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Dislocation Mobility in Copper

Greenman, W. Frank and Vreeland, Thad, Jr. and Wood, David S. (1967) Dislocation Mobility in Copper. Journal of Applied Physics, 38 (9). pp. 3595-3603. ISSN 0021-8979.

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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.

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Additional Information:© 1967 The American Institute of Physics. Received 8 March 1967. This work was supported by the U.S. Atomic Energy Commission.
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Atomic Energy CommissionUNSPECIFIED
Record Number:CaltechAUTHORS:GREjap67
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Official Citation:Dislocation Mobility in Copper Greenman, W. Frank and Vreeland, Thad and Wood, David S., Journal of Applied Physics, 38, 3595-3603 (1967), DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:12112
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Deposited On:23 Oct 2008 20:52
Last Modified:16 Mar 2015 17:41

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