Abstract

Abstract It is known that two distinctive phases of dislocation structures, namely the wall-structure of the persistent slip bands (PSBs) and the vein-structure of the matrix, form in a fatigued single crystal. This letter presents TEM observations on copper crystals oriented for double-slip, [122], [012] and [1l2], which reveal that the dislocation structures in these crystals have a great variety and are different from those observed in crystals oriented for single-slip.

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