EBSD: a powerful microstructure analysis technique in the field of solidification

Boehm-Courjault, E.; Gonzales, F.; Jacot, Arthur Paul; Kohler, F.; Mariaux, Aurèle; Niederberger, Christoph; Salgado-Ordorica, M.A.; Rappaz, M.

doi:10.1111/j.1365-2818.2008.03107.x

Cited by 11 publications

(6 citation statements)

References 32 publications

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“…a stereographic projection of observed crystallographic directions. [19] Solidified, spherical samples were overcasted with numerous fine geodesics resembling the mesh of lattitudes and longitudes on a globe. Ten longitudes meet at two poles marking the onset point of solidification and its antipode, allowing for an oriented embedding.…”

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confidence: 99%

Quasicrystal nucleation and ℤ module twin growth in an intermetallic glass-forming system

Hornfeck¹,

Kobold²,

Kolbe³

et al. 2018

Nat Commun

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While quasicrystals possess long-range orientational order they lack translation periodicity. Considerable advancements in the elucidation of their structures and formative principles contrast with comparatively uncharted interrelations, as studies bridging the spatial scales from atoms to the macroscale are scarce. Here, we report on the homogeneous nucleation of a single quasicrystalline seed from the undercooled melt of glass-forming NiZr and its continuous growth into a tenfold twinned dendritic microstructure. Observing a series of crystallization events on electrostatically levitated NiZr confirms homogeneous nucleation. Mapping the microstructure with electron backscatter diffraction suggests a unique, distortion-free structure merging a common structure type of binary alloys with a spiral growth mechanism resembling phyllotaxis. A general geometric description, relating all atomic loci, observed by atomic resolution electron microscopy, to a pentagonal module, explains how the seed’s decagonal long-range orientational order is conserved throughout the symmetry breaking steps of twinning and dendritic growth.

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mentioning

confidence: 99%

Quasicrystal nucleation and ℤ module twin growth in an intermetallic glass-forming system

Hornfeck¹,

Kobold²,

Kolbe³

et al. 2018

Nat Commun

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“…2 reveal the expected qualitative differences of the quasicrystal solidification near the sample edge compared to the center region, we investigated these two areas by EBSD using pattern matching to the experimental Kikuchi standard. For an overview of applications of EBSD in the field of solidification, see 27 .…”

Section: Microtexture Of a Quasicrystalline Materialsmentioning

confidence: 99%

Standard-Based EBSD: Fingerprinting of Order and Orientation in Materials

Winkelmann¹,

Cios²,

Tokarski³

et al. 2019

Preprint

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Orientation determination does not necessarily require complete knowledge of the local atomic arrangement in a material. We present a method for microstructural phase discrimination and orientation analysis of phases for which there is only limited information available. In this method, experimental Kikuchi diffraction patterns are utilized to generate self-consistent standards for use in the technique of Electron Backscatter Diffraction (EBSD). As an application example, we map the locally varying orientations in samples of icosahedral quasicrystals observed in a Ti40Zr40Ni20 alloy.

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“…This found that the [0001] direction in the HCP oxide was parallel to the [001] direction in the FCC substrate, albeit this was defined from a limited number of cases given the significant complexity in making these measurements. The inherently surface sensitive nature of the technique proposed coupled with the EBSD measurements permits more extensive insight into these observations and the potential for similar approaches with other cubic systems (11,73,110,112).…”

Section: Discussionmentioning

confidence: 99%

“…These conditions were fixed to produce the required thickness of alumina on the surface in the same way as mentioned by (31,112,118 proves the ¼ wave plate thickness and wavelength are suitable. (85,92,120,122).…”

Section: Materials Preparationmentioning

confidence: 99%

“…The influence of texture (grain orientation distribution) on the mechanical performance of aluminium is well documented (10,19,78). Assisted primarily by crystal orientation mapping (COM) and electron backscatter diffraction EBSD (70,112). Although now widely used, EBSD is still a specialized technique that is both expensive and potentially time consuming for assessing texture characteristics as routine design / quality control criteria in an industrial environment (78,113).…”

Section: Introductionmentioning

confidence: 99%

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Quantitative polarised light microscopy of metals

Safaie¹

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For most engineering metals a material’s crystal structure can play a significant role in its performance in service. This is particularly relevant for materials that display pronounced differences in their physical properties depending on the arrangement and orientation of these crystals. Examples of such alloys are titanium and aluminium which are employed in a wide range of applications from medical to structural. Conventionally, the crystal structure of these materials is measured using various X-ray and electron diffraction techniques. Unfortunately, these are generally costly, time-consuming and therefore impractical in an industrial quality assurance setting. On-going research at Swansea University has demonstrated that a simpler alternative offers a solution to this problem. The project aimed to build on this research to develop a semi-automated method to conduct this analysis. The work involves extensive characterisation of various materials using optical and electron microscopes; this will focus on the direct correlation of electron diffraction data to polarised light microscopy. The project will concentrate on developing this apparatus to provide high quality, reliable information on material crystal structures. Electron Backscatter Diffraction (EBSD) is the most well-known approach to investigate the crystal orientation of polycrystalline material. However, when compared to optical microscopy EBSD is an expensive approach, very time consuming and complex laboratory technique needed to plot a crystal orientation map. The research offers a novel approach for optically anisotropic (titanium) and isotropic (aluminium) material to plot the crystal orientation map. The aim of the research is to offer a simpler, cheaper, and less time-consuming method which can be affordable by a middle-class company to have access to the crystal orientation map.

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EBSD: a powerful microstructure analysis technique in the field of solidification

Cited by 11 publications

References 32 publications

Quasicrystal nucleation and ℤ module twin growth in an intermetallic glass-forming system

Quasicrystal nucleation and ℤ module twin growth in an intermetallic glass-forming system

Standard-Based EBSD: Fingerprinting of Order and Orientation in Materials

Quantitative polarised light microscopy of metals

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