Abstract
Titanium alloy Ti6Al4V is widely used in aerospace, biomedicine, and marine industries due to its high strength-density ratio and corrosion resistance property. Grinding is used to achieve final surface quality of the component, in which the surface residual stress plays an important role in the fatigue life of the component. This study presents the investigation of surface residual stress in vibration assisted grinding of Ti6Al4V. A finite element model is developed to predict the surface residual stress in both Conventional Grinding (CG) and Vibration Assisted Grinding (VAG). The effect of progressive strain hardening of the workpiece material due to multiple grit passes is considered to analyse the surface residual stress. The model is validated through 1-D and 2-D vibration assisted grinding experiments. The surface residual stress is measured through 2-D X-ray diffraction technique. It is observed that implementing vibration assistance results in increased compressive residual stress due to the indentation effect, which enhances the fatigue life of the component.
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