Novel optical microscopy techniques to assess grain orientation information in polycrystalline materials

Optical microscopy is often used to characterize the surface microstructure of polycrystalline materials because of its simplicity and low-cost. However, the type of information acquired is limited by the diffraction barrier of optical lenses. For this reason, optical microscopy cannot be employed t...

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Main Author: Wang, Xiaogang
Other Authors: School of Mechanical and Aerospace Engineering
Format: Theses and Dissertations
Language:English
Published: 2018
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Online Access:http://hdl.handle.net/10356/74577
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-745772023-03-11T17:32:13Z Novel optical microscopy techniques to assess grain orientation information in polycrystalline materials Wang, Xiaogang School of Mechanical and Aerospace Engineering DRNTU::Engineering DRNTU::Science Optical microscopy is often used to characterize the surface microstructure of polycrystalline materials because of its simplicity and low-cost. However, the type of information acquired is limited by the diffraction barrier of optical lenses. For this reason, optical microscopy cannot be employed to resolve materials’ atomic structure and its use is typically limited to quantifying the geometry and distribution of the microstructural features that can be resolved, such as crystal grains, phases, and defect. In this project we will use modified optical techniques and develop novel numerical analysis methods to overcome the diffraction barrier of optical microscopy and assess grain orientation information. Our techniques rely on the quantification of reflected light intensity as a function of incident light direction or light polarization. Our results lay the foundation for the development of new optical-based techniques for cost-effective and high-throughput microstructure characterization of polycrystalline materials. Master of Science (Aerospace Engineering) 2018-05-22T01:56:34Z 2018-05-22T01:56:34Z 2018 Thesis http://hdl.handle.net/10356/74577 en 82 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering
DRNTU::Science
spellingShingle DRNTU::Engineering
DRNTU::Science
Wang, Xiaogang
Novel optical microscopy techniques to assess grain orientation information in polycrystalline materials
description Optical microscopy is often used to characterize the surface microstructure of polycrystalline materials because of its simplicity and low-cost. However, the type of information acquired is limited by the diffraction barrier of optical lenses. For this reason, optical microscopy cannot be employed to resolve materials’ atomic structure and its use is typically limited to quantifying the geometry and distribution of the microstructural features that can be resolved, such as crystal grains, phases, and defect. In this project we will use modified optical techniques and develop novel numerical analysis methods to overcome the diffraction barrier of optical microscopy and assess grain orientation information. Our techniques rely on the quantification of reflected light intensity as a function of incident light direction or light polarization. Our results lay the foundation for the development of new optical-based techniques for cost-effective and high-throughput microstructure characterization of polycrystalline materials.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Wang, Xiaogang
format Theses and Dissertations
author Wang, Xiaogang
author_sort Wang, Xiaogang
title Novel optical microscopy techniques to assess grain orientation information in polycrystalline materials
title_short Novel optical microscopy techniques to assess grain orientation information in polycrystalline materials
title_full Novel optical microscopy techniques to assess grain orientation information in polycrystalline materials
title_fullStr Novel optical microscopy techniques to assess grain orientation information in polycrystalline materials
title_full_unstemmed Novel optical microscopy techniques to assess grain orientation information in polycrystalline materials
title_sort novel optical microscopy techniques to assess grain orientation information in polycrystalline materials
publishDate 2018
url http://hdl.handle.net/10356/74577
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