3D Discrete Dislocation Modelling of High Temperature Plasticity

Tomáš Záležák; Antonín Dlouhý

doi:10.4028/www.scientific.net/KEM.465.115

Paper Titles

Peierls Stresses Estimated from CRSS Vs. Temperature Curve and their Relation to the Crystal Structure
p.97

Stress Relaxation in an AZ31 Magnesium Alloy
p.101

Elastic-Plastic Stress Singularities of Plane V-Notches in Power-Hardening Materials
p.105

Micro- and Macro-Scale Thermomechanical Modelling of Bulk Deformation in Early-Age Cement-Based Materials
p.111

3D Discrete Dislocation Modelling of High Temperature Plasticity
p.115

Numerical Study of the Influence of the Crack Front Curvature in the Evolution of the Plastic Zone along the CT Specimen Thickness
p.119

Complex Variable Green’s Functions for Crack-Microcracks Interactions
p.123

Numerical Modeling of Macroscopic Behavior of Particulate Composite with Crosslinked Polymer Matrix
p.129

On Mathematical Modelling of the Diffusion Characteristics in the close Vicinity of Two Steels Welded Joint
p.133

HomeKey Engineering MaterialsKey Engineering Materials Vol. 4653D Discrete Dislocation Modelling of High...

3D Discrete Dislocation Modelling of High Temperature Plasticity

Abstract:

A 3D model is presented that addresses an evolution of flexible dislocation lines at high temperatures. The model is based on the linear theory of elasticity. A smooth dislocation line is approximated by a piecewise curve composed of short straight dislocation segments. Each dislocation segment is acted upon by a Peach-Koehler force due to a local stress field. All segment-segment interactions as well as an externally applied stress are considered. A segment mobility is proportional to the Peach-Koehler force, temperature-dependent factors control climb and glide motion of the segments. The potential of the model is demonstrated in simulations of simple high temperature processes including interactions of dislocations with secondary particles.

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Periodical:

Key Engineering Materials (Volume 465)

Pages:

115-118

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.465.115

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Online since:

January 2011

Authors:

Tomáš Záležák, Antonín Dlouhý

Keywords:

Diffusion, Discrete Dislocation Dynamics (DDD), High Temperature Deformation, Meso-Scale Simulations of Plasticity

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