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Quantitative polarised light microscopy of metals / HAMED Safaie

Swansea University Author: HAMED Safaie

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DOI (Published version): 10.23889/SUthesis.61970

Abstract

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...

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Published: Swansea 2022
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
Supervisor: Pleydell-Pearce, Cameron ; Johnston, Richard
URI: https://cronfa.swan.ac.uk/Record/cronfa61970
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first_indexed 2022-11-21T11:49:42Z
last_indexed 2023-01-13T19:23:06Z
id cronfa61970
recordtype RisThesis
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spelling 2022-11-21T12:16:27.2179564 v2 61970 2022-11-21 Quantitative polarised light microscopy of metals 8a6186ce81e58f64f1f6877ce8595557 HAMED Safaie HAMED Safaie true false 2022-11-21 FGSEN 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. E-Thesis Swansea 8 11 2022 2022-11-08 10.23889/SUthesis.61970 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University Pleydell-Pearce, Cameron ; Johnston, Richard Doctoral Ph.D 2022-11-21T12:16:27.2179564 2022-11-21T11:46:44.1393824 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised HAMED Safaie 1 61970__25855__65126f1b54854088bc4b4ae6a5bb2b0b.pdf Safaie_Hamed_PhD_Thesis_Final_Redacted_Signature.pdf 2022-11-21T11:56:50.7150150 Output 13759765 application/pdf E-Thesis – open access true Copyright: The author, Hamed Safaie, 2022. Released under the terms of a Creative Commons Attribution-Share Alike (CC-BY-SA) License. Third party content is excluded for use under the license terms. true eng https://creativecommons.org/licenses/by-sa/4.0/
title Quantitative polarised light microscopy of metals
spellingShingle Quantitative polarised light microscopy of metals
HAMED Safaie
title_short Quantitative polarised light microscopy of metals
title_full Quantitative polarised light microscopy of metals
title_fullStr Quantitative polarised light microscopy of metals
title_full_unstemmed Quantitative polarised light microscopy of metals
title_sort Quantitative polarised light microscopy of metals
author_id_str_mv 8a6186ce81e58f64f1f6877ce8595557
author_id_fullname_str_mv 8a6186ce81e58f64f1f6877ce8595557_***_HAMED Safaie
author HAMED Safaie
author2 HAMED Safaie
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publishDate 2022
institution Swansea University
doi_str_mv 10.23889/SUthesis.61970
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
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description 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.
published_date 2022-11-08T04:16:05Z
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