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In this study, fatigue tests were conducted on three types of EH36 welded joints, namely T\u2010welded, cruciform welded, and butt\u2010welded joints, at 20\u00b0C and \u221260\u00b0C. Mean\n                    <jats:italic>S\u2010N<\/jats:italic>\n                    curves and\n                    <jats:italic>P\u2010S\u2010N<\/jats:italic>\n                    curves with a 97.5% survival probability were obtained for these joints. The experimental results showed that low temperature significantly increased the yield strength\n                    <jats:italic>\u03c3<\/jats:italic>\n                    <jats:sub>s<\/jats:sub>\n                    and ultimate tensile strength\n                    <jats:italic>\u03c3<\/jats:italic>\n                    <jats:sub>b<\/jats:sub>\n                    of both EH36 base metal and weld metal. The EH36 weld metal exhibited higher\n                    <jats:italic>\u03c3<\/jats:italic>\n                    <jats:sub>s<\/jats:sub>\n                    than the base metal, whereas its total tensile strain at fracture (TTSF) was lower. In addition, the difference in TTSF between the weld metal and base metal decreased as the temperature decreased. Low temperature significantly extended the fatigue lives of the welded joints. Among the three joint types, the butt\u2010welded joints exhibited the best fatigue performance, whereas the cruciform welded joints exhibited the worst. All tested joints showed similar failure characteristics, involving the growth of semi\u2010elliptical surface cracks or multiple semi\u2010elliptical cracks leading to through\u2010thickness fracture. Compared with the DNV\u2010GL design\n                    <jats:italic>S\u2010N<\/jats:italic>\n                    curve, all experimentally fitted\n                    <jats:italic>P\u2010S\u2010N<\/jats:italic>\n                    curves were located above the design curve. These results provide experimental support for the safety assessment of welded structures in polar equipment.\n                  <\/jats:p>","DOI":"10.1002\/qre.70276","type":"journal-article","created":{"date-parts":[[2026,6,1]],"date-time":"2026-06-01T14:41:31Z","timestamp":1780324891000},"page":"2948-2962","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["The Effect of Low Temperature on Fatigue Performance of Typical Welded Joints in Polar Equipment"],"prefix":"10.1002","volume":"42","author":[{"given":"Kaiqing","family":"Qiao","sequence":"first","affiliation":[{"name":"Naval Architecture and Ocean Engineering College Dalian Maritime University  Dalian China"},{"name":"General Technology Group Machine Tool Engineering Research Institute Co., Ltd. Dalian Branch  Dalian China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhijie","family":"Liu","sequence":"additional","affiliation":[{"name":"Naval Architecture and Ocean Engineering College Dalian Maritime University  Dalian China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jianbao","family":"Wei","sequence":"additional","affiliation":[{"name":"Naval Architecture and Ocean Engineering College Dalian Maritime University  Dalian China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-9085-1573","authenticated-orcid":false,"given":"Yuhang","family":"Sun","sequence":"additional","affiliation":[{"name":"Naval Architecture and Ocean Engineering College Dalian Maritime University  Dalian China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaobang","family":"Wang","sequence":"additional","affiliation":[{"name":"Naval Architecture and Ocean Engineering College Dalian Maritime University  Dalian China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rumin","family":"Teng","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering Dalian University of Technology  Dalian China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,6,1]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.56958\/JESI.2020.5.3.8"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijfatigue.2020.105896"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1007\/s13198\u2010011\u20100071\u20108"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.3390\/met12061010"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.5957\/jspd.2016.32.1.1"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.engfailanal.2017.07.026"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.oceaneng.2019.106803"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1111\/ffe.12727"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.engfailanal.2019.07.006"},{"key":"e_1_2_9_11_1","doi-asserted-by":"publisher","DOI":"10.1080\/17445302.2011.563550"},{"key":"e_1_2_9_12_1","doi-asserted-by":"publisher","DOI":"10.3390\/met8090657"},{"key":"e_1_2_9_13_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF03249483"},{"key":"e_1_2_9_14_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.marstruc.2021.103153"},{"key":"e_1_2_9_15_1","doi-asserted-by":"publisher","DOI":"10.3390\/met13091563"},{"key":"e_1_2_9_16_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.marstruc.2021.103075"},{"key":"e_1_2_9_17_1","doi-asserted-by":"publisher","DOI":"10.1080\/17445302.2018.1463609"},{"key":"e_1_2_9_18_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.oceaneng.2023.113651"},{"key":"e_1_2_9_19_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11804\u2010022\u201000301\u2010x"},{"key":"e_1_2_9_20_1","doi-asserted-by":"publisher","DOI":"10.3390\/ma18194515"},{"key":"e_1_2_9_21_1","doi-asserted-by":"publisher","DOI":"10.3390\/met14040476"},{"key":"e_1_2_9_22_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijfatigue.2024.108572"},{"key":"e_1_2_9_23_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jmrt.2025.02.061"},{"key":"e_1_2_9_24_1","unstructured":"S.Herion High Strength Steels for Jack\u2010up Rigs. 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