Tool wear is a problem when machining Inconel 718.
Inconel 718 is known for being a difficult to cut material,
this is due to its high strength at high temperatures, low
thermal conductivity and high work hardening. This
causes cutting tools to experience rapid wear. It is
important to understand the wear mechanisms and
analyze the causes of wear. The study was done at cutting
speeds of 80, 100 and 120m/min and radial depth of cut
of 5, 7.5, 10 and 20mm in dry condition. The tool wear and
tool wear mechanisms were observed using the tool
maker’s microscope and scanning electron microscope.
The tool wear was found to be more rapid at larger radial
depth of cuts at all three cutting speeds. It was also found
that the main wear mechanisms present were abrasion,
adhesion and attrition.