Accession Number:

AD0766995

Title:

Flow Stress and Yield Point Observations on Normal and Superconducting Indium and Lead,

Descriptive Note:

Corporate Author:

ROYAL MILITARY COLL OF CANADA KINGSTON (ONTARIO)

Personal Author(s):

Report Date:

1972-06-23

Pagination or Media Count:

5.0

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 0.00001sec, the attenuation change delta alphasn takes about 3 s while the related flow stress change delta sigmasn takes about 30 s. In indium delta alphasn and delta sigmasn 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 9291 9 930Reprint Flow Stress and Yield Point Observations on Normal and Superconducting Indium and Lead.

Subject Categories:

  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE