Friction-stir-welding of thick carbon steels using co-based alloy tool

Itto Sugimoto, Akihiro Sato, Seung Hwan C. Park, Satoshi Hirano, Shinya Imano, Yutaka S. Sato, Hiroyuki Kokawa, Toshihiro Omori, Kiyohito Ishida

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)


Friction-stir-welding (FSW) is a solid-phase joining process, and many studies on the application to structural steels have been published. In this study, FSW of thick carbon steel was conducted using heat-resistant moldable Co-based alloy tools. In the weld trials, acceptable appearances were created using a tool with a probe shorter than 9 mm, while a tool with a 12-mm long probe could not successfully weld the materials. The stir zone (SZ) had slightly higher hardness than the base material and fine grains of less than 10 µm in diameter. Comparing the different tool geometries, the tool with 3-flats and a step spiral embedded in the probe effectively reduced the output power of the motor for tool rotation.

Original languageEnglish
Title of host publicationFriction Stir Welding and Processing VII
PublisherSpringer International Publishing
Number of pages6
ISBN (Electronic)9783319481081
ISBN (Print)9781118605783
Publication statusPublished - 2016 Jan 1


  • Carbon steels
  • Co-based alloy
  • Friction-stir-welding
  • Tool

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)


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