Energy-dispersive X-ray micro Laue diffraction on a bent gold nanowire

AlHassan, Ali; Abboud, Ali J.; Cornelius, Thomas W.; Ren, Zhe; Thomas, O.; Richter, Gunther; Micha, Jean Sébastien; Send, S.; Hartmann, R.; Strüder, L.; Pietsch, U.

doi:10.1107/s1600576720014855

Cited by 7 publications

(3 citation statements)

References 29 publications

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“…One of the strengths of the 2D IB notion is that it completely removes the need to extract any peak profile and that the radii used to define it may be freely chosen as long as they are large enough to accommodate the full peak spreading, smearing, streaking or splitting at the highest studied stress (in our case, 20 pixel radius for integral evaluation and 25-30 pixel radius range for local background). It is therefore quite universal and may be applied to the vast number of in situ micro-Laue tensile, compressive, bending or plastic studies (Bhowmik et al, 2016(Bhowmik et al, , 2018(Bhowmik et al, , 2020Abboud et al, 2014;AlHassan et al, 2021;.…”

Section: Some Considerations On 2d Ibmentioning

confidence: 99%

Using 2D integral breadth to study plastic relaxation in a quasi-lattice-matched HgCdTe/CdZnTe heterostructure

Biquard¹,

Tuaz²,

Ballet³

2022

J Appl Cryst

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Micro-Laue diffraction has been used to record cross-section profiles on a quasi-lattice-matched HgCdTe/CdZnTe heterostructure as a function of the stress induced by a flexion machine. The heterostructure may be decomposed into four different regions according to depth. Sufficiently far from the interface, the CdZnTe substrate is undisturbed by the HgCdTe layer, while the region situated 10 µm beneath the interface presents an in-plane lattice parameter adjustment to the +0.02% mismatched layer. The layer has a 2 µm critical thickness and, beyond, misfit dislocations induce a large peak broadening whose main direction changes with depth. The same occurs over the whole heterostructure once flexion-induced plastification has started. Consequently, the usual full width at half-maximum or integral breadth is no longer relevant, and only a newly defined and rotationally invariant 2D integral breadth correctly measures the plastification-induced peak broadening. Taking into account only the critical thickness region, a 15.1 ± 0.7 MPa tensile HgCdTe elastic limit was measured, slightly overestimated because of the initial compressive layer stress. It was observed that the plastic onset of the substrate perfectly matches the elastic limit of the layer, despite the fact that the substrate elastic limit is expected to be four times higher: a striking demonstration of the propagation of threading dislocations. The `plastification easiness' is found to be 2.4 times smaller deep inside the substrate than in the layer critical thickness region, while in the substrate lattice adjustment region, the plastification easiness goes from the substrate to the layer value with a 22–25 MPa transition interval. This novel method using the 2D integral breadth allows for easy critical thickness measurement as well as precise plastic onset determination and plastification easiness assessment. It is a quite general method, since it may be applied to the vast class of epitaxial layers for which the critical thickness is larger than the micro-Laue beam size (currently 250 nm).

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Section: Some Considerations On 2d Ibmentioning

confidence: 99%

Using 2D integral breadth to study plastic relaxation in a quasi-lattice-matched HgCdTe/CdZnTe heterostructure

Biquard¹,

Tuaz²,

Ballet³

2022

J Appl Cryst

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“…For the investigation of a single monocrystalline NW the use of x-ray micro Laue diffraction [42] and selected area electron diffraction [43] for local lattice orientation and strain profiling along the NW axis have been reported. Both approaches are characterized by an order of magnitude better angular resolution for local lattice orientation as compared to the previously mentioned kinematical approach [40], but the spatial resolution remains poor.…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of three-dimensional strain field in an asymmetrical curved core–shell hetero-nanowire

Kryvyi,

Kret,

Domagala

et al. 2023

Nanotechnology

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Crystal orientation and strain mapping of an individual curved and asymmetrical core-shell hetero-nanowire is performed based on transmission electron microscopy. It relies on a comprehensive analysis of scanning nanobeam electron diffraction data obtained for 1.3 nm electron probe size. The proposed approach also handles the problem of appearing twinning defects on diffraction patterns and allows for the investigation of materials with high defect densities. Based on the experimental maps and their comparison with finite element simulations, the entire core-shell geometry including full three-dimensional strain distribution within the curved core-shell nanowire are obtained. Our approach represents, therefore, a low-dose quasi-tomography of the strain field within a nanoobject using only a single zone axis diffraction experiment. Our approach is applicable also for electron beam-sensitive materials for which performing conventional tomography is a difficult task.

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“…The deep understanding of the crystal rotation and SGs formation mechanisms revealed here could be helpful for optimizing additive manufacturing approaches in order to print perfect products with single-crystal texture. and inhomogeneous strain [32,33].…”

mentioning

confidence: 99%

Dynamic Crystal rocking of Nickel-Based Single Crystal Superalloy during the Epitaxial Growth of the Additive Manufacturing Process

Zhang¹,

Liu

et al. 2022

Preprint

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The understanding of dynamic process of epitaxial microstructure forming in laser additive manufacturing is of vital importance for achieving products with single crystalline texture. Here, we perform in situ, real-time synchrotron Laue diffraction experiments to capture the microsturctural evolution of nickel-based single-crystal superalloys during rapid laser remelting process. In situ synchrotron radiation Laue diffraction characterises the crystal rotation behavior and stray grains formation process. With complementary thermo-mechanical coupled finite element simulation and molecular dynamics simulation, we identify that the crystal rotation is governed by the localized heating heterogeneity induced deformation gradient, and that the subgrains rotation caused by rapid dislocation movement and complex stress field could be the major mechanism in the generation of granular stray grains at the bottom of the melt pool.

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Energy-dispersive X-ray micro Laue diffraction on a bent gold nanowire

Cited by 7 publications

References 29 publications

Using 2D integral breadth to study plastic relaxation in a quasi-lattice-matched HgCdTe/CdZnTe heterostructure

Using 2D integral breadth to study plastic relaxation in a quasi-lattice-matched HgCdTe/CdZnTe heterostructure

Reconstruction of three-dimensional strain field in an asymmetrical curved core–shell hetero-nanowire

Dynamic Crystal rocking of Nickel-Based Single Crystal Superalloy during the Epitaxial Growth of the Additive Manufacturing Process

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