Buttwelding of Mg-Cu-Gd Bulk Metallic Glass using a High-brightness Fiber Laser

Terajima, Takeshi; Kimura, Hisamichi; Inoue, Akihisa

doi:https://doi.org/10.18910/8220

Buttwelding of Mg-Cu-Gd Bulk Metallic Glass using a High-brightness Fiber Laser

Terajima, Takeshi; Kimura, Hisamichi; Inoue, Akihisa

Transactions of JWRI, 2010, 39(1), 61-64

アクセス数:341件（2025-05-31 14:02 集計）

固定URL: https://doi.org/10.18910/8220

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論文情報

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タイトル	Buttwelding of Mg-Cu-Gd Bulk Metallic Glass using a High-brightness Fiber Laser
著者	NRID 1000010402992 1000010402992 著者名 Terajima, Takeshi
	NRID 1000000161571 1000000161571 著者名 Kimura, Hisamichi
	NRID 1000010108566 1000010108566 著者名 Inoue, Akihisa
キーワード等	Mg-based metallic glass
	fiber laser
	buttwelding
抄録	The light metal based metallic glass Mg₆₅Cu₅₅Gd₁₀ has low specific gravity and excellent mechanical properties and thus is expected to be a useful structural material. However, welding of Mg₆₅Cu₂₅Gd₁₀ is difficult since it immediately crystallizes if the quench rate is lower than the critical value. In this study, a high-brightness fiber laser with an ultrahigh power density of several megawatts per square millimeter, which corresponds to the power density of an electron beam and is a well suited for this purpose, is examined for welding Mg₆₅Cu₅₅Gd₁₀. The laser beam was transmitted through an optical fiber and focused on the butt surface of the Mg₆₅Cu₂₅Gd₁₀ rods that were synchronously rotated at 3000 rpm at 0.5 MPa. The molten alloy that forms following laser irradiation was extruded from the joint, and the specimens were successfully welded. The microstructure observed by micro-focus X-ray diffraction showed that the crystalline phase was not present inside the joint but was in the extruded region. The success of the proposed welding is likely attributable to the pressure applied to the specimens, which plays an important role in extruding the crystalline phase from the joint.
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)	39(1)
ページ	61-64
刊行年月	2010-09
言語	英語
ハンドルURL	https://hdl.handle.net/11094/8220
DOI	https://doi.org/10.18910/8220
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.39 No.1 (2010-09)

論文詳細を表示

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. 2010, 39(1), p. 61-64
DC.title	Buttwelding of Mg-Cu-Gd Bulk Metallic Glass using a High-brightness Fiber Laser
DC.creator	Terajima, Takeshi
	Kimura, Hisamichi
	Inoue, Akihisa
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	2010-09
DC.subject	Mg-based metallic glass
	fiber laser
	buttwelding
DCTERMS.abstract	The light metal based metallic glass Mg₆₅Cu₅₅Gd₁₀ has low specific gravity and excellent mechanical properties and thus is expected to be a useful structural material. However, welding of Mg₆₅Cu₂₅Gd₁₀ is difficult since it immediately crystallizes if the quench rate is lower than the critical value. In this study, a high-brightness fiber laser with an ultrahigh power density of several megawatts per square millimeter, which corresponds to the power density of an electron beam and is a well suited for this purpose, is examined for welding Mg₆₅Cu₅₅Gd₁₀. The laser beam was transmitted through an optical fiber and focused on the butt surface of the Mg₆₅Cu₂₅Gd₁₀ rods that were synchronously rotated at 3000 rpm at 0.5 MPa. The molten alloy that forms following laser irradiation was extruded from the joint, and the specimens were successfully welded. The microstructure observed by micro-focus X-ray diffraction showed that the crystalline phase was not present inside the joint but was in the extruded region. The success of the proposed welding is likely attributable to the pressure applied to the specimens, which plays an important role in extruding the crystalline phase from the joint.
DC.identifier	10.18910/8220
DC.format	8220
citation_title	Buttwelding of Mg-Cu-Gd Bulk Metallic Glass using a High-brightness Fiber Laser
citation_author	Terajima, Takeshi
	Kimura, Hisamichi
	Inoue, Akihisa
citation_publisher	大阪大学接合科学研究所
citation_language	英語
citation_date	2010-09
citation_journal_title	Transactions of JWRI
citation_volume	39
citation_issue	1
citation_firstpage	61
citation_lastpage	64
citation_public_url	https://hdl.handle.net/11094/8220
citation_doi_detail	10.18910/8220
citation_doi	https://doi.org/10.18910/8220