Evaluation on micro cracks in ceramic bearing balls by using the floating resonance of surface acoustic waves

Hideo Cho; Kouichi Komatsu; Satoru Ishikawa; Kiyoshi Tanimoto; Hirokazu Takii; Kazushi Yamanaka

doi:10.1143/jjap.42.3176

Evaluation on micro cracks in ceramic bearing balls by using the floating resonance of surface acoustic waves

Hideo Cho, Kouichi Komatsu, Satoru Ishikawa, Kiyoshi Tanimoto, Hirokazu Takii, Kazushi Yamanaka

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

Although resonant ultrasound spectroscopy is useful for testing the surface and the inside of objects, the acoustic properties (resonance frequency, mode amplitude ratio, attenuation, etc.) are disturbed by the contact made with supports and transducers. To eliminate this disturbance, we developed the floating resonance (FR) method in which the acoustic properties of bulk and surface acoustic waves (SAWs) are evaluated using laser ultrasound after floating the objects, thus avoiding the contact with the supports and transducers. In this work we applied the FR method to detect artificial flaws on the surface of ceramic bearing balls and a slit as shallow as 50 μm was successfully detected from the attenuation of SAWs after multiple round trips with as many as 20 turns.

Original language	English
Pages (from-to)	3176-3179
Number of pages	4
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	42
Issue number	5 B
DOIs	https://doi.org/10.1143/jjap.42.3176
Publication status	Published - 2003 May
Externally published	Yes

Keywords

Attenuation
Bearing ball
Defect evaluation
Floating resonance method
Round-trip SAW

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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10.1143/jjap.42.3176

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Evaluation on micro cracks in ceramic bearing balls by using the floating resonance of surface acoustic waves. / Cho, Hideo; Komatsu, Kouichi; Ishikawa, Satoru et al.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 42, No. 5 B, 05.2003, p. 3176-3179.

Research output: Contribution to journal › Article › peer-review

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abstract = "Although resonant ultrasound spectroscopy is useful for testing the surface and the inside of objects, the acoustic properties (resonance frequency, mode amplitude ratio, attenuation, etc.) are disturbed by the contact made with supports and transducers. To eliminate this disturbance, we developed the floating resonance (FR) method in which the acoustic properties of bulk and surface acoustic waves (SAWs) are evaluated using laser ultrasound after floating the objects, thus avoiding the contact with the supports and transducers. In this work we applied the FR method to detect artificial flaws on the surface of ceramic bearing balls and a slit as shallow as 50 μm was successfully detected from the attenuation of SAWs after multiple round trips with as many as 20 turns.",

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AU - Takii, Hirokazu

AU - Yamanaka, Kazushi

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N2 - Although resonant ultrasound spectroscopy is useful for testing the surface and the inside of objects, the acoustic properties (resonance frequency, mode amplitude ratio, attenuation, etc.) are disturbed by the contact made with supports and transducers. To eliminate this disturbance, we developed the floating resonance (FR) method in which the acoustic properties of bulk and surface acoustic waves (SAWs) are evaluated using laser ultrasound after floating the objects, thus avoiding the contact with the supports and transducers. In this work we applied the FR method to detect artificial flaws on the surface of ceramic bearing balls and a slit as shallow as 50 μm was successfully detected from the attenuation of SAWs after multiple round trips with as many as 20 turns.

AB - Although resonant ultrasound spectroscopy is useful for testing the surface and the inside of objects, the acoustic properties (resonance frequency, mode amplitude ratio, attenuation, etc.) are disturbed by the contact made with supports and transducers. To eliminate this disturbance, we developed the floating resonance (FR) method in which the acoustic properties of bulk and surface acoustic waves (SAWs) are evaluated using laser ultrasound after floating the objects, thus avoiding the contact with the supports and transducers. In this work we applied the FR method to detect artificial flaws on the surface of ceramic bearing balls and a slit as shallow as 50 μm was successfully detected from the attenuation of SAWs after multiple round trips with as many as 20 turns.

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KW - Defect evaluation

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Evaluation on micro cracks in ceramic bearing balls by using the floating resonance of surface acoustic waves

Abstract

Keywords

ASJC Scopus subject areas

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