Performance enhancement of Co-based alloy tool for friction stir welding of ferritic steel

Yutaka Sato, Masahiro Miyake, Shinichi Susukida, Hiroyuki Kokawa, Toshihiro Omori, Kiyohito Ishida, Shinya Imano, Seung Hwan C Park, Itto Sugimoto, Satoshi Hirancr

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

2 Citations (Scopus)

Abstract

Co-based alloy tools having the γ/γ′ microstructure with distribution of hard phases hardly experience large deformation and severe wear during friction stir welding (FSW) of ferritic steels at the welding temperature lower than the γ′-solvus. Further examinations implied that the tool wear were suppressed more effectively on Co-based alloy tool with larger volume fraction of hard phases with average size of 2 to 5 μn. In this study, Co-based alloy tools with different volume fractions of hard phases were designed, and effect of hard phases on tool wear was examined in FSW of 0.45% carbon steel. FSW trial showed that the tool wear decreased with increasing volume fraction of hard phases. At the volume fraction of 36%, the wear volume was successfully reduced to two third of that of the tool exhibiting the good wear resistance in a previous study. This study showed a possibility that the tool performance is effectively enhanced by further microstructure optimization of the tool material.

Original languageEnglish
Title of host publicationTMS Annual Meeting
PublisherMinerals, Metals and Materials Society
Pages39-46
Number of pages8
Volume2015-January
ISBN (Print)9781119082491
Publication statusPublished - 2015
EventFriction Stir Welding and Processing VIII - TMS 2015 144th Annual Meeting and Exhibition - Orlando, United States
Duration: 2015 Mar 152015 Mar 19

Other

OtherFriction Stir Welding and Processing VIII - TMS 2015 144th Annual Meeting and Exhibition
CountryUnited States
CityOrlando
Period15/3/1515/3/19

Keywords

  • Co-based alloy
  • Ferritic steel
  • Friction stir welding
  • Welding tool

ASJC Scopus subject areas

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

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  • Cite this

    Sato, Y., Miyake, M., Susukida, S., Kokawa, H., Omori, T., Ishida, K., Imano, S., Park, S. H. C., Sugimoto, I., & Hirancr, S. (2015). Performance enhancement of Co-based alloy tool for friction stir welding of ferritic steel. In TMS Annual Meeting (Vol. 2015-January, pp. 39-46). Minerals, Metals and Materials Society.