Circular polarized light microscopy to investigate the crystal orientation of aluminium

Safaie, Hamed; Coleman, Mark; Johnston, Richard; Das, A.; Russell, James E.; Pleydell‐Pearce, Cameron

doi:10.1016/j.matchar.2022.111749

Cited by 7 publications

(2 citation statements)

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“…The success becomes more evident since we have invented Heilbronner and Pauli and the recent effort in 2018 by Jellison, G. E. However, this method is only applicable to fragile samples, and the accuracy is not comparable to the EBSD method. The CPLM technique has the capability to provide highly accurate data and can also be applied to thick samples as it used the light reflected from the sample to plot the crystal orientation map (146).…”

Section: Chapter 4 Circular Polarised Light Microscopy (Cplm)mentioning

confidence: 99%

“…It was controlling the light instead of rotating the sample, which highly automated the CPLM approach and reduced the operation time and post-processing time. It also provides the opportunity to apply the technique in other applications, which is one of the crucial points for this research to make the technique more applicable to other materials with isotropic and anisotropic crystal systems (146).…”

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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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Section: Chapter 4 Circular Polarised Light Microscopy (Cplm)mentioning

confidence: 99%

mentioning

confidence: 99%