Plastic anisotropy in precipitation-strengthened aluminium alloys deformed in uniaxial and plane strain deformation

摘要

The goal of this work was to quantitatively assess the plastic anisotropy of strongly textured polycrystals with and without a distribution of hard (nonshearable by dislocations) precipitates. The anisotropic behaviour was characterized by the dimensional change in the deformed uniaxial deformation specimens and the stress-strain curves measured in uniaxial and plane strain compression tests. A model based on kinematic hardening was developed to quantitatively describe the plastic behaviour of materials containing hard precipitates such as theta' in Al-Cu alloys. The results of this model were compared with the experimental results. [References: 10]