CALCULATIONS OF THE ELECTRON DAMPING FORCE ON MOVING EDGE DISLOCATIONS - eScholarship

-i- LBL--12223 DE83 011744 CALCULATIONS OF THE ELECTRON-DAMPING FORCE ON MOTOKHEDGE DISLOCATIONS Tetsuo Mohri Materials and Molecular Research Division, Lawrence Berkeley Laboratory and Department of Materials Science and Mineral Engineering, University of California, Berkeley, California 94720 NOTICE F0RTI0H8 OF YHW HEPOUT ABE IHEGIBIE. H has been reproduced from the best available copy to permit the broadest possible availability. ABSTRACT Dynamic effect of a moving dislocation has been recognized as one of essential features of deformation behavior at very low tem­ peratures. Damping mechanisms are the central problems in this field. Based on the free-electron-gas model, the electron-damping force (friction force) on a moving-edge dislocation in a normal state is estimated. By applying classical Mackenzie-Sondheimer's procedures, the electrical resistivity caused by a moving disloca­ tion is first estimated, and the damping force is calculated as a Joule-heat-energy dissipation. The calculated values are 3.63x10-*, This manuscript was printed from originals provided by t h e a u t h o r - • -tvmmm* **®