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Published August 1967 | Published + Submitted + Supplemental Material
Journal Article Open

Dislocation Mobility in Copper


The velocity of dislocations of mixed edge-screw type in copper crystals of 99.999% purity has been measured as a function of stress at room temperature. Dislocation displacements produced by torsion stress pulses of microsecond duration were detected by etch pitting {100} surfaces. A nearly linear relationship between dislocation velocity and resolved shear stress was found. Stresses from 2.8×10^6 to 23.1×10^6 dyn/cm^2 produced velocities from 160 to 710 cm/sec. These data give a value of the damping constant for high-velocity dislocations of 7×10^(-4) dyn·sec/cm^2, in good agreement with the values deduced from internalfriction measurements. The results also agree, within experimental and theoretical uncertainties, with the phonon viscosity model for the mobility of dislocations.

Additional Information

© 1967 The American Institute of Physics. Received 8 March 1967. This work was supported by the U.S. Atomic Energy Commission.

Attached Files

Published - GREjap67.pdf

Submitted - Dislocation_Mobility_in_Copper.pdf

Supplemental Material - Dislocation_Mobility_in_Copper_Original_Figures.pdf


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August 21, 2023
October 17, 2023