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A commercial AA2618 alloy was treated through melt spinning at rotating speeds of 20 and 40{m·s+{-1}}. The as-melt spun ribbons were characterized by a combination of optical microscopy (OPM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The microstructural evolution of the ribbons in a continuous heating process was investigated, and the microhardness was also measured under different conditions. It was found that Al-%x%FeNi is prone to precipitate in AA2618 alloy due to the minimal solubility of iron and nickel. Fine Al-%x%FeNi particles appeared along the grain boundaries at the chilling sides of as-melt spun ribbons, and at both the grain boundaries and in the interior of grains at the free sides. On continuous heating Al-%x%FeNi precipitated steadily and uniformly throughout the matrix until melting. The microhardness of as-melt spun ribbons decreased significantly from the chilling surfaces to free surfaces. Precipitation of Al-%x%FeNi lowered the hardness of the alloy.
A commercial AA2618 alloy was treated through melt spinning at rotating speeds of 20 and 40 m s + {-1 } }. The as-melt spun ribbons were characterized by a combination of optical microscopy (OPM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The microstructural evolution of the ribbons in a continuous heating process was investigated, and the microhardness was also measured under different conditions . It was found that Al - % x % FeNi is prone to precipitate in AA2618 alloy due to the minimal solubility of iron and nickel. Fine Al - % x % FeNi particles Similar the grain boundaries at the chilling sides of as-melt spun ribbons, and at both grain boundaries and in the interior of grains at the free sides. On continuous heating Al - % x % FeNi precipitated steadily and uniformly The microhardness of as-melt spun ribbons decreased significantly from the chilling surfaces to free surfaces. Precipitation of Al - % x % FeNi lowered the hardness of the alloy.