Experimental determination of the line energy of a basal screw dislocation in zinc

N. Nagata W. M. Keck Laboratory of Engineering Materials, California Institute of Technology, Pasadena, California, 91125, U.S.A.; National Research Institute for Metals, Tsukuba Laboratory, Ibaragiken, Japan

K. M. Jassby W. M. Keck Laboratory of Engineering Materials, California Institute of Technology, Pasadena, California, 91125, U.S.A.; University of Tel Aviv, Israel

T. Vreeland Jr. W. M. Keck Laboratory of Engineering Materials, California Institute of Technology, Pasadena, California, 91125, U.S.A.

Abstract

The critical breakaway stress has been measured for basal edge dislocations in zinc with strongly pinned ends and initial lengths which varied from 50 to 250 μm. A line energy of 4.5 eV/atom distance is deduced from these measurements for a screw-orientated dislocation which is parallel to, and approximately 2 μm below, a free surface. Core energy parameters are calculated from a knowledge of the total energy and the energy in the linear elastic strain field.

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Experimental determination of the line energy of a basal screw dislocation in zinc

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Experimental determination of the line energy of a basal screw dislocation in zinc

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