Development of a cobalt-based alloy FSW tool for high-softening-temperature materials

Yutaka Sato; Masahiro Miyake; Hiroyuki Kokawa; Toshihiro Omori; Kiyohito Ishida; Shinya Imano; Seung Hwan C. Park; Satoshi Hirano

Development of a cobalt-based alloy FSW tool for high-softening-temperature materials

Yutaka Sato, Masahiro Miyake, Hiroyuki Kokawa, Toshihiro Omori, Kiyohito Ishida, Shinya Imano, Seung Hwan C. Park, Satoshi Hirano

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

15 Citations (Scopus)

Abstract

The authors have developed a new friction stir welding (FSW) tool that enables welding of high-softening-temperature materials, such as steels, and titanium alloys. The new tool is made of a Co-based alloy strengthened by precipitating intermetallics, Co₃(Al,W), with an Ll2 structure at high temperatures. The Co-based alloy tool can be manufactured at a low cost through a simple production method consisting of casting, heat-treatment, and then machining. It exhibits yield strengths higher than 500 MPa at 1000°C, so that it might have great potential as a FSW tool for high-softening- temperature materials. In this study, the feasibility to use the Co-based alloy tool to friction stir weld various high-softening-temperature materials was examined. Changes in tool shape during FSW and the weld appearances produced with the Co-based alloy tool will be briefly shown.

Original language	English
Title of host publication	Friction Stir Welding and Processing VI - Held During the TMS 2011 Annual Meeting and Exhibition
Pages	3-9
Number of pages	7
Publication status	Published - 2011 Jul 27
Event	Friction Stir Welding and Processing VI - Held During the TMS 2011 Annual Meeting and Exhibition - San Diego, CA, United States Duration: 2011 Feb 27 → 2011 Mar 3

Publication series

Name	TMS Annual Meeting

Other

Other	Friction Stir Welding and Processing VI - Held During the TMS 2011 Annual Meeting and Exhibition
Country	United States
City	San Diego, CA
Period	11/2/27 → 11/3/3

Keywords

Co-based alloy
Friction stir welding
Steels
Ti alloys
Tool

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys

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Development of a cobalt-based alloy FSW tool for high-softening-temperature materials. / Sato, Yutaka; Miyake, Masahiro; Kokawa, Hiroyuki; Omori, Toshihiro; Ishida, Kiyohito; Imano, Shinya; Park, Seung Hwan C.; Hirano, Satoshi.

Friction Stir Welding and Processing VI - Held During the TMS 2011 Annual Meeting and Exhibition. 2011. p. 3-9 (TMS Annual Meeting).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Sato, Y, Miyake, M, Kokawa, H, Omori, T, Ishida, K, Imano, S, Park, SHC & Hirano, S 2011, Development of a cobalt-based alloy FSW tool for high-softening-temperature materials. in Friction Stir Welding and Processing VI - Held During the TMS 2011 Annual Meeting and Exhibition. TMS Annual Meeting, pp. 3-9, Friction Stir Welding and Processing VI - Held During the TMS 2011 Annual Meeting and Exhibition, San Diego, CA, United States, 11/2/27.

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abstract = "The authors have developed a new friction stir welding (FSW) tool that enables welding of high-softening-temperature materials, such as steels, and titanium alloys. The new tool is made of a Co-based alloy strengthened by precipitating intermetallics, Co3(Al,W), with an Ll2 structure at high temperatures. The Co-based alloy tool can be manufactured at a low cost through a simple production method consisting of casting, heat-treatment, and then machining. It exhibits yield strengths higher than 500 MPa at 1000°C, so that it might have great potential as a FSW tool for high-softening- temperature materials. In this study, the feasibility to use the Co-based alloy tool to friction stir weld various high-softening-temperature materials was examined. Changes in tool shape during FSW and the weld appearances produced with the Co-based alloy tool will be briefly shown.",

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author = "Yutaka Sato and Masahiro Miyake and Hiroyuki Kokawa and Toshihiro Omori and Kiyohito Ishida and Shinya Imano and Park, {Seung Hwan C.} and Satoshi Hirano",

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AU - Omori, Toshihiro

AU - Ishida, Kiyohito

AU - Imano, Shinya

AU - Park, Seung Hwan C.

AU - Hirano, Satoshi

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N2 - The authors have developed a new friction stir welding (FSW) tool that enables welding of high-softening-temperature materials, such as steels, and titanium alloys. The new tool is made of a Co-based alloy strengthened by precipitating intermetallics, Co3(Al,W), with an Ll2 structure at high temperatures. The Co-based alloy tool can be manufactured at a low cost through a simple production method consisting of casting, heat-treatment, and then machining. It exhibits yield strengths higher than 500 MPa at 1000°C, so that it might have great potential as a FSW tool for high-softening- temperature materials. In this study, the feasibility to use the Co-based alloy tool to friction stir weld various high-softening-temperature materials was examined. Changes in tool shape during FSW and the weld appearances produced with the Co-based alloy tool will be briefly shown.

AB - The authors have developed a new friction stir welding (FSW) tool that enables welding of high-softening-temperature materials, such as steels, and titanium alloys. The new tool is made of a Co-based alloy strengthened by precipitating intermetallics, Co3(Al,W), with an Ll2 structure at high temperatures. The Co-based alloy tool can be manufactured at a low cost through a simple production method consisting of casting, heat-treatment, and then machining. It exhibits yield strengths higher than 500 MPa at 1000°C, so that it might have great potential as a FSW tool for high-softening- temperature materials. In this study, the feasibility to use the Co-based alloy tool to friction stir weld various high-softening-temperature materials was examined. Changes in tool shape during FSW and the weld appearances produced with the Co-based alloy tool will be briefly shown.

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