抄録
The ultrasonic attenuation change during both elastic and plastic deformation was measured simultaneously in copper single crystal. The frequency dependence of attenuation was also measured at the various steps of the plastic deformation. The measurement results were analyzed through the Granato-Lucke theory and dislocation parameters were calculated. On the other hand the applicability of the Granato-Lucke string model to BCC metal is not obvious. In this study the measurement of the change in the ultrasonic attenuation and its frequency dependence was performed in Si-Fe single crystals in the same way as copper single crystal. The obtained results were analyzed through kink model which has the potential applicability to BCC metal. The applicability of string model to BCC metal was examined. The calculation results obtained by string model coincided with those of kink model. From these discussions the applicability of string model to Si-Fe single crystal of BCC metal was confirmed.
