Yc. Park et al., ULTRASONIC NONDESTRUCTIVE EVALUATION OF ELASTIC-CONSTANTS AND FRACTIONAL RATIO OF AL2O3 FIBER OF ALUMINUM BASE COMPOSITES, Nippon Kinzoku Gakkaishi, 57(3), 1993, pp. 301-306
The purpose of this study was to develop a non-destructive material ev
aluation method of aluminum alloy base metal matrix composite (MMC) by
ultrasonics. Five aluminum base MMC specimens in which the fractional
ratios of fiber were changed from 0% to 31% were fabricated. The rela
tionship between the acoustic properties, microstructural features and
elastic constant were compared. The ultrasonic velocity method was, t
hen, useful for nondestructive elastic constant measurement of composi
te materials, since this method had the same measurement accuracy as t
he conventional strain measurement method. Furthermore, the velocity a
nd attenuation parameter are also related to the fractional ratio of f
iber and these relations may be utilized for the ultrasonic non-destru
ctive evaluation of fiber structure in MMC.