Ws. Blackley et Ro. Scattergood, CHIP TOPOGRAPHY FOR DUCTILE-REGIME MACHINING OF GERMANIUM, Journal of engineering for industry, 116(2), 1994, pp. 263-266
Ductile-regime response during the diamond turning of brittle germaniu
m crystals is evident from the damage-free surfaces obtained. The natu
re of the ductile-regime processes cannot be determined by examination
of the final machined surface itself. Machining chips were characteri
zed using scanning electron microscopy. The chip topography provides i
nsight into the ductile-to-brittle transition that occurs along the to
ol nose. A detailed examination of the chips provides an independent e
stimate of the critical cutting depth for the transition.