The wear behavior of two types of coated cemented carbide tools has been st
udied when face milling a nickel-based superalloy Inconel 718. PVD-TiN and
CVD-TiCN+Al2O3 tools were used. It was found that the coatings were detache
d after only five seconds of cutting. An attrition type wear mechanism asso
ciated with workpiece material adhesion was observed which eventually led t
o severe chipping, flaking, plastic deformation and cracking. It was noted
that the coatings had no significant effect on tool performance under the c
utting conditions tested.