Fundamental Study for the Relationship between Melt Flow and Spatter in High-Power Laser Welding of Pure Titanium

Kawahito, Yousuke; Katayama, Seiji; Nakamura, Hiroshi

doi:https://doi.org/10.18910/57270

アクセス数:190件（2024-04-18 14:24 集計）

固定URL: https://doi.org/10.18910/57270

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タイトル	Fundamental Study for the Relationship between Melt Flow and Spatter in High-Power Laser Welding of Pure Titanium
著者	NRID 1000070379105 1000070379105 著者名 Kawahito, Yousuke
	NRID 1000010144528 1000010144528 著者名 Katayama, Seiji
	著者名 Nakamura, Hiroshi
キーワード等	Laser welding
	Melt flow
	Spatter
	Pure titanium
	X-ray transmission observation
抄録	The objectives of this study is to clarify the rerationship between melt flow and spatters ejected from a molten pool during 10 kW laser welding of a pure titanium plate. Three-dimensional X-ray transmission in-situobservation of the weld molten pool with tungsten carbide tracers revealed that the melt flowed mainly along the bottom of the molten pool from the keyhole tip to the rear part and then from the rear to the front near the surface of the molten pool, while the melt in front of a keyhole flowed upwards along the keyhole wall at a velocity of less than 0.6m/s and then was accelerated to 2.1m/s at the height of about 2 mm above the keyhole inlet. One-way upward melt flows were continuously piled up at the tip of the elongated melt, resulting in spattering as droplets from the molten pool. Moreover, about 80% of spatters were generated from 50-100mm/s to 300 mm/s, the ratio and the size of spatters occurring from the rear part of a keyhole increased from 20% to 80% and became smaller than 1 mm.
出版者	大阪大学接合科学研究所
	オオサカダイガクセツゴウカガクケンキュウジョ
	Joining and Welding Research Institute, Osaka University
収録物名	Transactions of JWRI
巻(号)	44(2)
ページ	27-32
刊行年月	2015-12
言語	英語
ハンドルURL	https://hdl.handle.net/11094/57270
DOI	https://doi.org/10.18910/57270
PISSN	03874508
NCID	AA00867058
アクセス権	open access
出版タイプ	Version of Record
カテゴリ	紀要論文 Departmental Bulletin Paper
カテゴリ	Transactions of JWRI / Vol.44 No.2 (2015-12)

資源タイプ	紀要論文
ローカル資源タイプ	紀要論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Transactions of JWRI. 2015, 44(2), p. 27-32
DC.title	Fundamental Study for the Relationship between Melt Flow and Spatter in High-Power Laser Welding of Pure Titanium
DC.creator	Kawahito, Yousuke
	Katayama, Seiji
	Nakamura, Hiroshi
DC.publisher	大阪大学接合科学研究所
	オオサカダイガクセツゴウカガクケンキュウジョ
	Joining and Welding Research Institute, Osaka University
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2015-12
DC.subject	Laser welding
	Melt flow
	Spatter
	Pure titanium
	X-ray transmission observation
DCTERMS.abstract	The objectives of this study is to clarify the rerationship between melt flow and spatters ejected from a molten pool during 10 kW laser welding of a pure titanium plate. Three-dimensional X-ray transmission in-situobservation of the weld molten pool with tungsten carbide tracers revealed that the melt flowed mainly along the bottom of the molten pool from the keyhole tip to the rear part and then from the rear to the front near the surface of the molten pool, while the melt in front of a keyhole flowed upwards along the keyhole wall at a velocity of less than 0.6m/s and then was accelerated to 2.1m/s at the height of about 2 mm above the keyhole inlet. One-way upward melt flows were continuously piled up at the tip of the elongated melt, resulting in spattering as droplets from the molten pool. Moreover, about 80% of spatters were generated from 50-100mm/s to 300 mm/s, the ratio and the size of spatters occurring from the rear part of a keyhole increased from 20% to 80% and became smaller than 1 mm.
DC.identifier	10.18910/57270
DC.format	application/pdf
citation_title	Fundamental Study for the Relationship between Melt Flow and Spatter in High-Power Laser Welding of Pure Titanium
citation_author	Kawahito, Yousuke
	Katayama, Seiji
	Nakamura, Hiroshi
citation_publisher	大阪大学接合科学研究所
	オオサカダイガクセツゴウカガクケンキュウジョ
	Joining and Welding Research Institute, Osaka University
citation_language	英語
citation_date	2015-12
citation_journal_title	Transactions of JWRI
citation_volume	44
citation_issue	2
citation_firstpage	27
citation_lastpage	32
citation_public_url	https://hdl.handle.net/11094/57270
citation_doi_detail	10.18910/57270
citation_doi	https://doi.org/10.18910/57270

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