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The effect of aluminium on twinning in binary alpha-titanium
Acta Materialia, Volume: 103, Pages: 341 - 351
Swansea University Author:
Leo Prakash
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DOI (Published version): 10.1016/j.actamat.2015.09.048
Abstract
The deformation mechanisms of binary Ti–Al model alloys (0–13.1 at.% Aluminium) have been investigated with respect to the twinning activity using in-situ loading in combination with neutron diffraction as well as detailed post mortem electron backscatter diffraction analysis. A consistent starting...
Published in: | Acta Materialia |
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ISSN: | 1359-6454 |
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2016
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URI: | https://cronfa.swan.ac.uk/Record/cronfa24179 |
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<?xml version="1.0"?><rfc1807><datestamp>2020-12-18T15:32:10.1097766</datestamp><bib-version>v2</bib-version><id>24179</id><entry>2015-11-06</entry><title>The effect of aluminium on twinning in binary alpha-titanium</title><swanseaauthors><author><sid>bd72868c48af6c0b04bf9f6bb48ce324</sid><ORCID>0000-0002-8812-8927</ORCID><firstname>Leo</firstname><surname>Prakash</surname><name>Leo Prakash</name><active>true</active><ethesisStudent>false</ethesisStudent></author></swanseaauthors><date>2015-11-06</date><deptcode>MTLS</deptcode><abstract>The deformation mechanisms of binary Ti–Al model alloys (0–13.1 at.% Aluminium) have been investigated with respect to the twinning activity using in-situ loading in combination with neutron diffraction as well as detailed post mortem electron backscatter diffraction analysis. A consistent starting grain size and texture was generated for all alloys promoting tensile twinning during compression testing. Long-wavelength neutron diffraction and selected area diffraction transmission electron microscopy analysis were carried out to detect evidence of Aluminium ordering and Ti3Al formation.It was found that raising the Aluminium content in Titanium does first slightly enhance twinning, with {10View the MathML source2}<10View the MathML source1> tensile twinning being by far the dominant type, while the critical residual intergranular strains for twin initiation decreases. This suggests that either the lowering of stacking fault energy by Aluminium or its solute solution strengthening effect are important factors. At around 7 at.% Aluminium a turning point in twinning activity was noticed and a further increase in Aluminium did result in a dramatic loss of twinning activity particularly when the material had been exposed to an additional low temperature age. The dramatic decrease of twinning activity is strongly correlated with increasing evidence of short range ordering and also early signs of Ti3Al-formation in case of the highest Aluminium content. In addition, electron backscatter diffraction analysis revealed that the formation of Aluminium ordered zones do severely hinder growth of twin boundaries.</abstract><type>Journal Article</type><journal>Acta Materialia</journal><volume>103</volume><journalNumber/><paginationStart>341</paginationStart><paginationEnd>351</paginationEnd><publisher/><placeOfPublication/><isbnPrint/><isbnElectronic/><issnPrint>1359-6454</issnPrint><issnElectronic/><keywords>Deformation twinning; Ti–Al binary alloys; Neutron diffraction; EBSD; Short range ordering</keywords><publishedDay>15</publishedDay><publishedMonth>1</publishedMonth><publishedYear>2016</publishedYear><publishedDate>2016-01-15</publishedDate><doi>10.1016/j.actamat.2015.09.048</doi><url/><notes/><college>COLLEGE NANME</college><department>Materials Science and Engineering</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>MTLS</DepartmentCode><institution>Swansea University</institution><apcterm/><lastEdited>2020-12-18T15:32:10.1097766</lastEdited><Created>2015-11-06T12:53:39.0834589</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Engineering and Applied Sciences - Materials Science and Engineering</level></path><authors><author><firstname>Arnas</firstname><surname>Fitzner</surname><order>1</order></author><author><firstname>Leo</firstname><surname>Prakash</surname><orcid>0000-0002-8812-8927</orcid><order>2</order></author><author><firstname>Joao Quinta da</firstname><surname>Fonseca</surname><order>3</order></author><author><firstname>Matthew</firstname><surname>Thomas</surname><order>4</order></author><author><firstname>Shu-Yan</firstname><surname>Zhang</surname><order>5</order></author><author><firstname>Joe</firstname><surname>Kelleher</surname><order>6</order></author><author><firstname>Pascal</firstname><surname>Manuel</surname><order>7</order></author><author><firstname>Michael</firstname><surname>Preuss</surname><order>8</order></author></authors><documents><document><filename>0024179-21072016111313.pdf</filename><originalFilename>Fitzner2015.pdf</originalFilename><uploaded>2016-07-21T11:13:13.3270000</uploaded><type>Output</type><contentLength>3936555</contentLength><contentType>application/pdf</contentType><version>Version of Record</version><cronfaStatus>true</cronfaStatus><documentNotes>Released under the terms of a Creative Commons Attribution License (CC-BY).</documentNotes><copyrightCorrect>true</copyrightCorrect><language>English</language><licence>http://creativecommons.org/licenses/by/4.0/</licence></document></documents><OutputDurs/></rfc1807> |
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2020-12-18T15:32:10.1097766 v2 24179 2015-11-06 The effect of aluminium on twinning in binary alpha-titanium bd72868c48af6c0b04bf9f6bb48ce324 0000-0002-8812-8927 Leo Prakash Leo Prakash true false 2015-11-06 MTLS The deformation mechanisms of binary Ti–Al model alloys (0–13.1 at.% Aluminium) have been investigated with respect to the twinning activity using in-situ loading in combination with neutron diffraction as well as detailed post mortem electron backscatter diffraction analysis. A consistent starting grain size and texture was generated for all alloys promoting tensile twinning during compression testing. Long-wavelength neutron diffraction and selected area diffraction transmission electron microscopy analysis were carried out to detect evidence of Aluminium ordering and Ti3Al formation.It was found that raising the Aluminium content in Titanium does first slightly enhance twinning, with {10View the MathML source2}<10View the MathML source1> tensile twinning being by far the dominant type, while the critical residual intergranular strains for twin initiation decreases. This suggests that either the lowering of stacking fault energy by Aluminium or its solute solution strengthening effect are important factors. At around 7 at.% Aluminium a turning point in twinning activity was noticed and a further increase in Aluminium did result in a dramatic loss of twinning activity particularly when the material had been exposed to an additional low temperature age. The dramatic decrease of twinning activity is strongly correlated with increasing evidence of short range ordering and also early signs of Ti3Al-formation in case of the highest Aluminium content. In addition, electron backscatter diffraction analysis revealed that the formation of Aluminium ordered zones do severely hinder growth of twin boundaries. Journal Article Acta Materialia 103 341 351 1359-6454 Deformation twinning; Ti–Al binary alloys; Neutron diffraction; EBSD; Short range ordering 15 1 2016 2016-01-15 10.1016/j.actamat.2015.09.048 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2020-12-18T15:32:10.1097766 2015-11-06T12:53:39.0834589 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Arnas Fitzner 1 Leo Prakash 0000-0002-8812-8927 2 Joao Quinta da Fonseca 3 Matthew Thomas 4 Shu-Yan Zhang 5 Joe Kelleher 6 Pascal Manuel 7 Michael Preuss 8 0024179-21072016111313.pdf Fitzner2015.pdf 2016-07-21T11:13:13.3270000 Output 3936555 application/pdf Version of Record true Released under the terms of a Creative Commons Attribution License (CC-BY). true English http://creativecommons.org/licenses/by/4.0/ |
title |
The effect of aluminium on twinning in binary alpha-titanium |
spellingShingle |
The effect of aluminium on twinning in binary alpha-titanium Leo Prakash |
title_short |
The effect of aluminium on twinning in binary alpha-titanium |
title_full |
The effect of aluminium on twinning in binary alpha-titanium |
title_fullStr |
The effect of aluminium on twinning in binary alpha-titanium |
title_full_unstemmed |
The effect of aluminium on twinning in binary alpha-titanium |
title_sort |
The effect of aluminium on twinning in binary alpha-titanium |
author_id_str_mv |
bd72868c48af6c0b04bf9f6bb48ce324 |
author_id_fullname_str_mv |
bd72868c48af6c0b04bf9f6bb48ce324_***_Leo Prakash |
author |
Leo Prakash |
author2 |
Arnas Fitzner Leo Prakash Joao Quinta da Fonseca Matthew Thomas Shu-Yan Zhang Joe Kelleher Pascal Manuel Michael Preuss |
format |
Journal article |
container_title |
Acta Materialia |
container_volume |
103 |
container_start_page |
341 |
publishDate |
2016 |
institution |
Swansea University |
issn |
1359-6454 |
doi_str_mv |
10.1016/j.actamat.2015.09.048 |
college_str |
Faculty of Science and Engineering |
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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering |
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description |
The deformation mechanisms of binary Ti–Al model alloys (0–13.1 at.% Aluminium) have been investigated with respect to the twinning activity using in-situ loading in combination with neutron diffraction as well as detailed post mortem electron backscatter diffraction analysis. A consistent starting grain size and texture was generated for all alloys promoting tensile twinning during compression testing. Long-wavelength neutron diffraction and selected area diffraction transmission electron microscopy analysis were carried out to detect evidence of Aluminium ordering and Ti3Al formation.It was found that raising the Aluminium content in Titanium does first slightly enhance twinning, with {10View the MathML source2}<10View the MathML source1> tensile twinning being by far the dominant type, while the critical residual intergranular strains for twin initiation decreases. This suggests that either the lowering of stacking fault energy by Aluminium or its solute solution strengthening effect are important factors. At around 7 at.% Aluminium a turning point in twinning activity was noticed and a further increase in Aluminium did result in a dramatic loss of twinning activity particularly when the material had been exposed to an additional low temperature age. The dramatic decrease of twinning activity is strongly correlated with increasing evidence of short range ordering and also early signs of Ti3Al-formation in case of the highest Aluminium content. In addition, electron backscatter diffraction analysis revealed that the formation of Aluminium ordered zones do severely hinder growth of twin boundaries. |
published_date |
2016-01-15T03:28:38Z |
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1763751093195505664 |
score |
11.021648 |