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jwri36_02_081
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論文情報
タイトル
Residual Stress of Steels for Structure and Filet Weld Zone after Laser Peening
著者
Sakino, Yoshihiro
Sakino, Yoshihiro
Sano, Yuji
Sano, Yuji
Kim, You-Chul
Kim, You-Chul
キーワード等
Laser Peening
Residual Stress
Fillet Weld
Steel for Structures
Vickers Hardness
抄録
Laser peening is an innovative surface enhancement technology to introduce a compressive residual stress in metallic materials. Experimental results showed that laser peening was effective in preventing SCC and enhancing fatigue strength. However the effects of laser peening on steels for structure and their welded zone are not completely clarified. In this paper, laser peening conditions for four grades of steels for structure were examined. Moreover residual stress of the fillet weld zone after laser peening was investigated by comparing it with that before laser peening. X-ray diffraction was used to measure the residual stress. Main results are summarized as follows. 1) Laser peening affects steel hardness up to the depth of 0.6mm. 2) Laser peening conditions for over 400kN/㎟ grade steels were selected as 200 mJ laser pulse energy, 8 ns pulse duration, 0.8 mm spot diameter and 3600 pulse/㎠ irradiation pulse density. 3) Laser peening can change tensile residual stress to large compressive residual stress in the welding zone. The nearer to the welding toe, the larger this effect by laser peening became.
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
36
号
2
開始ページ
81
終了ページ
86
刊行年月
2007-12
ISSN
03874508
NCID
AA00867058
URL
http://hdl.handle.net/11094/10451
言語
英語
カテゴリ
紀要論文 Departmental Bulletin Paper
Transactions of JWRI / Vol.36 No.2 (2007-12)
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text
DCTERMS.bibliographicCitation
Transactions of JWRI.36(2) P.81-P.86
DC.title
Residual Stress of Steels for Structure and Filet Weld Zone after Laser Peening
DC.creator
Sakino, Yoshihiro
Sano, Yuji
Kim, You-Chul
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
2007-12
DC.identifier" scheme="DCTERMS.URI
http://hdl.handle.net/11094/10451
DC.subject
Laser Peening
Residual Stress
Fillet Weld
Steel for Structures
Vickers Hardness
DCTERMS.abstract
Laser peening is an innovative surface enhancement technology to introduce a compressive residual stress in metallic materials. Experimental results showed that laser peening was effective in preventing SCC and enhancing fatigue strength. However the effects of laser peening on steels for structure and their welded zone are not completely clarified. In this paper, laser peening conditions for four grades of steels for structure were examined. Moreover residual stress of the fillet weld zone after laser peening was investigated by comparing it with that before laser peening. X-ray diffraction was used to measure the residual stress. Main results are summarized as follows. 1) Laser peening affects steel hardness up to the depth of 0.6mm. 2) Laser peening conditions for over 400kN/㎟ grade steels were selected as 200 mJ laser pulse energy, 8 ns pulse duration, 0.8 mm spot diameter and 3600 pulse/㎠ irradiation pulse density. 3) Laser peening can change tensile residual stress to large compressive residual stress in the welding zone. The nearer to the welding toe, the larger this effect by laser peening became.
citation_title
Residual Stress of Steels for Structure and Filet Weld Zone after Laser Peening
citation_author
Sakino, Yoshihiro
Sano, Yuji
Kim, You-Chul
citation_publisher
大阪大学接合科学研究所
citation_language
英語
citation_date
2007-12
citation_journal_title
Transactions of JWRI
citation_volume
36
citation_issue
2
citation_firstpage
81
citation_lastpage
86
citation_issn
03874508
citation_public_url
http://hdl.handle.net/11094/10451
citation_keywords
Laser Peening
Residual Stress
Fillet Weld
Steel for Structures
Vickers Hardness