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Peak Broadening Anisotropy and the Contrast Factor in Metal Alloys
Thomas Simm 
Crystals, Volume: 8, Issue: 5, Start page: 212
Swansea University Author:
Thomas Simm
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DOI (Published version): 10.3390/cryst8050212
Abstract
Diffraction peak profile analysis (DPPA) is a valuable method to understand the microstructure and defects present in a crystalline material. Peak broadening anisotropy, where broadening of a diffraction peak doesn’t change smoothly with 2θ or d-spacing, is an important aspect of these methods. Ther...
| Published in: | Crystals |
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| ISSN: | 2073-4352 |
| Published: |
MDPI
2018
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa40138 |
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| Abstract: |
Diffraction peak profile analysis (DPPA) is a valuable method to understand the microstructure and defects present in a crystalline material. Peak broadening anisotropy, where broadening of a diffraction peak doesn’t change smoothly with 2θ or d-spacing, is an important aspect of these methods. There are numerous approaches to take to deal with this anisotropy in metal alloys, which can be used to gain information about the dislocation types present in a sample and the amount of planar faults. However, there are problems in determining which method to use and the potential errors that can result. This is particularly the case for hexagonal close packed (HCP) alloys. There is though a distinct advantage of broadening anisotropy in that it provides a unique and potentially valuable way to develop crystal plasticity and work-hardening models. In this work we use several practical examples of the use of DPPA to highlight the issues of broadening anisotropy. |
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| Keywords: |
diffraction peak profile analysis (DPPA); contrast factor; dislocations; twinning; crystal plasticity; planar faults; powder diffraction |
| College: |
Faculty of Science and Engineering |
| Issue: |
5 |
| Start Page: |
212 |