Journal article 898 views
Crystal plasticity, fatigue crack initiation and fatigue performance of advanced titanium alloys
E SACKETT,
L GERMAIN,
M BACHE,
Elizabeth Sackett 
International Journal of Fatigue, Volume: 29, Issue: 9-11, Pages: 2015 - 2021
Swansea University Author:
Elizabeth Sackett
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DOI (Published version): 10.1016/j.ijfatigue.2006.12.011
Abstract
The fatigue behaviour of a novel large grained variant of the near α titanium alloy Ti 685 is described. Load controlled low cycle fatigue fractures in plain cylindrical specimens demonstrate the highly crystallographic nature of the failure process. When compared to similar data for conventional gr...
| Published in: | International Journal of Fatigue |
|---|---|
| ISSN: | 01421123 |
| Published: |
2007
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa40102 |
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<?xml version="1.0"?><rfc1807><datestamp>2018-05-11T12:39:14.7621744</datestamp><bib-version>v2</bib-version><id>40102</id><entry>2018-05-11</entry><title>Crystal plasticity, fatigue crack initiation and fatigue performance of advanced titanium alloys</title><swanseaauthors><author><sid>55d1695a53656de6b0bdfa4c08d8bcd4</sid><ORCID>0000-0002-5975-6967</ORCID><firstname>Elizabeth</firstname><surname>Sackett</surname><name>Elizabeth Sackett</name><active>true</active><ethesisStudent>false</ethesisStudent></author></swanseaauthors><date>2018-05-11</date><deptcode>MTLS</deptcode><abstract>The fatigue behaviour of a novel large grained variant of the near α titanium alloy Ti 685 is described. Load controlled low cycle fatigue fractures in plain cylindrical specimens demonstrate the highly crystallographic nature of the failure process. When compared to similar data for conventional grain size Ti 685 variants the LG685 material clearly offers reduced fatigue and static strength. An alternative flat plate specimen design was employed together with electronic speckle pattern interferometry and strain gauges to monitor the inhomogeneous strain accumulation in this large grained variant under load control conditions. Dwell fatigue tests indicated that the eventual location for crack initiation and subsequent failure could be identified as early as the first loading cycle. The precise crystallographic orientations of the surrounding microstructure were defined using electron back scattered diffraction. In contrast to previous models to describe facet formation and early fracture in this class of alloy, basal plane slip systems were not implicated. The use of EBSD to identify “effective structural units” of common orientation, which do not necessarily relate to colony size, will be demonstrated for both the large grained material and a conventional compressor disc alloy Timetal 834 in typical forged condition.</abstract><type>Journal Article</type><journal>International Journal of Fatigue</journal><volume>29</volume><journalNumber>9-11</journalNumber><paginationStart>2015</paginationStart><paginationEnd>2021</paginationEnd><publisher/><placeOfPublication/><isbnPrint/><isbnElectronic/><issnPrint>01421123</issnPrint><issnElectronic/><keywords/><publishedDay>31</publishedDay><publishedMonth>12</publishedMonth><publishedYear>2007</publishedYear><publishedDate>2007-12-31</publishedDate><doi>10.1016/j.ijfatigue.2006.12.011</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>2018-05-11T12:39:14.7621744</lastEdited><Created>2018-05-11T12:39:14.7621744</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>E</firstname><surname>SACKETT</surname><order>1</order></author><author><firstname>L</firstname><surname>GERMAIN</surname><order>2</order></author><author><firstname>M</firstname><surname>BACHE</surname><order>3</order></author><author><firstname>Elizabeth</firstname><surname>Sackett</surname><orcid>0000-0002-5975-6967</orcid><order>4</order></author></authors><documents/><OutputDurs/></rfc1807> |
| spelling |
2018-05-11T12:39:14.7621744 v2 40102 2018-05-11 Crystal plasticity, fatigue crack initiation and fatigue performance of advanced titanium alloys 55d1695a53656de6b0bdfa4c08d8bcd4 0000-0002-5975-6967 Elizabeth Sackett Elizabeth Sackett true false 2018-05-11 MTLS The fatigue behaviour of a novel large grained variant of the near α titanium alloy Ti 685 is described. Load controlled low cycle fatigue fractures in plain cylindrical specimens demonstrate the highly crystallographic nature of the failure process. When compared to similar data for conventional grain size Ti 685 variants the LG685 material clearly offers reduced fatigue and static strength. An alternative flat plate specimen design was employed together with electronic speckle pattern interferometry and strain gauges to monitor the inhomogeneous strain accumulation in this large grained variant under load control conditions. Dwell fatigue tests indicated that the eventual location for crack initiation and subsequent failure could be identified as early as the first loading cycle. The precise crystallographic orientations of the surrounding microstructure were defined using electron back scattered diffraction. In contrast to previous models to describe facet formation and early fracture in this class of alloy, basal plane slip systems were not implicated. The use of EBSD to identify “effective structural units” of common orientation, which do not necessarily relate to colony size, will be demonstrated for both the large grained material and a conventional compressor disc alloy Timetal 834 in typical forged condition. Journal Article International Journal of Fatigue 29 9-11 2015 2021 01421123 31 12 2007 2007-12-31 10.1016/j.ijfatigue.2006.12.011 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2018-05-11T12:39:14.7621744 2018-05-11T12:39:14.7621744 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering E SACKETT 1 L GERMAIN 2 M BACHE 3 Elizabeth Sackett 0000-0002-5975-6967 4 |
| title |
Crystal plasticity, fatigue crack initiation and fatigue performance of advanced titanium alloys |
| spellingShingle |
Crystal plasticity, fatigue crack initiation and fatigue performance of advanced titanium alloys Elizabeth Sackett |
| title_short |
Crystal plasticity, fatigue crack initiation and fatigue performance of advanced titanium alloys |
| title_full |
Crystal plasticity, fatigue crack initiation and fatigue performance of advanced titanium alloys |
| title_fullStr |
Crystal plasticity, fatigue crack initiation and fatigue performance of advanced titanium alloys |
| title_full_unstemmed |
Crystal plasticity, fatigue crack initiation and fatigue performance of advanced titanium alloys |
| title_sort |
Crystal plasticity, fatigue crack initiation and fatigue performance of advanced titanium alloys |
| author_id_str_mv |
55d1695a53656de6b0bdfa4c08d8bcd4 |
| author_id_fullname_str_mv |
55d1695a53656de6b0bdfa4c08d8bcd4_***_Elizabeth Sackett |
| author |
Elizabeth Sackett |
| author2 |
E SACKETT L GERMAIN M BACHE Elizabeth Sackett |
| format |
Journal article |
| container_title |
International Journal of Fatigue |
| container_volume |
29 |
| container_issue |
9-11 |
| container_start_page |
2015 |
| publishDate |
2007 |
| institution |
Swansea University |
| issn |
01421123 |
| doi_str_mv |
10.1016/j.ijfatigue.2006.12.011 |
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Faculty of Science and Engineering |
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|
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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 fatigue behaviour of a novel large grained variant of the near α titanium alloy Ti 685 is described. Load controlled low cycle fatigue fractures in plain cylindrical specimens demonstrate the highly crystallographic nature of the failure process. When compared to similar data for conventional grain size Ti 685 variants the LG685 material clearly offers reduced fatigue and static strength. An alternative flat plate specimen design was employed together with electronic speckle pattern interferometry and strain gauges to monitor the inhomogeneous strain accumulation in this large grained variant under load control conditions. Dwell fatigue tests indicated that the eventual location for crack initiation and subsequent failure could be identified as early as the first loading cycle. The precise crystallographic orientations of the surrounding microstructure were defined using electron back scattered diffraction. In contrast to previous models to describe facet formation and early fracture in this class of alloy, basal plane slip systems were not implicated. The use of EBSD to identify “effective structural units” of common orientation, which do not necessarily relate to colony size, will be demonstrated for both the large grained material and a conventional compressor disc alloy Timetal 834 in typical forged condition. |
| published_date |
2007-12-31T03:51:01Z |
| _version_ |
1763752502227894272 |
| score |
11.01753 |