Accession Number : AD0709940

Title :   INTERACTION OF DISLOCATIONS WITH ELECTRONS AND WITH PHONONS,

Corporate Author : BROWN UNIV PROVIDENCE R I METALS RESEARCH LAB

Personal Author(s) : Hikata,A. ; Johnson,R. A. ; Elbaum,C.

Report Date : AUG 1970

Pagination or Media Count : 33

Abstract : The interaction parameter, B, of moving dislocations with electrons and with phonons in aluminum was determined in the temperature range 10 degrees K to 250 degrees K. A new technique was developed for measuring ultrasonic attenuation changes, the change in alpha, as a function of a dynamic bias stress. The numerical values of B were obtained from an analysis of the change in alpha, which does not require any knowledge of dislocation density or of other inaccurately known features of the dislocation network. The results indicate that the dislocation interaction with electrons is temperature independent and the interaction with phonons increases with increasing temperature. These results are consistent with theoretical predictions. (Author)

Descriptors :   (*ALUMINUM, DISLOCATIONS), (*DISLOCATIONS, MOTION), ELECTRONS, PHONONS, CRYOGENICS, ATTENUATION, ULTRASONIC RADIATION, STRESSES

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE