Friction Stir Welding of Ultrafine Grained Interstitial Free Steels

Hidetoshi Fujii; Rintaro Ueji; Yutaka Takada; Hiromoto Kitahara; Nobuhiro Tsuji; Kazuhiro Nakata; Kiyoshi Nogi

doi:10.2320/matertrans.47.239

Hidetoshi Fujii, Rintaro Ueji, Yutaka Takada, Hiromoto Kitahara, Nobuhiro Tsuji, Kazuhiro Nakata, Kiyoshi Nogi

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Keywords: friction stir welding, accumulative roll bonding, steel, ultrafine grained microstructure

JOURNAL FREE ACCESS

2006 Volume 47 Issue 1 Pages 239-242

DOI https://doi.org/10.2320/matertrans.47.239

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Abstract

Friction stir welding (FSW) was applied to ultra low-carbon interstitial free steels with mean grain sizes ranging from 0.7 μm, prepared by accumulative roll-bonding, to 27 μm. The steel with the intermediate grain size (1.8 μm) is most preferable for obtaining the highest hardness in the stir zone with the smallest grain size.

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