O. Robach
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View article: Exploration of the hysteresis of martensite-austenite transition in bulk \b{eta}-Cu-Zn-Al single crystals
Exploration of the hysteresis of martensite-austenite transition in bulk \b{eta}-Cu-Zn-Al single crystals Open
Improvement of functional and structural fatigue endurance for applications of ferroelastic materials requires an optimization of their composition. A strategy for finding alloy compositions that minimize the transformation hysteresis is n…
View article: Intermitted 3D Diffraction Tomography Combined with In situ Laue Diffraction to Characterize Dislocation Structures and Stress Fields in Microbending Cantilevers
Intermitted 3D Diffraction Tomography Combined with In situ Laue Diffraction to Characterize Dislocation Structures and Stress Fields in Microbending Cantilevers Open
The mechanisms of plastic deformation are investigated using different characterization tools as scanning electron microscopy (SEM), transmission electron microscopy, or synchrotron‐based X‐ray techniques like Laue microdiffraction (μLaue)…
View article: LaueNN: neural-network-based <i>hkl</i> recognition of Laue spots and its application to polycrystalline materials
LaueNN: neural-network-based <i>hkl</i> recognition of Laue spots and its application to polycrystalline materials Open
A feed-forward neural-network-based model is presented to index, in real time, the diffraction spots recorded during synchrotron X-ray Laue microdiffraction experiments. Data dimensionality reduction is applied to extract physical 1D featu…
View article: Simultaneous Multi-Bragg Peak Coherent X-ray Diffraction Imaging
Simultaneous Multi-Bragg Peak Coherent X-ray Diffraction Imaging Open
The simultaneous measurement of two Bragg reflections by Bragg coherent X-ray diffraction is demonstrated on a twinned Au crystal, which was prepared by the solid-state dewetting of a 30 nm thin gold film on a sapphire substrate. The cryst…
View article: In‐situ force measurement during nano‐indentation combined with Laue microdiffraction
In‐situ force measurement during nano‐indentation combined with Laue microdiffraction Open
For the characterization of the mechanical properties of materials the precise measurements of stress‐strain curves is indispensable. In situ nano‐mechanical testing setups, however, may lack the precision either in terms of strain or stre…
View article: First stages of plasticity in three-point bent Au nanowires detected by <i>in situ</i> Laue microdiffraction
First stages of plasticity in three-point bent Au nanowires detected by <i>in situ</i> Laue microdiffraction Open
The first stages of plasticity in three-point bent Au nanowires are investigated by in situ three-point bending tests in combination with Laue micro-diffraction. To separate the elastic and plastic deformation, loading–unloading cycles wer…
View article: Carbon Monoxide Oxidation Promoted by a Highly Active Strained PdO Layer at the Surface of Au<sub>30</sub>Pd<sub>70</sub>(110)
Carbon Monoxide Oxidation Promoted by a Highly Active Strained PdO Layer at the Surface of Au<sub>30</sub>Pd<sub>70</sub>(110) Open
International audience
View article: Three-point bending behavior of a Au nanowire studied by <i>in-situ</i> Laue micro-diffraction
Three-point bending behavior of a Au nanowire studied by <i>in-situ</i> Laue micro-diffraction Open
The elastic and plastic deformation of a gold nanowire tested in a three-point bending configuration using the custom-built scanning force microscope SFINX was studied in situ by Laue micro-diffraction. A new data treatment method based on…
View article: High stresses stored in fault zones: example of the Nojima fault (Japan)
High stresses stored in fault zones: example of the Nojima fault (Japan) Open
During the last decade pulverized rocks have been described on outcrops along large active faults and attributed to damage related to a propagating seismic rupture front. Questions remain concerning the maximal lateral distance from the fa…
View article: Supplementary material to "High stresses stored in fault zones: example of the Nojima fault (Japan)"
Supplementary material to "High stresses stored in fault zones: example of the Nojima fault (Japan)" Open
Figure S1 -Microphotographs and orientation histograms of (a) alignments of tiny fluid inclusions and (b) kinks in biotites in the NOJ220 sample.
View article: High stresses stored in fault zones: example of the Nojima fault (Japan)
High stresses stored in fault zones: example of the Nojima fault (Japan) Open
During the last decade pulverized rocks have been described on outcrops along large active faults and attributed to damage related to a propagating seismic rupture front. Questions remain on the maximal lateral distance from the fault plan…
View article: Full elastic strain tensor determination at the phase scale in a powder metallurgy nickel-based superalloy using X-ray Laue microdiffraction
Full elastic strain tensor determination at the phase scale in a powder metallurgy nickel-based superalloy using X-ray Laue microdiffraction Open
Laue microdiffraction is used to determine the full elastic strain tensor of the γ and γ′ phases in grains of a nickel-based superalloy with a coarse-grained microstructure. A `rainbow' filter and an energy dispersive point detector are em…
View article: Evidence of 3D strain gradients associated with tin whisker growth
Evidence of 3D strain gradients associated with tin whisker growth Open
We have used Differential Aperture X-ray Microscopy (DAXM) to measure grain orientations and deviatoric elastic strains in 3D around a tin whisker. The results show strain gradients through the depth of the tin coating, revealing a higher …
View article: Direct measurement of local constitutive relations, at the micrometre scale, in bulk metallic alloys
Direct measurement of local constitutive relations, at the micrometre scale, in bulk metallic alloys Open
Multiscale models involving crystal plasticity are essential to predict the elastoplastic behavior of structural materials with respect to their microstructure. However, those models are often limited by a poor knowledge of the local const…
View article: Effect of Thermal and Mechanical Loadings on the Residual Stress Field in a Nickel Based Superalloy using X-Ray Laue Microdiffraction
Effect of Thermal and Mechanical Loadings on the Residual Stress Field in a Nickel Based Superalloy using X-Ray Laue Microdiffraction Open
Effect of Thermal and Mechanical Loadings on the Residual Stress Field in a Nickel Based Superalloy using X-Ray Laue Microdiffraction G. Altinkurt, M. Fèvre, G. Geandier, O. Robach, S. Guernaoui, M. Dehmas Abstract. The shot-peening operat…
View article: Lattice strain and tilt mapping in stressed Ge microstructures using X-ray Laue micro-diffraction and rainbow filtering
Lattice strain and tilt mapping in stressed Ge microstructures using X-ray Laue micro-diffraction and rainbow filtering Open
Laue micro-diffraction and simultaneous rainbow-filtered micro-diffraction were used to measure accurately the full strain tensor and the lattice orientation distribution at the sub-micrometre scale in highly strained, suspended Ge micro-d…
View article: Effect of thermal and mechanical loadings on the residual stress field in a nickel based superalloy using X-ray Laue microdiffraction
Effect of thermal and mechanical loadings on the residual stress field in a nickel based superalloy using X-ray Laue microdiffraction Open
International audience
View article: Lattice strain and tilt mapping in stressed Ge microstructures using\n X-ray Laue micro-diffraction and rainbow-filtering
Lattice strain and tilt mapping in stressed Ge microstructures using\n X-ray Laue micro-diffraction and rainbow-filtering Open
Micro-Laue diffraction and simultaneous rainbow-filtered micro-diffraction\nwere used to measure accurately the full strain tensor and the lattice\norientation distribution at the sub-micron scale in highly strained, suspended\nGe micro-de…