Fatigue Cyclic Testing of the ITER CS Inlets
ITER Central Solenoid (CS) is cooled by injecting supercritical helium at the inner diameter (ID), an area with the highest stress. The jacket near the helium inlet is the weakest structural element of the ITER CS due to the high stress concentration. To verify adequate mechanical performance of the...
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| Veröffentlicht in: | IOP conference series. Materials Science and Engineering 2019-04, Vol.502 (1), p.12189 |
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| container_title | IOP conference series. Materials Science and Engineering |
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| creator | Martovetsky, Nicolai Walsh, Robert Freudenberg, Kevin Reiersen, Wayne Everitt, David McRae, Dustin Myatt, Leonard Cochran, Kristine Jong, Cornelis |
| description | ITER Central Solenoid (CS) is cooled by injecting supercritical helium at the inner diameter (ID), an area with the highest stress. The jacket near the helium inlet is the weakest structural element of the ITER CS due to the high stress concentration. To verify adequate mechanical performance of the inlets, we made six full-scale specimens and subjected them to relevant cycling loading in liquid nitrogen to assess the operational margin of the inlets. To increase fatigue life of the inlets, we used a treatment called ultrasonic peening (UP). This treatment allows for the creation of a compressive residual stress at the surface of the jacket with the highest stress, which significantly delays initiation of the fatigue crack. For comparison purposes, one of the samples was intentionally not UP treated. Test results showed significant advantages of the UP treatment and demonstrated sufficient life to support the ITER CS mission. |
| doi_str_mv | 10.1088/1757-899X/502/1/012189 |
| format | Article |
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The jacket near the helium inlet is the weakest structural element of the ITER CS due to the high stress concentration. To verify adequate mechanical performance of the inlets, we made six full-scale specimens and subjected them to relevant cycling loading in liquid nitrogen to assess the operational margin of the inlets. To increase fatigue life of the inlets, we used a treatment called ultrasonic peening (UP). This treatment allows for the creation of a compressive residual stress at the surface of the jacket with the highest stress, which significantly delays initiation of the fatigue crack. For comparison purposes, one of the samples was intentionally not UP treated. Test results showed significant advantages of the UP treatment and demonstrated sufficient life to support the ITER CS mission.</description><identifier>ISSN: 1757-8981</identifier><identifier>ISSN: 1757-899X</identifier><identifier>EISSN: 1757-899X</identifier><identifier>DOI: 10.1088/1757-899X/502/1/012189</identifier><language>eng</language><publisher>Bristol: IOP Publishing</publisher><subject>Compressive properties ; Crack initiation ; Crack propagation ; Fatigue failure ; Fatigue life ; Fatigue tests ; Helium ; Inlets ; Liquid nitrogen ; Mechanical properties ; Residual stress ; Solenoids ; Stress concentration ; Structural members</subject><ispartof>IOP conference series. Materials Science and Engineering, 2019-04, Vol.502 (1), p.12189</ispartof><rights>Published under licence by IOP Publishing Ltd</rights><rights>2019. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c434t-d014b24677d5a47d8b27ccfb855d5769c38542a6467934152107111aec37ef373</citedby><cites>FETCH-LOGICAL-c434t-d014b24677d5a47d8b27ccfb855d5769c38542a6467934152107111aec37ef373</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1088/1757-899X/502/1/012189/pdf$$EPDF$$P50$$Giop$$Hfree_for_read</linktopdf><link.rule.ids>230,309,314,776,780,785,881,23910,27903,27904,38847,38869,53819,53846</link.rule.ids><backlink>$$Uhttps://www.osti.gov/servlets/purl/1649641$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Martovetsky, Nicolai</creatorcontrib><creatorcontrib>Walsh, Robert</creatorcontrib><creatorcontrib>Freudenberg, Kevin</creatorcontrib><creatorcontrib>Reiersen, Wayne</creatorcontrib><creatorcontrib>Everitt, David</creatorcontrib><creatorcontrib>McRae, Dustin</creatorcontrib><creatorcontrib>Myatt, Leonard</creatorcontrib><creatorcontrib>Cochran, Kristine</creatorcontrib><creatorcontrib>Jong, Cornelis</creatorcontrib><creatorcontrib>Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)</creatorcontrib><title>Fatigue Cyclic Testing of the ITER CS Inlets</title><title>IOP conference series. Materials Science and Engineering</title><addtitle>IOP Conf. Ser.: Mater. Sci. Eng</addtitle><description>ITER Central Solenoid (CS) is cooled by injecting supercritical helium at the inner diameter (ID), an area with the highest stress. The jacket near the helium inlet is the weakest structural element of the ITER CS due to the high stress concentration. To verify adequate mechanical performance of the inlets, we made six full-scale specimens and subjected them to relevant cycling loading in liquid nitrogen to assess the operational margin of the inlets. To increase fatigue life of the inlets, we used a treatment called ultrasonic peening (UP). This treatment allows for the creation of a compressive residual stress at the surface of the jacket with the highest stress, which significantly delays initiation of the fatigue crack. For comparison purposes, one of the samples was intentionally not UP treated. Test results showed significant advantages of the UP treatment and demonstrated sufficient life to support the ITER CS mission.</description><subject>Compressive properties</subject><subject>Crack initiation</subject><subject>Crack propagation</subject><subject>Fatigue failure</subject><subject>Fatigue life</subject><subject>Fatigue tests</subject><subject>Helium</subject><subject>Inlets</subject><subject>Liquid nitrogen</subject><subject>Mechanical properties</subject><subject>Residual stress</subject><subject>Solenoids</subject><subject>Stress concentration</subject><subject>Structural members</subject><issn>1757-8981</issn><issn>1757-899X</issn><issn>1757-899X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>O3W</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNqFkE1Lw0AQhhdRsFb_ggS9eDBmZ79zlNBqoSLYCt6WdLNpU2o2ZtND_70bIoogeJqBed7h5UHoEvAdYKUSkFzGKk3fEo5JAgkGAio9QqPvw_H3ruAUnXm_xVhIxvAI3U7zrlrvbZQdzK4y0dL6rqrXkSujbmOj2XLyEmWLaFbvbOfP0UmZ77y9-Jpj9DqdLLPHeP78MMvu57FhlHVxgYGtCBNSFjxnslArIo0pV4rzgkuRGqo4I7kIREoZcAJYAkBuDZW2pJKO0dXw14Uy2puqs2ZjXF1b02kQLBUMAnQ9QE3rPvahtt66fVuHXppwgVOOFe0pMVCmdd63ttRNW73n7UED1r0-3ZvRvSUd9GnQg74QJEOwcs3P539DN3-EnhaTX5huipJ-AjVleoA</recordid><startdate>20190401</startdate><enddate>20190401</enddate><creator>Martovetsky, Nicolai</creator><creator>Walsh, Robert</creator><creator>Freudenberg, Kevin</creator><creator>Reiersen, Wayne</creator><creator>Everitt, David</creator><creator>McRae, Dustin</creator><creator>Myatt, Leonard</creator><creator>Cochran, Kristine</creator><creator>Jong, Cornelis</creator><general>IOP Publishing</general><scope>O3W</scope><scope>TSCCA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>L6V</scope><scope>M7S</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>OIOZB</scope><scope>OTOTI</scope></search><sort><creationdate>20190401</creationdate><title>Fatigue Cyclic Testing of the ITER CS Inlets</title><author>Martovetsky, Nicolai ; 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| subjects | Compressive properties Crack initiation Crack propagation Fatigue failure Fatigue life Fatigue tests Helium Inlets Liquid nitrogen Mechanical properties Residual stress Solenoids Stress concentration Structural members |
| title | Fatigue Cyclic Testing of the ITER CS Inlets |
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