pathway to thermally stable nanostructured alloys. The processed alloy was characterized using x-ray diffraction (XRD), scanning electron microscopy (SEM), nano-indentation, and thermal stability analysis. Both XRD and high-magnification SEM confirmed the formation of solid solution at the shear edge of the friction stir layer. Microstructural inhomogeneity was observed in the processed region that resulted in hardness variation. Upon annealing treatment, a significant improvement in hardness was observed at 200°C that was due to the formation of nano-precipitates. Remarkably, the Cu-Ag-Nb immiscible system displayed exceptional thermal stability up to 500°C.
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We would like to thank the Center for Advanced Research and Technology (CART) for the microscopy facilities.
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Komarasamy, M., Mishra, R.S., Mukherjee, S. et al. Friction Stir-Processed Thermally Stable Immiscible Nanostructured Alloys. JOM 67, 2820–2827 (2015). https://doi.org/10.1007/s11837-015-1641-z
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DOI: https://doi.org/10.1007/s11837-015-1641-z