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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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	Lee, Su-Jin Lee, Su-Jin
	Nakamura, Hiroshi Nakamura, Hiroshi
	Kawahito, Yousuke Kawahito, Yousuke
	Katayama, Seiji 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.
公開者	大阪大学接合科学研究所
公開者の別表記	Joining and Welding Research Institute, Osaka University
公開者 (ヨミ)	オオサカダイガクセツゴウカガクケンキュウジョ
掲載誌名	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
ISSN	03874508
NCID	AA00867058
URL	http://hdl.handle.net/11094/26600
言語	英語
カテゴリ	紀要論文 Departmental Bulletin Paper
カテゴリ	Transactions of JWRI / Vol.42 No.1 (2013-06)

著者版フラグ	publisher
NII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
DC.language" scheme="DCTERMS.RFC1766	英語
DCTERMS.issued" scheme="DCTERMS.W3CDTF	2013-06
DC.identifier" scheme="DCTERMS.URI	http://hdl.handle.net/11094/26600
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.
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
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	http://hdl.handle.net/11094/26600
citation_keywords	Titanium
	Aluminum
	Dissimilar welding
	Single-mode fiber laser
	Intermetallic compound
	welding speed
	Weldability

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