A comparison of double sided friction stir welding in air and underwater for 6mm S275 steel plate

Philip Baillie, Stuart Campbell, Alexander Galloway, Stephen R. Cater, Norman McPherson

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This study compared the mechanical and microstructural properties produced during friction stir welding (FSW) of S275 structural steel in air and underwater. Post weld tests assessed the tensile strength, micro-hardness, distortion, Charpy
impact toughness and fatigue performance in each case. The study showed that there was no significant difference in the strength, hardness or fatigue life of the air and underwater specimens. However, Charpy impact toughness was shown to decrease for the underwater specimens and was attributed to a lower degree of recrystallization caused by the higher rate of heat loss experienced when welding underwater. Reduced angular and longitudinal distortion was observed in the underwater welded plate compared to the plate welded in air.
Original languageEnglish
Pages (from-to)651-655
Number of pages5
JournalInternational Journal of Chemical, Nuclear, Metallurgical and Materials Engineering
Issue number8
Publication statusPublished - 7 Aug 2014
EventInternational Conference on Materials and Product Technology, ICMPT 14 - Venice, Italy
Duration: 14 Aug 201415 Aug 2014



  • Charpy impact toughness
  • distortion
  • fatigue
  • friction stir welding (FSW)
  • micro-hardness
  • underwater

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