Residual Stress of Steels for Structure and Filet Weld Zone after Laser Peening

Sakino, Yoshihiro; Sano, Yuji; Kim, You-Chul

doi:https://doi.org/10.18910/10451

このアイテムのアクセス数:104件（2023-09-30 03:01 集計）

このアイテムへのリンクには次のURLをご利用ください: https://doi.org/10.18910/10451

このアイテムへのリンクには次のURLをご利用ください: https://hdl.handle.net/11094/10451

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タイトル	Residual Stress of Steels for Structure and Filet Weld Zone after Laser Peening
著者	NRID 1000080273712 1000080273712 著者名 Sakino, Yoshihiro
	NRID 1000000399792 1000000399792 著者名 Sano, Yuji
	NRID 1000020144529 1000020144529 著者名 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.
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)	36(2)
ページ	81-86
刊行年月	2007-12
言語	英語
ハンドルURL	https://hdl.handle.net/11094/10451
DOI	https://doi.org/10.18910/10451
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.36 No.2 (2007-12)

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. 2007, 36(2), p. 81-86
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
	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	2007-12
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.
DC.identifier	10.18910/10451
DC.format	application/pdf
citation_doi	https://doi.org/10.18910/10451
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
	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
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_public_url	https://hdl.handle.net/11094/10451
citation_doi_detail	10.18910/10451

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