|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation Mechanisms
||Analysis of Dislocation Structures in Ferritic and Dual Phase Steels Regarding Continuous and Discontinuous Loading Paths
||Gregory Gerstein, Till Clausmeyer, Florian Gutknecht, A. Erman Tekkaya, Florian Nürnberger
|On-Site Speaker (Planned)
In bulk sheet forming processes the hardening behavior of the material is determined by the choice of the sequence of deformation steps and type of deformation. Loading path changes induce transient hardening phenomena. These phenomena are linked to the formation and interaction of oriented dislocation structures. The aim of this study is to investigate the effect of continuous and discontinuous loading path changes on the dislocation microstructure in a ferritic and a ferritic-martensitic dual-phase steel. A biaxial tester test stand is used, which permits to continuously change the load from tension to shear. Transmission-electron microscopy shows less pronounced evolution of oriented dislocation structures in the ferrite single-phase steel for continuous loading path changes compared to discontinuous loading path changes. This tendency is smaller in dual-phase steel compared to the single phase material. Microstructural results for the ferritic steel are accompanied by simulation results with a transient hardening model.
||Planned: Supplemental Proceedings volume