Evolution of orientations and deformation structures within individual grains in cold rolled columnar grained nickel

Wu, Guilin; Godfrey, A.; Winther, Grethe; Jensen, D. Juul; Liu, Q.

doi:10.1016/j.actamat.2011.05.019

Cited by 13 publications

(2 citation statements)

References 35 publications

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“…Electron backscatter diffraction (EBSD) equipped in the scanning electron microscope (SEM) has become a powerful technique to characterize microstructural evolution [4], analyze lattice rotation [5], and predict the active slip systems [6] for crystalline materials. Many structural and textural parameters, such as grain size, grain area, boundary misorientation angle, volume fraction, and distribution of texture, can be conveniently obtained by commercial automatic data analysis software such as Oxford HKL and EDAX TSL.…”

Section: Introductionmentioning

confidence: 99%

An Algorithm to Analyze Electron Backscatter Diffraction Data for Grain Reconstruction: from Methodology to Application

Zheng

Zhang

2016

Acta Metall. Sin. (Engl. Lett.)

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An algorithm for grain reconstruction based on electron backscatter diffraction data was proposed in this paper. This algorithm can well record the original data arrangement when an external file for the reconstructed grain(s) was exported for further post-processing. Assisted by an in-house MATLAB program, grain reconstruction, lattice rotations, orientation spreads, and slip system analysis can be performed. The validity of this algorithm has been successfully tested by polycrystalline Ni before and after channel die compression.

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Section: Introductionmentioning

confidence: 99%

An Algorithm to Analyze Electron Backscatter Diffraction Data for Grain Reconstruction: from Methodology to Application

Zheng

Zhang

2016

Acta Metall. Sin. (Engl. Lett.)

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“…In coarse-grained metals and alloys, plasticity is most typically sustained by the nucleation and glide of dislocations (linear crystal lattice defects). This behavior is accompanied both by crystal lattice rotations and by work hardening, which occurs due to the storage of dislocations during the deformation process ( 3 , 4 ). In nanograined metals, the origin of plasticity is not clear because of the increased difficulty for operation of grain interior dislocation sources ( 5 , 6 ).…”

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confidence: 99%

3D microscopy at the nanoscale reveals unexpected lattice rotations in deformed nickel

He,

Schmidt,

Zhu

et al. 2023

Science

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In polycrystalline metals, plastic deformation is accompanied by lattice rotations resulting from dislocation glide. Following these rotations in three dimensions requires nondestructive methods that so far have been limited to grain sizes at the micrometer scale. We tracked the rotations of individual grains in nanograined nickel by using three-dimensional orientation mapping in a transmission electron microscope before and after in situ nanomechanical testing. Many of the larger-size grains underwent unexpected lattice rotations, which we attributed to a reversal of rotation during unloading. This inherent reversible rotation originated from a back stress–driven dislocation slip process that was more active for larger grains. These results provide insights into the fundamental deformation mechanisms of nanograined metals and will help to guide strategies for material design and engineering applications.

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Quantifying the mesoscopic shear strains in plane strain compressed polycrystalline zirconium

et al. 2014

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Evolution of orientations and deformation structures within individual grains in cold rolled columnar grained nickel

Cited by 13 publications

References 35 publications

An Algorithm to Analyze Electron Backscatter Diffraction Data for Grain Reconstruction: from Methodology to Application

An Algorithm to Analyze Electron Backscatter Diffraction Data for Grain Reconstruction: from Methodology to Application

3D microscopy at the nanoscale reveals unexpected lattice rotations in deformed nickel

Quantifying the mesoscopic shear strains in plane strain compressed polycrystalline zirconium

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