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Peak broadening anisotropy in deformed face-centred cubic and hexagonal close-packed alloys

T. H. Simm, P. J. Withers, J. Quinta da Fonseca, Thomas Simm Orcid Logo

Journal of Applied Crystallography, Volume: 47, Issue: 5, Pages: 1535 - 1551

Swansea University Author: Thomas Simm Orcid Logo

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DOI (Published version): 10.1107/S1600576714015751

Abstract

The broadening of diffraction peaks representing different families of grain orientations has been measured for a number of deformed metals: austenitic stainless steel 316, nickel 200 and the titanium alloy Ti-6Al-4V. These measurements have been compared with predictions that explain differences in...

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Published in: Journal of Applied Crystallography
ISSN: 1600-5767
Published: 2014
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URI: https://cronfa.swan.ac.uk/Record/cronfa34676
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last_indexed 2018-05-14T13:28:20Z
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spelling 2018-05-14T11:25:47.7880896 v2 34676 2017-07-17 Peak broadening anisotropy in deformed face-centred cubic and hexagonal close-packed alloys 10fa7732a6aee5613ff1364dc8460972 0000-0001-6305-9809 Thomas Simm Thomas Simm true false 2017-07-17 EEN The broadening of diffraction peaks representing different families of grain orientations has been measured for a number of deformed metals: austenitic stainless steel 316, nickel 200 and the titanium alloy Ti-6Al-4V. These measurements have been compared with predictions that explain differences in broadening in terms of the contrast factor of dislocations via two different approaches. This was done in order to understand the effect the contrast factor has on the results of diffraction peak profile analysis methods and the cause of broadening anisotropy. An approach that considers all grains and orientations to behave similarly was found to be unsuccessful in explaining the large variations of broadening in different peaks. These variations can be explained, and errors reduced, by adopting an approach that uses a polycrystal plasticity model. However, if the plasticity based approach is used to solely calculate changes in the contrast factor, it only partly explains changes in broadening. Instead, factors such as variations in the dislocation density and crystallite size in different orientations, the number of dislocations that are mobile, and the number of edge and screw dislocations need consideration. The way to incorporate these additional factors is difficult, but their contribution to broadening anisotropy can be as important as that of the contrast factor. Journal Article Journal of Applied Crystallography 47 5 1535 1551 1600-5767 diffraction peak broadening; anisotropy; deformed alloys; grain orientation. 31 12 2014 2014-12-31 10.1107/S1600576714015751 http://scripts.iucr.org/cgi-bin/paper?S1600576714015751 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University EPSRC 2018-05-14T11:25:47.7880896 2017-07-17T16:01:45.7471656 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised T. H. Simm 1 P. J. Withers 2 J. Quinta da Fonseca 3 Thomas Simm 0000-0001-6305-9809 4
title Peak broadening anisotropy in deformed face-centred cubic and hexagonal close-packed alloys
spellingShingle Peak broadening anisotropy in deformed face-centred cubic and hexagonal close-packed alloys
Thomas Simm
title_short Peak broadening anisotropy in deformed face-centred cubic and hexagonal close-packed alloys
title_full Peak broadening anisotropy in deformed face-centred cubic and hexagonal close-packed alloys
title_fullStr Peak broadening anisotropy in deformed face-centred cubic and hexagonal close-packed alloys
title_full_unstemmed Peak broadening anisotropy in deformed face-centred cubic and hexagonal close-packed alloys
title_sort Peak broadening anisotropy in deformed face-centred cubic and hexagonal close-packed alloys
author_id_str_mv 10fa7732a6aee5613ff1364dc8460972
author_id_fullname_str_mv 10fa7732a6aee5613ff1364dc8460972_***_Thomas Simm
author Thomas Simm
author2 T. H. Simm
P. J. Withers
J. Quinta da Fonseca
Thomas Simm
format Journal article
container_title Journal of Applied Crystallography
container_volume 47
container_issue 5
container_start_page 1535
publishDate 2014
institution Swansea University
issn 1600-5767
doi_str_mv 10.1107/S1600576714015751
college_str Faculty of Science and Engineering
hierarchytype
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
url http://scripts.iucr.org/cgi-bin/paper?S1600576714015751
document_store_str 0
active_str 0
description The broadening of diffraction peaks representing different families of grain orientations has been measured for a number of deformed metals: austenitic stainless steel 316, nickel 200 and the titanium alloy Ti-6Al-4V. These measurements have been compared with predictions that explain differences in broadening in terms of the contrast factor of dislocations via two different approaches. This was done in order to understand the effect the contrast factor has on the results of diffraction peak profile analysis methods and the cause of broadening anisotropy. An approach that considers all grains and orientations to behave similarly was found to be unsuccessful in explaining the large variations of broadening in different peaks. These variations can be explained, and errors reduced, by adopting an approach that uses a polycrystal plasticity model. However, if the plasticity based approach is used to solely calculate changes in the contrast factor, it only partly explains changes in broadening. Instead, factors such as variations in the dislocation density and crystallite size in different orientations, the number of dislocations that are mobile, and the number of edge and screw dislocations need consideration. The way to incorporate these additional factors is difficult, but their contribution to broadening anisotropy can be as important as that of the contrast factor.
published_date 2014-12-31T03:43:02Z
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score 11.012723

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