대한기계학회논문집 (Transactions of the Korean Society of Mechanical Engineers)
- 제18권4호
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- Pages.816-825
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- 1994
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- 1225-5963(pISSN)
DOI QR Code
초음파법에 의한 $Al_2O_3/AC8A$ 복합재료의 특성평가
Non-Destructive Evaluation of $Al_2O_3/AC8A$ Composite by Ultrasonic Measurement
초록
The purpose of this study is to develop the non-destructive material evaluation method of aluminum alloy base metal matrix composite(MMC) by ultrasonics. Five aluminum base MMC specimens were fabricated in which the fractional ratios of fiber were changed from 0% to 31%. Relations among acoustic properties, microstructural features and elastic constant were compared. The ultrasonic velocity method was useful for nondestructive elastic constant measurement of composite materials, since the method had as same accuracy as conventional strain measurement method. Furthermore, velocity, attenuation and backscattering behaviors for each specimen also related to fractional ratio of fiber and these relations could utilize ultrasonic non-destructive evaluation of fiber structure in MMC.
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