Incorporation of Slip Dislocations in Mechanical Twins of Tin Crystals

概要

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The atom arrangements and the motion of twin dislocation in β-tin crystal, accornpanying the inhomogeneous movement of atoms, are described. Then, it is pointed out that, in the case of β-tin crystal, all of the steps caused on the twin boundary by the passage of slip dislocations are composed of twin dislocations, the number of segments of twin dislocations being equal to the number of twin layers cut through by the Burgers vector of the slip dislocation.The transformation matrix for the transformation of the Miller indices of slip dislocations are derived for the <103> {301} twinning. These transformations characteristic of tin crystals have as results the stacking faults either in the parent crystal or in the twin, and the annihilation of some of the slip dislocations.The above discussions are compared with available data. It is suggested that the substructure of twins in tin crystals observed by the transmission electron microscopy will be composed of twin dislocations produced by the arrays of slip dislocations cutting through the twin boundary.
社団法人日本物理学会の論文
1963-08-05