A crystallographic dislocation model for describing hardening of polycrystals during strain path changes. Application to low carbon steels

By K. Kitayama, C. Tomé, E. Rauch, J. Gracio, Frederic Barlat. 2013

162 citations recorded by the source corpus.

Abstract Polycrystal aggregates subjected to plastic forming exhibit large changes in the yield stress and extended transients in the flow stress following strain path changes. Since these effects are related to the rearrangement of the dislocation structure induced during previous loading, here we propose a crystallographically-based dislocation hardening model for capturing such behavior. The model is implemented in the polycrystal code VPSC and is applied to simulate strain path changes in low carbon steel. The path changes consist of tension followed by shear at different angles with respect to the preload direction, and forward simple shear followed by reverse shear. The results are compared to experimental data and highlight the role that directional dislocation structures induced during preload play during the reload stage.

Subfields: Materials Chemistry, Mechanical Engineering, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/1324afa87b9d1b87a5b1c9788d539779ceb6daa5

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In Materials Chemistry

In Mechanical Engineering

In Mechanics of Materials

Citations in the corpus

A crystal plasticity model incorporating the effects of precipitates in superalloys: Application to tensile, compressive, and cyclic deformation of Inconel 718 (2017, unknown): “The density r s 0 is the total dislocation density at the moment the shear on the sth slip system is reversed (Kitayama et al., 2013).”
Unraveling the temperature dependence of the yield strength in single-crystal tungsten using atomistically-informed crystal plasticity calculations (2015, background): “…1994; Raabe et al., 1994; Raabe, 1995a,b; Peeters et al., 2000; Stainier et al., 2002; Erieau and Rey, 2004; Ma et al., 2007; Hamelin et al., 2011; Kitayama et al., 2013) and with non-Schmid effects (Lee et al., 1999; Kuchnicki et al., 2008; Koester et al., 2012; Weinberger et al., 2012; Alankar…”