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論文情報
タイトル
Buttwelding of Mg-Cu-Gd Bulk Metallic Glass using a High-brightness Fiber Laser
著者
Terajima, Takeshi
Terajima, Takeshi
Kimura, Hisamichi
Kimura, Hisamichi
Inoue, Akihisa
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.
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
39
号
1
開始ページ
61
終了ページ
64
刊行年月
2010-09
ISSN
03874508
NCID
AA00867058
URL
http://hdl.handle.net/11094/8220
言語
英語
カテゴリ
紀要論文 Departmental Bulletin Paper
Transactions of JWRI / Vol.39 No.1 (2010-09)
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著者版フラグ
publisher
NII資源タイプ
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text
DCTERMS.bibliographicCitation
Transactions of JWRI.39(1) P.61-P.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
DC.language" scheme="DCTERMS.RFC1766
英語
DCTERMS.issued" scheme="DCTERMS.W3CDTF
2010-09
DC.identifier" scheme="DCTERMS.URI
http://hdl.handle.net/11094/8220
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.
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_issn
03874508
citation_public_url
http://hdl.handle.net/11094/8220
citation_keywords
Mg-based metallic glass
fiber laser
buttwelding