Accession Number : AD0766995
Title : Flow Stress and Yield Point Observations on Normal and Superconducting Indium and Lead,
Corporate Author : ROYAL MILITARY COLL OF CANADA KINGSTON (ONTARIO)
Personal Author(s) : Hutchison,T. S. ; McBride,S. L.
Report Date : 23 JUN 1972
Pagination or Media Count : 5
Abstract : Measurements of the plastic flow stress and 30 MHz ultrasonic attenuation in normal and superconducting 99.9999% pure In and Pb are presented. For both In and Pb, with a strain rate of 0.00001/sec, the attenuation change delta alpha(sn) takes about 3 s while the related flow stress change delta sigma(sn) takes about 30 s. In indium delta alpha(sn) and delta sigma(sn) are completed in about 40 s; in Pb the corresponding times are about 3 s or less. Experimental evidence is presented which shows unequivocally that the dislocation arrangements in the normal and superconducting states are 9different. (Author) 9 9?291 9 9?30+++Reprint: Flow Stress and Yield Point Observations on Normal and Superconducting Indium and Lead.
Descriptors : (*INDIUM, DISLOCATIONS), (*LEAD(METAL), DISLOCATIONS), (*SUPERCONDUCTORS, MECHANICAL PROPERTIES), STRESSES, ULTRASONIC RADIATION, CREEP, CANADA
Subject Categories : Solid State Physics
Distribution Statement : APPROVED FOR PUBLIC RELEASE