This paper proposes machining under high hydrostatic pressure as a new damage-free machining method for hard-brittle materials. Experiments for this study utilized a specially designed scratching test device, and the pin-on-disc scratching tests were conducted with three (3) hard-brittle materials (i.e., silicon, glass, and quartz) under pressure of 400 MPa and zero MPa. Traces of scratches on these specimens were examined with microscopes to evaluate the effects of hydrostatic pressure on machining defects. The results of the experiments show that hydrostatic pressure is efficient in minimizing machining defects and optimizing the productivity of the hard-brittle materials used in these experiments. Based on these findings, the paper concludes that the origin of a machining crack must exist in the subsurface of the workmaterial.
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Scratching Test of Hard-Brittle Materials Under High Hydrostatic Pressure
Masahiko Yoshino, Associate Professor,,
Masahiko Yoshino, Associate Professor,
Department of Mechano-Aerospace Engineering Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguroku, Tokyo 152-8552, Japan
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Takayuki Aoki, Graduate Student,,
Takayuki Aoki, Graduate Student,
Department of Mechanical Environmental Engineering, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguroku, Tokyo 152-8552, Japan
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Takahiro Shirakashi, Professor,
Takahiro Shirakashi, Professor,
Department of Precision Machining Engineering, Tokyo Denki University, 2-2 Kanda-Nishikicho, Chiyoda-ku, Tokyo 101, Japan
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Masahiko Yoshino, Associate Professor,
Department of Mechano-Aerospace Engineering Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguroku, Tokyo 152-8552, Japan
Takayuki Aoki, Graduate Student,
Department of Mechanical Environmental Engineering, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguroku, Tokyo 152-8552, Japan
Takahiro Shirakashi, Professor,
Department of Precision Machining Engineering, Tokyo Denki University, 2-2 Kanda-Nishikicho, Chiyoda-ku, Tokyo 101, Japan
Contributed by the Manufacturing Engineering Division for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received August 1999; revised April 2000. Associate Editor: M. Yoshino.
J. Manuf. Sci. Eng. May 2001, 123(2): 231-239 (9 pages)
Published Online: April 1, 2000
Article history
Received:
August 1, 1999
Revised:
April 1, 2000
Citation
Yoshino, M., Aoki, T., and Shirakashi, T. (April 1, 2000). "Scratching Test of Hard-Brittle Materials Under High Hydrostatic Pressure ." ASME. J. Manuf. Sci. Eng. May 2001; 123(2): 231–239. https://doi.org/10.1115/1.1347035
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