Magnetic Control of Phase Evolution in Titanium-Based Alloys Synthesized by Ball Milling

Abstract

Nanostructured TiAlV alloys were synthesized from pure titanium, aluminum, and vanadium powders using the mechanical alloying technique in a high-energy planetary ball mill. The magnetic behavior, morphology, and microstructural properties were examined using a Vibrating Sample Magnetometer (VSM), Scanning Electron Microscope (SEM), and X-ray Diffraction (XRD), respectively. The crystallite size decreased from 48.73 nm to 9.38 nm, while lattice strain increased from 0.15% to about 0.81% after 60 hours of grinding. X-ray diffraction confirmed the formation of new phases during the grinding process. Magnetic non-destructive testing revealed that the nanocrystalline TiAlV alloy contains magnetic particles whose properties vary over time periods, attributed to the reduction in crystallite size of these particles due to collisions with the milling balls. NDT by magnetic measurement confirmed that the state of the nanocrystalline alloy can be controlled using a vibrating sample magnetometer.