Complex strain paths in polycrystalline copper: microstructural aspects

Complex strain paths in polycrystalline copper: microstructural aspects

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Microstructural aspects of polycrystalline copper sheets subjected to complex strain paths were analysed in this work.Dislocation structures developed during the strain paths (rolling and tension) and the evolution of this cashmere roller blinds microstructure during reloading have been studied.The active slip systems developed in each strain path were used to explain the microstructural evolution.

The heterogeneous surface deformation observed on polished tensile specimens prestrained in rolling was also analysed.The structural aspects are related with the mechanical behaviour of the material, namely with 8 oz red bull can dimensions the increase in yield stress in reloading, the work hardening evolution and the premature occurrence of plastic instability for some prestrain values.