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

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

研究成果: Conference contribution

4 被引用数 (Scopus)

抄録

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.

本文言語English
ホスト出版物のタイトルFriction Stir Welding and Processing V - Proceedings of Symposia held during TMS 2009 Annual Meeting and Exhibition
ページ67-73
ページ数7
出版ステータスPublished - 2009 3 30
イベントFriction Stir Welding and Processing V -TMS 2009 Annual Meeting and Exhibition - San Francisco, CA, United States
継続期間: 2009 2 152009 2 19

出版物シリーズ

名前TMS 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

ASJC Scopus subject areas

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

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