Microstructure and properties of friction stir welded 1.3wt% n containing steel

Yutaka S. Sato, Kei Nakamura, Hiroyuki Kokawa, Shuji Narita, Tetsuya Shimizu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

In this study, FSW was applied to a high nitrogen steel (HNS) containing 1.3wt% nitrogen using a PCBN tool, and feasibility of FSW for HNS, and microstructure and properties of the weld were examined. FSW produced defect-free welds in the HNS at several welding parameters. The stir zone had roughly the same nitrogen content as the base material, which suggested that both the PCBN tool wear and the nitrogen desorption hardly occurred during FSW. FSW refined the grain structure in the stir zone, which resulted in the higher hardness than the base material. Simultaneously, FSW resulted in rapid formation of Cr2N precipitates on the grain boundaries in the stir zone, which caused reduction of the corrosion resistance. This study showed that FSW is an effective method to produce a defect-free weld with high hardness in the HNS, although the corrosion resistance of the stir zone is reduced.

Original languageEnglish
Title of host publicationFriction Stir Welding and Processing V - Proceedings of Symposia held during TMS 2009 Annual Meeting and Exhibition
Pages67-73
Number of pages7
Publication statusPublished - 2009 Mar 30
EventFriction Stir Welding and Processing V -TMS 2009 Annual Meeting and Exhibition - San Francisco, CA, United States
Duration: 2009 Feb 152009 Feb 19

Publication series

NameTMS Annual Meeting

Other

OtherFriction Stir Welding and Processing V -TMS 2009 Annual Meeting and Exhibition
CountryUnited States
CitySan Francisco, CA
Period09/2/1509/2/19

Keywords

  • Friction stir welding
  • High nitrogen steel
  • Microstructure
  • Property

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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  • Cite this

    Sato, Y. S., Nakamura, K., Kokawa, H., Narita, S., & Shimizu, T. (2009). Microstructure and properties of friction stir welded 1.3wt% n containing steel. In Friction Stir Welding and Processing V - Proceedings of Symposia held during TMS 2009 Annual Meeting and Exhibition (pp. 67-73). (TMS Annual Meeting).