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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Advanced Real Time Imaging
Presentation Title Three-dimensional assessment of strain localization at the sub-grain level of a Ni-based superalloy at low and high temperature using laser scanning confocal microscopy
Author(s) Damien Texier, Malo Jullien, Ali Rouwane, Julien Genée, Jean-Charles Stinville, Marc Legros, Jean-Charles Passieux
On-Site Speaker (Planned) Damien Texier
Abstract Scope High resolution-digital image correlation (HR-DIC) techniques are well established to measure strain localization at the sub-grain level in polycrystalline materials. HR-DIC was generally conducted under scanning electron microscopy (SEM) to gain in spatial resolution and micrograph repeatability. However, HR-DIC under SEM only informs on the in-plane kinematics field at the surface of the deformed specimens. This technique is particularly appropriate when the out-of-plane motion related to the three-dimensional (3D) strain localization can be evaluated from another source, i.e., slip events in combination with EBSD. Non-crystallographic strain localization, such as grain boundary sliding, requires the development of 3D measurement techniques. Laser scanning confocal microscopy (LSCM) using near-UV monochromatic source provides less resolved in-plane micrographs but topographic information with a high accuracy (< 20 nm in height). A 3D formulation of the HR-DIC problem was thus implemented to evaluate the full-field strain localization in 3D in a Ni-based superalloy at different temperatures.
Proceedings Inclusion? Planned:
Keywords Characterization, Mechanical Properties, High-Temperature Materials

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Three-dimensional assessment of strain localization at the sub-grain level of a Ni-based superalloy at low and high temperature using laser scanning confocal microscopy
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