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Naval Surface Warfare Center, Crane Division - Figure 1: SEM image of chip (free surface of chip) produced by cutting Ta workpiece that is coated with an ink medium only along part of its cutting length. The initial part of the cutting length is uncoated. The non-inked region shows a very thick chip (~34-fold thickening), with mushroom-like free- surface morphology, formed by sinuous flow and folding. In contrast, the chip from the inked-region is quite thin (~5-fold thickening) and forms by seg-mentation flow. Cutting parameters: α = 10◦, h0 = 50 μm, V0 = 2 mm/s.


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