Abstract
AbstractCeramic cutting tools have been previously tested according to their wear. During the present research turning tests have been carried out with failure as tool life criteria. Relationships between statistical distribution of cutting time until failure during machining tests and flexural strength during bending tests, have been established, according to a same probability of presence of critical micro-structural flaws into the stressed volume of ceramic material. A new concept of efficiency of ceramic tools is proposed: the safe tool life which means tool life with low probability of catastrophic failure of tool.
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