Strains, planes, and EBSD in materials science

Wilkinson, Angus J.; Britton, T. Ben

doi:10.1016/s1369-7021(12)70163-3

Cited by 321 publications

(187 citation statements)

References 86 publications

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“…EBSD maps of size 120 x 120 m were recorded over the Ti surface of each sample with an acceleration voltage of 25 kV and a beam current of 4 nA under 70° sample tilt. Further details about the EBDS technique can be found in literature [15,16,20].…”

Section: Methodsmentioning

confidence: 99%

Influence of the Ti microstructure on anodic self-organized TiO2 nanotube layers produced in ethylene glycol electrolytes

Macák

Jarošová

Jäger

et al. 2016

Applied Surface Science

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The relationship between the microstructure of Ti substrates and the anodic growth of selforganized TiO2 nanotube layers obtained upon their anodization in the ethylene glycol based electrolytes on these substrates is reported for the first time. Polished Ti sheets with mirror-like surface as well as unpolished Ti foils were considered in this work. Grains with a wide range of crystallographic orientations and sizes were revealed by Electron Backscatter Diffraction (EBSD) and correlated with nanotube growth on both types of substrates. A preferred grain orientation with (0001) axis perpendicular to the surface was observed on all substrates. Surfaces of all substrates were anodized for 18 hours in ethylene glycol electrolytes containing 88 mM NH4F and 1.5% water and thoroughly inspected by SEM. By a precise comparison of Ti substrates before and after anodization, the uniformity of produced self-organized TiO2 nanotube layers was evaluated in regard to the specific orientation of individual grains. Grains with (0001) axis perpendicular to the surface turned out to be the most growth-promoting orientation on polished substrates. No orientation was found to be strictly growth-retarding, but sufficient This postprint version is available from http://hdl.handle.net/10195/61977 Publisher's version is available from http://www.sciencedirect.com/science/article/pii/S0169433216304482 DOI: 10.1016DOI: 10. /j.apsusc.2016 This document is licenced under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0.International. ______________________________________________________________________________________________________ 2 anodization time (24 hours) was needed to obtain uniform nanotube layers on all grains without remnant porous initial oxide. In contrast with polished Ti sheets, no specific orientation was found to significantly promote or retard the nanotube growth in the case of unpolished Ti foils.Finally, the difference between the average nanotube diameters of nanotubes grown on various grains was investigated showing non-negligible differences in the diameter for different grain orientations and substrates.

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Section: Methodsmentioning

confidence: 99%

Influence of the Ti microstructure on anodic self-organized TiO2 nanotube layers produced in ethylene glycol electrolytes

Macák

Jarošová

Jäger

et al. 2016

Applied Surface Science

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“…The methodology and application of the HR-EBSD technique have been well documented [37,[40][41][42][43]46] and recently reviewed by Wilkinson et al [52] and Britton et al [53], hence it is just briefly described here. Forty 128 pixel x 128 pixel regions of interest were randomly placed across each EBSD pattern and comparison of ROIs between test and reference EBSD patterns enables the calculation of displacements corresponding to zone axes shifts.…”

Section: Ebsd and Hr-ebsd Measurementmentioning

confidence: 99%

On the mechanistic basis of fatigue crack nucleation in Ni superalloy containing inclusions using high resolution electron backscatter diffraction

et al. 2015

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This is an authors' copy of a manuscript published in Acta Materialia Volume 97, 15 September 2015, Pages 367-379. http://dx.doi.org/10.1016/j.actamat.2015.06.035 AbstractA series of interrupted three-point bend low-cycle fatigue tests were carried out on a powder metallurgy FHG96 nickel superalloy sample containing non-metallic inclusions. High resolution electron backscatter diffraction (HR-EBSD) was used to characterize the distribution and evolution of geometrically necessary dislocation (GND) density, residual stress and total dislocation density near a non-metallic inclusion. A systematic study of room temperature cyclic deformation is presented in which slip localisation, cyclic hardening, ratcheting and stabilisation occur, through to crack formation and microstructurally-sensitive propagation. Particular focus is brought to bear at the inclusion-matrix interface. Complex inhomogeneous deformation structures were directly observed from the first few loading cycles, and these structures were found not to vary significantly with increasing number of cycles. A clear link was observed between crack nucleation site and microstructurally-sensitive growth path and the spatially-resolved sites of extreme values of residual stress and GND density.

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“…These differences arise primarily from the heterogeneous microscopic plastic deformation due to the dislocations around the grain boundaries. 46) Also, it is known that a large number of heterogeneous dislocations, which are geometrically necessary dislocations, 47,48) are generated in the proximity of the interfaces, such as grain boundaries and twin boundaries. The heterogeneous dislocation generation and twining during plastic deformation cause fluctuations in the stress levels in the analyzed area bearing in mind that the overall average lattice spacing was analyzed in this study.…”

Section: Stress Distribution In the Sample Under Loadingmentioning

confidence: 99%

Characterization of Evolution of Microscopic Stress and Strain in High-Manganese Twinning-Induced Plasticity Steel

et al. 2015

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Strains, planes, and EBSD in materials science

Cited by 321 publications

References 86 publications

Influence of the Ti microstructure on anodic self-organized TiO2 nanotube layers produced in ethylene glycol electrolytes

Influence of the Ti microstructure on anodic self-organized TiO2 nanotube layers produced in ethylene glycol electrolytes

On the mechanistic basis of fatigue crack nucleation in Ni superalloy containing inclusions using high resolution electron backscatter diffraction

Characterization of Evolution of Microscopic Stress and Strain in High-Manganese Twinning-Induced Plasticity Steel

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