New tool materials with a structural gradient for milling applications

New hardmetals with a structural gradient for milling applications are inve stigated experimentally and numerically on several length scales. On the ma croscale, milling tests are performed and a numerial model for up-milling i s developed. On the mesoscale, the interaction of cracks with the graded su rface zones, especially large soft binder islands are studied. On the micro scale, the influence of shape and volume of such inclusions are investigate d, further on, crack propagation in realistic microstructures is simulated. On the sub-microscale crack propagation and void growth in the ductile bin der are modelled with crystal plasticity.