Preprints of the National Meeting of JWS
Preprints of the National Meeting of JWS
Session ID : 203
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Host: Japan Welding Society

Microstructure Control of Friction Stir Welded Carbon Steel Joints with Liquid CO2
*Hidetoshi Fujii, Rintaro Ueji, Takahiro Tatsuno, Takuya Tsumura, Kazuhiro Nakata, Kiyoshi Nogi
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Keywords: Liquid CO2, Rapid cooling, FSW, Microstructure, Martensite
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Abstract
3.2mm S45C carbon steel plates were friction stir welded using liquid CO2. Because the liquid CO2 increases the cooling rate and then quantity of Martensite, the joint strength increases. However, any significant effect of liquid CO2 was observed at a 25mm/min welding speed.
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© 2008 by Japan Welding Society
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