Abstract
Heterogeneous formation of primary and secondary slips in neutron-irradiated copper crystals has been studied by observing slip bands and rows of etchpits of multiplied dislocations and examining lattice rotation of a crystal. Main results are: (1) Primary slip bands form and propagate to complete the bend gliding of a crystal. (2) Secondary slips are formed at a definite side of clustered primary slip bands and edge dislocations in them contribute to the completion of the bend gliding in co-operation with primary edge dislocations. (3) The behaviour of primary and secondary slip bands can be understood in terms of the bend gliding of a crystal under the grip constraint of uniaxial tensile deformation.
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