Magnetic methods for phase control in titanium-base alloy synthesized by ball milling

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Abstract The nanocrystalline TiAlV alloys have been synthesized from pure titanium, aluminum and vanadium powders by mechanical alloying technique within a high energy planetary ball-mill. Magnetic behavior, Morphology and micro-structural properties were examined by a Vibrating sample magnetometer (VSM), Scanning Electron Microscope (SEM), and X-ray diffraction (XRD), respectively. Crystallite size reduced from 48.73nm to 9.38 nm and lattice strain increased from 0.15% to about 0.81% for 60 hours of grinding. X-ray diffraction testing confirms the apparition of new phases during grinding time. The Magnetic non-destructive testing showed that the nanocrystalline TiAlV contain a magnetic particle which is different from one period to another period, the change of magnetic properties is due by the reduction in crystallite size of magnetic particle which is due to the collision between the balls and the magnetic particles of the powder. The NDT by magnetic measurement confirms that we can control the state of the nanocrystalline alloy using the vibrating magnetometer samples.

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