Analysis of the full stress tensor in a micropillar: Ability of and difficulties arising during synchrotron based μLaue diffraction

Davydok, Anton; Jaya, Balila Nagamani; Robach, Odile; Ulrich, Olivier; Micha, Jean‐Sébastien; Kirchlechner, Christoph

doi:10.1016/j.matdes.2016.06.098

Cited by 13 publications

(6 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The microLaue data were taken at the Collaborating Research Group -InterFace (CRG-IF) BM32 beamline at the ESRF using a polychromatic X-ray beam (64), with an approach closely following that of ref. 65. Details of the experimental parameters and analysis are provided in SI Appendix.…”

Section: Discussionmentioning

confidence: 99%

Grain boundary formation through particle detachment during coarsening of nanoporous metals

Elder

Andrews

Ziehmer

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

View full text Add to dashboard Cite

Grain boundary formation during coarsening of nanoporous gold (NPG) is investigated wherein a nanocrystalline structure can form by particles detaching and reattaching to the structure. MicroLaue and electron backscatter diffraction measurements demonstrate that an in-grain orientation spread develops as NPG is coarsened. The volume fraction of the NPG sample is near the limit of bicontinuity, at which simulations predict that a bicontinuous structure begins to fragment into independent particles during coarsening. Phase-field simulations of coarsening using a computationally generated structure with a volume fraction near the limit of bicontinuity are used to model particle detachment rates. This model is tested by using the measured NPG structure as an initial condition in the phase-field simulations. We predict that up to ∼5% of the NPG structure detaches as a dealloyed Ag75Au25 sample is annealed at 300 °C for 420 min. The quantity of volume detached is found to be highly dependent on the volume fraction and volume fraction homogeneity of the nanostructure. As the void phase in the experiments cannot support independent particles, they must fall and reattach to the structure, a process that results in the formation of new grain boundaries. This particle reattachment process, along with other classic processes, leads to the formation of grain boundaries during coarsening in nanoporous metals. The formation of grain boundaries can impact a variety of applications, including mechanical strengthening; thus, the consideration and understanding of particle detachment phenomena are essential when studying nanoporous metals.

show abstract

Section: Discussionmentioning

confidence: 99%

Grain boundary formation through particle detachment during coarsening of nanoporous metals

Elder

Andrews

Ziehmer

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Most of such monochromatic synchrotron based work [58][59][60] use lattice parameter calculations as a means to study their evolution and resulting misfit between γ and γ′ phases during high temperature loading. But the combinatorial and complimentary characterisation approach of micro-Laue diffraction coupled with TEM and crystal plasticity on uniaxial loading allow us to relate the stress response of the material describing the full field plastic strain in three-dimension with the microstructure of the deforming volume [27,61]. From the sequence of time-resolved peak data, it is deduced that strain accommodation by multiple slip systems occurred at rather early stages of straining of the CMSX-4 single crystal but subsequently only the primary slip systems operated until the end of the experiment, in this case.…”

Section: Time-resolved Laue Pattern During Deformationmentioning

confidence: 99%

Investigating spatio-temporal deformation in single crystal Ni-based superalloys using in-situ diffraction experiments and modelling

et al. 2020

View full text Add to dashboard Cite

“…Since the direction of all atomic planes a q remains the same, no changes are observed in the diffraction pattern. Hence, for white-beam Laue diffraction, the unit cell volume cannot be uniquely determined preventing the measurement of the full strain tensor ̿ (except in few special cases where a reliable mechanical model can be plugged into the data analysis [154]). Therefore, standard Laue diffraction only gives access to the deviatoric strain ̿ dev without the hydrostatic term ̿…”

Section: Ii3 Laue Microdiffractionmentioning

confidence: 99%

Progress of in situ synchrotron X-ray diffraction studies on the mechanical behavior of materials at small scales

Cornelius

Thomas

2018

Progress in Materials Science

View full text Add to dashboard Cite

In recent years, the mechanical behavior of low-dimensional materials has been attracting lots of attention triggered both by the ongoing miniaturization and the extraordinary properties demonstrated for nanostructures. It is now well established that mechanical properties of small objects differ fundamentally from their bulk counterpart and in particular that "smaller is stronger" but many questions on the deformation mechanisms remain open. Most of the knowledge obtained on small-scale mechanics is based on ex-situ and in-situ characterizations using electron microscopy. However, these techniques suffer from the fact that imaging or scattering information is either limited to the surface or from a 2D projection of a thin foil of material. Within the last two decades tremendous progress was achieved at 3rd generation synchrotrons making it possible to focus hard X-ray beams down to the 100-nm scale. Modern synchrotron X-ray diffraction methods may thus provide structural information with good spatial resolution and fully 3D. In this review, we discuss the progress achieved on in-situ micro-and nano-mechanical tests coupled with different synchrotron X-ray diffraction techniques to monitor the elastic and plastic deformation, highlighting the advantages of these approaches, which offer at the same time versatile sample environments and extreme precision in displacement fields.

show abstract

Analysis of the full stress tensor in a micropillar: Ability of and difficulties arising during synchrotron based μLaue diffraction

Cited by 13 publications

References 36 publications

Grain boundary formation through particle detachment during coarsening of nanoporous metals

Grain boundary formation through particle detachment during coarsening of nanoporous metals

Investigating spatio-temporal deformation in single crystal Ni-based superalloys using in-situ diffraction experiments and modelling

Progress of in situ synchrotron X-ray diffraction studies on the mechanical behavior of materials at small scales

Contact Info

Product

Resources

About