Abstract
It has been shown that dislocation cells induce intragranular backstresses due to blockage of dislocation passage. The present work focuses on the effects of dislocation induced backstresses on the strain hardening behavior of AA 6063-T6 extruded aluminum alloy during cyclic planar simple shear deformation. Based on the previous work of Brahme et al. [1], the internal stresses are predicted using a close form solution based on the Eshelby’s inclusion problem. Using this approach the inherent dislocation microstructure is modeled as a two-phase material consisting of highly dense harder cell walls and less dense soft cell interiors. The new formulation also takes into account the evolution of dislocation cell structure with plastic deformation. Simulations are performed for simple shear and the predictions are compared against experimentally obtained flow stresses for forward, reverse and subsequent forward in-plane simple shearing.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.