Researcher 3D EBSD data Processing and Integration - SIMAP

Organisation/Company Grenoble INP - Institute of Engineering Department Engineering Research Field Engineering Researcher Profile First Stage Researcher (R1) Positions Postdoc Positions Application Deadline 21 Aug 2026 - 20:00 (Europe/Paris) Country France Type of Contract Temporary Job Status Full-time Offer Starting Date 1 Oct 2026 Is the job funded through the EU Research Framework Programme? Not funded by a EU programme Is the Job related to staff position within a Research Infrastructure? No

Offer Description

Context: Grenoble INP UGA and CEA jointly acquired a state-of-the-art PFIB-SEM dual-beam microscope in 2023. This instrument combines an electron beam with a plasma-focused Xenon ion beam, enabling significantly higher milling rates than conventional Gallium-based dual-beam systems. The PFIB- SEM has since been equipped with a combined EBSD+EDS analysis system featuring a direct- detection CMOS EBSD camera capable of acquiring diffraction patterns at up to 14,500 frames per second at low voltage. This exceptional speed and sensitivity enable the indexing of grains down to 100 nm (see below) at maximum speed. The integration of such a high-speed EBSD camera on a PFIB-SEM opens new avenues for the acquisition of high-resolution 3D EBSD datasets. In this context, the postdoctoral researcher will work on 3D EBSD data acquired using this dual-beam system, and will benefit from close collaboration with the MEM laboratory at CEA Grenoble, leveraging its expertise in Laue micro-diffraction at the BM32 CRG beamline of the ESRF.

Main goals: - The first aim will be to develop a robust and automated workflow for post processing the 3D EBSD data acquired on the PFIB-SEM (slices alignements, grain mapping, calculation of EBSD metrics in 3D). This step is crucial given the innovative nature of the equipment, particularly the combination of the PFIB-SEM with a direct-detection camera. Strategy to accelerate the acquisition on light alloys will be developped for instance by using self-supervised CNN-based denoisingmethods to denoise diffraction patterns. The post-processing will be applied to an initial set of 3D EBSD data acquired on an aluminium alloy produced by additive manufacturing, in order to demonstrate the approach’s ability to reconstruct the 3D morphology of grains ranging in size from a few hundred nanometres to a few micrometers, as well as information on their orientation and three- dimensional crystallographic morphology.

- The second objective will be to combine 3D EBSD measurements with other crystallographic characterisation techniques, notably Laue micro-diffraction, as part of the collaboration with the CEA Grenoble-UGA MEM laboratory. This combination is particularly relevant for the study of polycrystals exhibiting depth-dependent heterogeneities or a very large number of grains, in which case the indexing of diffraction patterns becomes extremely complex using the Laue DAXM method. The prior knowledge of crystallographic orientation provided by 3D EBSD will enhance and improve the reliability of Laue micro-diffraction data indexing, whilst improving the robustness of the associated elastic field measurements.