About this Abstract |
Meeting |
TMS Specialty Congress 2025
|
Symposium
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The 7th International Congress on 3D Materials Science (3DMS 2025)
|
Presentation Title |
Dynamics of Individual Dislocations During Plastic Deformation |
Author(s) |
Felix T. Frankus, Adam André William Cretton, Sina Borgi, Albert Zelenika, Anter El-Azab, Henning Friis Poulsen, Grethe Winther |
On-Site Speaker (Planned) |
Felix T. Frankus |
Abstract Scope |
The plasticity of metals is fundamental to manufacturing, yet our understanding of the micromechanics of work-hardening remains incomplete due to complex, multiscale interactions between dislocations. Validating theoretical dislocation interaction models requires time-resolved, 3D experimental datasets that represent bulk behaviour.
Recently, Dark-Field X-Ray Microscopy (DFXM) has enabled the imaging of such datasets across hundreds of micrometres within in-situ strained, millimetre-sized specimens. We present DFXM movies of aluminium tensile specimens, capturing dislocation interactions combined with meso-scale structural evolution at low strain levels, including pileups and dislocation boundaries over volumes exceeding several hundred cubic micrometres. Analysis of strain fields around dislocation lines allowed extraction of line directions and Burgers vectors, providing a detailed description of dislocation structure.
We tracked a dislocation pileup configuration from formation through rearrangement to dissolution. These identified configurations serve as input for discrete dislocation dynamics simulations, allowing comparisons between experimental observations and predictions for stress fields and dislocation velocities. |
Proceedings Inclusion? |
Undecided |