Using Digital Image Correlation (DIC) to track material
deformation. The colored pattern in the movie, which deforms
as the metal deforms, was generated by the DIC software to
help the viewer visualize cumulative strain. Inconel 718
workpiece, 55 m/min surface speed. Visible light movie is
125 000 frames per second. Field of view is about 0.8 mm
wide. Unfortunately, the shear zone is so thin that the
strain measured there is not as accurate as desired. There
are other possible techniques currently under investigation,
such as monitoring the polarization state of emitted thermal
spectrum light emitted by the shear zone. More information
is available in the published paper "Preliminary
Investigation of Polarization Effects During Metal Cutting".
