Friction stir welding of steels using a tool made of iridium-containing nickel base superalloy

Tatsuya Nakazawa; Yutaka Sato; Hiroyuki Kokawa; Kiyohito Ishida; Toshihiro Omori; Kunihiro Tanaka; Koichi Sakairi

doi:10.1007/978-3-319-48173-9_8

Friction stir welding of steels using a tool made of iridium-containing nickel base superalloy

Tatsuya Nakazawa, Yutaka Sato, Hiroyuki Kokawa, Kiyohito Ishida, Toshihiro Omori, Kunihiro Tanaka, Koichi Sakairi

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

3 Citations (Scopus)

Abstract

An addition of Ir to Ni base super alloy can increase the high temperature strength. An Ircontaining Ni base superalloy produced through a process of rapid solidification casting, solution heat treatment and subsequent aging was found to exhibit a compressive strength greater than 500 MPa at 1000°C, which suggested it would be a suitable material to use in a friction stir welding (FSW) tool for high-softening-temperature materials, such as stainless steels and carbon steels. Precision tilt casting of this Ir-containing Ni base superalloy into a copper mold followed by appropriate heat treatment, resulted in tools with a fine γ/γ' microstructure containing intergranular carbides. These tools were subsequently proven capable of producing welds on AISI 304 stainless steel and ultrahigh carbon steel without large deformation or severe wear.

Original language	English
Title of host publication	Friction Stir Welding and Processing VIII
Publisher	Springer International Publishing
Pages	77-82
Number of pages	6
ISBN (Electronic)	9783319481739
ISBN (Print)	9781119082491
DOIs	https://doi.org/10.1007/978-3-319-48173-9_8
Publication status	Published - 2016 Jan 1

Keywords

Friction stir welding
Ir-containing ni base superalloy
Mechanical properties
Microstructure
Stainless steel

ASJC Scopus subject areas

Engineering(all)
Materials Science(all)

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Friction stir welding of steels using a tool made of iridium-containing nickel base superalloy. / Nakazawa, Tatsuya; Sato, Yutaka; Kokawa, Hiroyuki; Ishida, Kiyohito; Omori, Toshihiro; Tanaka, Kunihiro; Sakairi, Koichi.

Friction Stir Welding and Processing VIII. Springer International Publishing, 2016. p. 77-82.

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

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AU - Nakazawa, Tatsuya

AU - Sato, Yutaka

AU - Kokawa, Hiroyuki

AU - Ishida, Kiyohito

AU - Omori, Toshihiro

AU - Tanaka, Kunihiro

AU - Sakairi, Koichi

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AB - An addition of Ir to Ni base super alloy can increase the high temperature strength. An Ircontaining Ni base superalloy produced through a process of rapid solidification casting, solution heat treatment and subsequent aging was found to exhibit a compressive strength greater than 500 MPa at 1000°C, which suggested it would be a suitable material to use in a friction stir welding (FSW) tool for high-softening-temperature materials, such as stainless steels and carbon steels. Precision tilt casting of this Ir-containing Ni base superalloy into a copper mold followed by appropriate heat treatment, resulted in tools with a fine γ/γ' microstructure containing intergranular carbides. These tools were subsequently proven capable of producing welds on AISI 304 stainless steel and ultrahigh carbon steel without large deformation or severe wear.

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KW - Microstructure

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