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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. http://resolver.caltech.edu/CaltechAUTHORS:GREjap67

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Abstract

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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.1710178DOIUNSPECIFIED
http://link.aip.org/link/?JAPIAU/38/3595/1PublisherUNSPECIFIED
Additional Information:© 1967 The American Institute of Physics. Received 8 March 1967. This work was supported by the U.S. Atomic Energy Commission.
Record Number:CaltechAUTHORS:GREjap67
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:GREjap67
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ID Code:12112
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Deposited On:23 Oct 2008 20:52
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