Microstructure and Hardness Distribution of Friction Stir Welded 1050 Al and IF Steel with Different Original Grain Size

Sun, Yufeng; Fujii, Hidetoshi; Takada, Yutaka; Tsuji, Nobuhiro; Nakata, Kazuhiro; Nogi, Kiyoshi

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タイトル	Microstructure and Hardness Distribution of Friction Stir Welded 1050 Al and IF Steel with Different Original Grain Size
著者	Sun, Yufeng Sun, Yufeng
	Fujii, Hidetoshi Fujii, Hidetoshi
	Takada, Yutaka Takada, Yutaka
	Tsuji, Nobuhiro Tsuji, Nobuhiro
	Nakata, Kazuhiro Nakata, Kazuhiro
	Nogi, Kiyoshi Nogi, Kiyoshi
キーワード等	Friction stir welding
	Accumulative roll bonding
	Ultrafine grained structure
	Vickers hardness
抄録	In this study, 2mm-thick commercial 1050-Al plates and IF steel plates with three different kinds of original grain size were subjected to the friction stir welding process. These three kinds of samples with different grain sizes were obtained by accumulative roll bonding after a 5 cycles process, 5 cycles ARB process plus annealing and fully annealing, respectively. The microstructure evolution and Vickers hardness in the stir zone of all the samples were investigated. For both 1050-Al and IF steel, the ARB plus annealed samples with an intermediate original grain size finally produced the most refined microstructure and highest Vickers hardness in the stir zone. While for the ARB processed samples with ultrafine grained structure, significant grain growth and decrease in hardness occurred in the stir zone. The microstructure coarsening in the stir zone is suggested to be caused by the heating of the unstable structure in the ultrafine grained materials during friction stir welding process.
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	38
号	2
開始ページ	43
終了ページ	48
刊行年月	2009-12
ISSN	03874508
NCID	AA00867058
URL	http://hdl.handle.net/11094/4695
言語	英語

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.38(2) P.43-P.48
DC.title	Microstructure and Hardness Distribution of Friction Stir Welded 1050 Al and IF Steel with Different Original Grain Size
DC.creator	Sun, Yufeng
	Fujii, Hidetoshi
	Takada, Yutaka
	Tsuji, Nobuhiro
	Nakata, Kazuhiro
	Nogi, Kiyoshi
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	2009-12
DC.identifier" scheme="DCTERMS.URI	http://hdl.handle.net/11094/4695
DC.subject	Friction stir welding
	Accumulative roll bonding
	Ultrafine grained structure
	Vickers hardness
DCTERMS.abstract	In this study, 2mm-thick commercial 1050-Al plates and IF steel plates with three different kinds of original grain size were subjected to the friction stir welding process. These three kinds of samples with different grain sizes were obtained by accumulative roll bonding after a 5 cycles process, 5 cycles ARB process plus annealing and fully annealing, respectively. The microstructure evolution and Vickers hardness in the stir zone of all the samples were investigated. For both 1050-Al and IF steel, the ARB plus annealed samples with an intermediate original grain size finally produced the most refined microstructure and highest Vickers hardness in the stir zone. While for the ARB processed samples with ultrafine grained structure, significant grain growth and decrease in hardness occurred in the stir zone. The microstructure coarsening in the stir zone is suggested to be caused by the heating of the unstable structure in the ultrafine grained materials during friction stir welding process.
citation_title	Microstructure and Hardness Distribution of Friction Stir Welded 1050 Al and IF Steel with Different Original Grain Size
citation_author	Sun, Yufeng
	Fujii, Hidetoshi
	Takada, Yutaka
	Tsuji, Nobuhiro
	Nakata, Kazuhiro
	Nogi, Kiyoshi
citation_publisher	大阪大学接合科学研究所
citation_language	英語
citation_date	2009-12
citation_journal_title	Transactions of JWRI
citation_volume	38
citation_issue	2
citation_firstpage	43
citation_lastpage	48
citation_issn	03874508
citation_public_url	http://hdl.handle.net/11094/4695
citation_keywords	Friction stir welding
	Accumulative roll bonding
	Ultrafine grained structure
	Vickers hardness

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