K C Goretta et al 1996 Supercond. Sci. Technol. 9 422 doi:10.1088/0953-2048/9/5/014
C
K C Goretta
, W E Delaney
, J L Routbort
, J Wolfenstine
, W Zhang§ and E E Hellstrom§
Creep behaviour of polycrystalline silver at
C depends primarily on the purity of the Ag. Specimens of 99.999% purity dynamically recrystallized during creep; the stress for recrystallization was
MPa. Oxygen partial pressure had no effect on the creep response. For 99.9% Ag, no dynamic recrystallization occurred; instead, steady-state creep was observed, with the rate-controlling deformation occurring primarily by dislocation motion. Long-term annealing of 99.9% Ag in
increased the steady-state stress by a factor of
. Depending on test conditions, the 99.9% Ag was up to twice as strong as the 99.999% Ag.
74.25.Ld Mechanical and acoustical properties, elasticity, and ultrasonic attenuation
74.70.Ad Metals; alloys and binary compounds (including A15, MgB2, etc.)
Issue 5 (May 1996)
Received 31 October 1995, in final form 18 December 1995
C
K C Goretta et al 1996 Supercond. Sci. Technol. 9 422
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