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A new machining system for hard and brittle materials which makes it possible to achieve ductile-regime machining processes was developed. The machine is capable of cutting, grinding, or polishing brittle materials such as ceramics and glasses in ductile-regime. As a key component in building the system, giant magnetostrictive alloys with large output energy and outstanding elongation are employed to comprise an ultra-precision actuator. The actuator can be used not only as a fine positioning device but also as a high frequency vibration actuator. In this article, the results of the device viewed as a high accuracy positioning device in grinding processes are presented. Various kinds of hard and brittle materials were subjected to experiments whose results indicate that the newly developed machine is capable of realizing ductile-regime processes.

Development of Multi-purpose Ductile-regime Machining System for Ceramics and Glasses.