Influence of Dislocation Drag on Twinning in Zinc

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Abstract
This paper presents measurements of the influence of magnetic fields on the plastic deformation of zinc. In particular it is shown that both slip processes and twinning are affected by the presence or absence of magnetic fields. Furthermore, it is shown that the motion of dislocations is required for twinning and that twinning can be altered through a change in magnetic field which determines the dislocation velocity. These results are explained by treating the dislocations as underdamped oscillators.