Preprints of the National Meeting of JWS
Preprints of the National Meeting of JWS
Session ID : 114
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Host: Japan Welding Society

Formation mechanism of plate-like imperfection in partial penetration laser weld
Fundamental Study of Remote Laser Welding -3
*Yasunobu Miyazaki, Seiji Katayama
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Keywords: Laser welding, Remote welding, Plume, Solidigication crack, Hot crack, Blowhole
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Abstract
Many plate-like imperfections are detected by radiographic inspection of partial penetration laser weld which are formed without co-axial shielding or side shielding in imagining remote laser welding. These imperfections are formed in weld metal. Oxide film is observed on fractured surface of these imperfections. Then, a part of at least these imperfections are supposed to be not hot cracks but plate-like blow holes.
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© 2011 by Japan Welding Society
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