Effect of oxygen in shielding gas on weldability in plasma-GMA hybrid welding process of high-tensile strength steel

Trinh, Quang Ngoc; Tashiro, Shinichi; Suga, Tetsuo; Yamaoka, Hiroto; Inose, Kotaro; Watanabe, Kosuke; Hyoma, Kengo; Tanabe, Yoshihiro; Bui, Van Hanh; Tanaka, Manabu

doi:https://doi.org/10.1007/s00170-024-14100-x

Effect of oxygen in shielding gas on weldability in plasma-GMA hybrid welding process of high-tensile strength steel

Trinh, Quang Ngoc; Tashiro, Shinichi; Suga, Tetsuo et al.

International Journal of Advanced Manufacturing Technology, 2024, 134(1-2), 283-296

Number of Access:53（2025-05-15 15:21 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/98101

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Title	Effect of oxygen in shielding gas on weldability in plasma-GMA hybrid welding process of high-tensile strength steel
Creator	CreatorName Trinh, Quang Ngoc
	NRID 1000070432424 1000070432424 researchmap permalink d8dshw3z d8dshw3z Scopus Author ID 15833130200 15833130200 CreatorName Tashiro, Shinichi
	NRID 1000010863102 1000010863102 researchmap permalink TS2529 TS2529 CreatorName Suga, Tetsuo
	CreatorName Yamaoka, Hiroto
	CreatorName Inose, Kotaro
	CreatorName Watanabe, Kosuke
	CreatorName Hyoma, Kengo
	CreatorName Tanabe, Yoshihiro
	CreatorName Bui, Van Hanh
	NRID 1000020243272 1000020243272 researchmap permalink read0014392 read0014392 Scopus Author ID 25641191700 25641191700 CreatorName Tanaka, Manabu
Subject	Gas composition
	High-tensile strength steel
	Oxygen
	Plasma keyhole
	Plasma-GMA hybrid welding
	Shielding gas
	Surface tension
Description	The version of record of this article, first published in International Journal of Advanced Manufacturing Technology, is available online at Publisher’s website: https://doi.org/10.1007/s00170-024-14100-x.
Abstract	This study aims to clarify the effect of oxygen in shielding gas on weldability in the plasma-GMA (Gas Metal Arc) hybrid welding process of high-tensile strength steel plates. The difference in keyhole profile and bead formation, when the GMA shielding gas was pure Ar, Ar + 2% O₂ or Ar + 20% CO₂, was investigated for plate thicknesses of 6 and 9 mm for the first time. It was found that the weld beads were in good condition for 6 mm thickness plates for all shielding gases, which implied that the window of welding conditions for this thickness is wide. In contrast, for 9 mm thickness plates, a fully penetrated weld bead was achieved only in Ar + 20% CO₂, and weld bead penetration in Ar + 20% CO₂ is higher than in pure Ar and Ar + 2% O₂ in the same welding condition. Due to decreased surface tension caused by sufficiently increased oxygen absorbed into the weld pool, the keyhole diameter increased to penetrate the bottom side of the plate, and the depressing weld pool surface under GMA allowed the heat input from the GMA to be directly applied to a deeper position. Consequently, the plasma-GMA hybrid welding process with Ar + 20% CO₂ achieved a complete penetration for a plate of 9 mm thickness, owing to the effects of both phenomena. It proved a potential to increase penetrability in welding thicker plates by controlling oxygen content in shielding gas of GMA adequately.
Publisher	Springer Science and Business Media Deutschland GmbH
Source Title	International Journal of Advanced Manufacturing Technology
Volume (Issue)	134(1-2)
Page	283-296
Date of Issued	2024-09-01
Language	English
Handle URL	https://hdl.handle.net/11094/98101
PISSN	02683768
eISSN	14333015
Relation.isIdenticalTo	DOI (Publisher Version) https://doi.org/10.1007/s00170-024-14100-x
Access Rights	open access
CopyRight	This article is licensed under a Creative Commons Attribution 4.0 International License.
oaire:version	Version of Record
Category	学術雑誌論文 Journal Article

Resource Type	journal article
Local Type	Journal Article
DCTERMS.bibliographicCitation	International Journal of Advanced Manufacturing Technology. 2024, 134(1-2), p. 283-296
DC.title	Effect of oxygen in shielding gas on weldability in plasma-GMA hybrid welding process of high-tensile strength steel
DC.creator	Trinh, Quang Ngoc
	Tashiro, Shinichi
	Suga, Tetsuo
	Yamaoka, Hiroto
	Inose, Kotaro
	Watanabe, Kosuke
	Hyoma, Kengo
	Tanabe, Yoshihiro
	Bui, Van Hanh
	Tanaka, Manabu
DC.publisher	Springer Science and Business Media Deutschland GmbH
DC.language' scheme='DCTERMS.RFC1766	English
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2024-09-01
DC.identifier	https://doi.org/10.1007/s00170-024-14100-x
DC.subject	Gas composition
	High-tensile strength steel
	Oxygen
	Plasma keyhole
	Plasma-GMA hybrid welding
	Shielding gas
	Surface tension
DC.description	The version of record of this article, first published in International Journal of Advanced Manufacturing Technology, is available online at Publisher’s website: https://doi.org/10.1007/s00170-024-14100-x.
DCTERMS.abstract	This study aims to clarify the effect of oxygen in shielding gas on weldability in the plasma-GMA (Gas Metal Arc) hybrid welding process of high-tensile strength steel plates. The difference in keyhole profile and bead formation, when the GMA shielding gas was pure Ar, Ar + 2% O₂ or Ar + 20% CO₂, was investigated for plate thicknesses of 6 and 9 mm for the first time. It was found that the weld beads were in good condition for 6 mm thickness plates for all shielding gases, which implied that the window of welding conditions for this thickness is wide. In contrast, for 9 mm thickness plates, a fully penetrated weld bead was achieved only in Ar + 20% CO₂, and weld bead penetration in Ar + 20% CO₂ is higher than in pure Ar and Ar + 2% O₂ in the same welding condition. Due to decreased surface tension caused by sufficiently increased oxygen absorbed into the weld pool, the keyhole diameter increased to penetrate the bottom side of the plate, and the depressing weld pool surface under GMA allowed the heat input from the GMA to be directly applied to a deeper position. Consequently, the plasma-GMA hybrid welding process with Ar + 20% CO₂ achieved a complete penetration for a plate of 9 mm thickness, owing to the effects of both phenomena. It proved a potential to increase penetrability in welding thicker plates by controlling oxygen content in shielding gas of GMA adequately.
DC.rights	This article is licensed under a Creative Commons Attribution 4.0 International License.
DC.format	98101
citation_title	Effect of oxygen in shielding gas on weldability in plasma-GMA hybrid welding process of high-tensile strength steel
citation_author	Trinh, Quang Ngoc
	Tashiro, Shinichi
	Suga, Tetsuo
	Yamaoka, Hiroto
	Inose, Kotaro
	Watanabe, Kosuke
	Hyoma, Kengo
	Tanabe, Yoshihiro
	Bui, Van Hanh
	Tanaka, Manabu
citation_publisher	Springer Science and Business Media Deutschland GmbH
citation_language	English
citation_date	2024-09-01
citation_journal_title	International Journal of Advanced Manufacturing Technology
citation_volume	134
citation_issue	1-2
citation_firstpage	283
citation_lastpage	296
citation_doi	https://doi.org/10.1007/s00170-024-14100-x
citation_public_url	https://hdl.handle.net/11094/98101

Effect of oxygen in shielding gas on weldability in plasma-GMA hybrid welding process of high-tensile strength steel

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