Abstract
The interactive deformation and enhanced ductility of tri-layerd Cu/Al/Cu composite were studied. The interaction and constraint between bonded Al and Cu layers induced co-deformation, mutually affecting the deformation geometry and hardening behavior of adjacent layer in the composite. The hardening rates of as-rolled Cu/Al/Cu composite modified by the interactive deformation between Cu and Al are greater than those predicted by the rule of mixture. The interactive deformation of Cu and Al layers in layered Cu/Al/Cu with strong interface bonding has a beneficial effect on the ductility. The enhancement of ductility in clad composite increased with increase of ratio of gage width reduction (GWR) of adjacent layers, a measure of the differences of deformability and necking behavior between layers. In the presence of thick brittle interfacial intermetallics, no beneficial effect of mutual constraint on the enhanced deformability was attained and ductility even decreased.
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