Phenomenological modeling of anisotropy induced by evolution of the dislocation structure on the macroscopic and microscopic scale

This work focuses on the modeling of the evolution of anisotropy induced by the development of the dislocation microstructure. A model formulated at the engineering scale in the context of classical metal plasticity and a model formulated in the context of crystal plasticity are presented. Images obtained by transmission-electron microscopy (TEM) show the influence of the strain path on the evolution of anisotropy for the case of two common materials used in sheet metal forming, DC06 and AA6016-T4. Both models are capable of accounting for the transient behavior observed after changes in loading path for fcc T. Clausmeyer (B) · M. Noman · S. Bargmann Institute of Mechanics, TU Dortmund University, Leonhard-Euler-Straße 5, 44225, Dortmund, Germany e-mail: [email protected] S. Bargmann e-mail: [email protected] T. van den Boogaard Faculty of Engineering Technology, University of Twente, 217, 7500 AE, Enschede, The Netherlands e-mail: [email protected] G. Gershteyn · M. Scharper Institute of Material Science, Leibniz Universität Hannover, An der Universität 2, 30823, Garbsen, Germany G. Gershteyn e-mail: [email protected] M. Scharper e-mail: [email protected] B.Svendsen Chair of Material Mechanics, RWTH Aachen University, Schinkelstraße 2, 52062, Aachen, Germany e-mail: [email protected] and bcc metals. The evolution of the internal variables of the models is correlated with the evolution of the dislocation structure observed by TEM investigations.