Abstract
Abstract Titanium alloy is extremely difficult to machine due to the rapid tool wear. The influence of tool wear on surface topography and chip formation, during micro-milling of Ti-6Al-4V, using the Ti(C7N3)-based cermet micro-mill is investigated. The non-uniform surface quality was generated by alternative material removal mechanisms, at the cross-section of micro-slot. Metal debris and plastic side flow were more severe as the tool wear progressed, while the improved surface quality, at the up-milling side, could be obtained relative to the down-milling side. The micro-chips serration was formed, while the transition from the α-Ti to the β-Ti in micro-chips occurred as the tool wear progressed, due to the high strain and strain rate.
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