Material aspects of chip formation in HSC machining

Investigations in the past have shown, that chip formation changes by incre asing cutting speed, because most of the experimental work had been carried out in the original material stage. In contrary to this new machining inve stigations were made on an aluminium alloy at different heat treatment stat es. This investigations confirm that precipitation hardening is the key in changing from continuous to segmented chip formation and not only the cutti ng parameters. By applying this new knowledge, the relationship between chi p formation and cutting forces was examined.