This paper extends the photoelasticity studies reported in Part 1 of this paper to the plastic regions associated with chip formation during orthogonal cutting. These regions include the deformation zone, the tool-chip interface and the chip itself. Problems connected with quantitative studies involving photoplasticity techniques are discussed. Qualitative interpretation of the photoplasticity observations carried out under dynamic cutting conditions are offered. Some comments regarding the role of the residual stresses in the chip in influencing the types of chips formed during cutting are made.

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