Cyclic deformation behaviour of Cu-16at.%Al single crystals part II: Cyclic hardening and slip band behavior

The dislocation structures induced by the cyclic deformation of Cu-16 at. pct Al alloy single crystals oriented, typically, as [123] for single slip and [023] and [117] for double slip, were studied by transmission electron microscopy (TEM) and compared with the results of Cu single crystals. Completely unlike the dislocation structures of Cu single crystals of corresponding orientations, the dislocation structures of these oriented Cu-16 at. pct Al alloy single crystals show a typical planar morphology. As the applied-plastic-stain amplitude increases, the dislocation configuration changes, on the whole, from multipolar arrays to dislocation tangles in the primary slip plane and from lowdensity planar slip bands to well-developed persistent Lüder's bands (PLBs) in the planes normal to the primary slip plane, respectively. Secondary slips can be clearly observed to activate from very low plastic-strain amplitudes in all three Cu-16 at. pct Al single crystals investigated. Interestingly, the crystallographic orientation has almost no effect on the dislocation structure of Cu-16 at. pct Al single crystals.

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Cyclic deformation behaviour of Cu-16at.%Al single crystals part II: Cyclic hardening and slip band behavior

Cited by 48 publications

References 32 publications

On the transition of fatigue crack growth from stage i to stage II in a corrosive environment

On the transition of fatigue crack growth from stage i to stage II in a corrosive environment

Faceted fatigue fracture and its relation to the crystallographic slip systems in Cu-16 at. Pct al single crystals

Orientation dependence of dislocation structures in cyclically deformed Cu-16 At. Pct Al alloy single crystals

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