Chip formation in machining Ti6AI4V at extremely high cutting speeds

The chip formation of Ti6Al4V is described in the cutting speed range between 300 m/min and 6000 m/min. The specific cutting forces are measured. A new quick stop method is introduced which allows rapid decelaration from 2500 m/min in a very short distance, providing new information on the formation of segmented chips. The conditions at the onset of segmentation are described. A change in the structure of segmentation is observed with a cutting speed exceeding 2000 m/min. However, no change in specific cutting energy coincides with this change in structure.