Abstract
This paper describes the machinability evaluated by mechanical strength of workpiece when wire electrical discharge machining, cutting, grinding and polishing of titanium aluminide intermetallic compounds. The results obtained from this study are as follows : Surface defects and edge breakouts are formed along the layer direction of lamellar structure. Bending tests whose specimen are machined by the four methods are conducted. Grinding and polishing specimens have superior strength to cutting and wire electrical discharge machining specimens. In the case of lower strength specimens, the breakouts or crackes are observed at edge. It is proved that the strengths are related to formation mechanisms of surface and edge defects correlated with machining method.
