Complex strain paths in polycrystalline copper: microstructural aspects
Open Access
- 1 July 1999
- journal article
- Published by FapUNIFESP (SciELO) in Materials Research
- Vol. 2 (3), 185-189
- https://doi.org/10.1590/s1516-14391999000300012
Abstract
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 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 the increase in yield stress in reloading, the work hardening evolution and the premature occurrence of plastic instability for some prestrain valuesKeywords
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