Microstructural Characteristics and Mechanical Properties of Single-Mode Fiber Laser Lap-Welded Joint in Ti and Al Dissimilar Metals

Lee, Su-Jin; Nakamura, Hiroshi; Kawahito, Yousuke; Katayama, Seiji

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論文情報

タイトル	Microstructural Characteristics and Mechanical Properties of Single-Mode Fiber Laser Lap-Welded Joint in Ti and Al Dissimilar Metals
著者	著者名 Lee, Su-Jin
	著者名 Nakamura, Hiroshi
	NRID 1000070379105 1000070379105 著者名 Kawahito, Yousuke
	NRID 1000010144528 1000010144528 著者名 Katayama, Seiji
キーワード等	Titanium
	Aluminum
	Dissimilar welding
	Single-mode fiber laser
	Intermetallic compound
	welding speed
	Weldability
抄録	Titanium (Ti) and Aluminum (Al) have great differences in lattice structure, melting point, heat conductivity, coefficient of linear expansion, etc., and Ti and Al intermetallic compounds such as Ti3Al, TiAl, TiAl3 are easily formed at the contacting surface between Ti and Al. Thus, welding or joining of Ti and Al is considered to be extremely difficult. Nevertheless, in this study, dissimilar welding of Ti and Al using a single-mode fiber laser with extremely high welding speed was tried, and the microstructural characteristics of the interface zone in the Ti and Al weld were investigated. Especially, full penetration lap welding of Ti and Al was tried with single-mode fiber laser. The strengths of the dissimilar weld were evaluated by the tensile shear test. To recognize the formation of intermetallic phases in the weld fusion zone and the relationship between intermetallic phases and the tensile strength, the lap welded areas of Ti and Al sheets were observed by scanning electron microscope (SEM) and analyzed by using X-ray diffractometer (XRD). The research results suggest a great formation possibility of a strong Ti and Al dissimilar weld with intermetallic compounds reduced by using a single-mode fiber laser under the condition of an extremely high welding speed.
出版者	大阪大学接合科学研究所
	Joining and Welding Research Institute, Osaka University
	オオサカダイガクセツゴウカガクケンキュウジョ
収録物名	Transactions of JWRI
巻	42
号	1
開始ページ	17
終了ページ	21
刊行年月	2013-06
言語	英語
ハンドルURL	https://hdl.handle.net/11094/26600
ISSN	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.42 No.1 (2013-06)

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.42(1) p.17-p.21
DC.title	Microstructural Characteristics and Mechanical Properties of Single-Mode Fiber Laser Lap-Welded Joint in Ti and Al Dissimilar Metals
DC.creator	Lee, Su-Jin
	Nakamura, Hiroshi
	Kawahito, Yousuke
	Katayama, Seiji
DC.publisher	大阪大学接合科学研究所
	Joining and Welding Research Institute, Osaka University
	オオサカダイガクセツゴウカガクケンキュウジョ
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2013-06
DC.subject	Titanium
	Aluminum
	Dissimilar welding
	Single-mode fiber laser
	Intermetallic compound
	welding speed
	Weldability
DCTERMS.abstract	Titanium (Ti) and Aluminum (Al) have great differences in lattice structure, melting point, heat conductivity, coefficient of linear expansion, etc., and Ti and Al intermetallic compounds such as Ti3Al, TiAl, TiAl3 are easily formed at the contacting surface between Ti and Al. Thus, welding or joining of Ti and Al is considered to be extremely difficult. Nevertheless, in this study, dissimilar welding of Ti and Al using a single-mode fiber laser with extremely high welding speed was tried, and the microstructural characteristics of the interface zone in the Ti and Al weld were investigated. Especially, full penetration lap welding of Ti and Al was tried with single-mode fiber laser. The strengths of the dissimilar weld were evaluated by the tensile shear test. To recognize the formation of intermetallic phases in the weld fusion zone and the relationship between intermetallic phases and the tensile strength, the lap welded areas of Ti and Al sheets were observed by scanning electron microscope (SEM) and analyzed by using X-ray diffractometer (XRD). The research results suggest a great formation possibility of a strong Ti and Al dissimilar weld with intermetallic compounds reduced by using a single-mode fiber laser under the condition of an extremely high welding speed.
DC.format	application/pdf
citation_title	Microstructural Characteristics and Mechanical Properties of Single-Mode Fiber Laser Lap-Welded Joint in Ti and Al Dissimilar Metals
citation_author	Lee, Su-Jin
	Nakamura, Hiroshi
	Kawahito, Yousuke
	Katayama, Seiji
citation_publisher	大阪大学接合科学研究所
	Joining and Welding Research Institute, Osaka University
	オオサカダイガクセツゴウカガクケンキュウジョ
citation_language	英語
citation_date	2013-06
citation_journal_title	Transactions of JWRI
citation_volume	42
citation_issue	1
citation_firstpage	17
citation_lastpage	21
citation_issn	03874508
citation_public_url	https://hdl.handle.net/11094/26600

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