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論文情報
タイトル
Residual Stresses in Flash Butt Welded Rail
著者
Cal, Zhipeng
Cal, Zhipeng
Nawafune, Masashi
Nawafune, Masashi
Ma, Ninshu
Ma, Ninshu
Qu, Yuebo
Qu, Yuebo
Cao, Bin
Cao, Bin
Murakawa, Hidekazu
Murakawa, Hidekazu
キーワード等
Flash butt welding
U71Mn Rail
Residual Stress
Phase Transformation
Measurement
FEM Simulation
抄録
The residual stresses on the surface of a rail joined by flash-butt welding are measured using a hole-drilling method and the thermal elastic-plastic deformation process considering the phase transformation are simulated using FEM code JWRIAN. The residual stresses measured by experiments and computed by FEM have an acceptable agreement in accuracy. The simulation results show that the phase transformation in the cooling stage has a significant effect on the residual stress distribution and its values. The tensile or compressive state for residual stresses near the welding section strongly depends on the phase transformation which occurred during the cooling process. The biaxial tensile stresses are produced at the web near the fusion line of the flash butt welded rail. The biaxial tensile stresses increase the risk of cracks. Although the Martensite phase transformation during the cooling process at top and bottom near the fusion line produces compressive stress, it increases the brittleness at the same time. Therefore, the proper heat treatment after welding is still necessary in order to improve the toughness.
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
40
号
1
開始ページ
79
終了ページ
87
刊行年月
2011-06
ISSN
03874508
NCID
AA00867058
URL
http://hdl.handle.net/11094/4606
言語
英語
カテゴリ
紀要論文 Departmental Bulletin Paper
Transactions of JWRI / Vol.40 No.1 (2011-06)
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text
DCTERMS.bibliographicCitation
Transactions of JWRI.40(1) P.79-P.87
DC.title
Residual Stresses in Flash Butt Welded Rail
DC.creator
Cal, Zhipeng
Nawafune, Masashi
Ma, Ninshu
Qu, Yuebo
Cao, Bin
Murakawa, Hidekazu
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
2011-06
DC.identifier" scheme="DCTERMS.URI
http://hdl.handle.net/11094/4606
DC.subject
Flash butt welding
U71Mn Rail
Residual Stress
Phase Transformation
Measurement
FEM Simulation
DCTERMS.abstract
The residual stresses on the surface of a rail joined by flash-butt welding are measured using a hole-drilling method and the thermal elastic-plastic deformation process considering the phase transformation are simulated using FEM code JWRIAN. The residual stresses measured by experiments and computed by FEM have an acceptable agreement in accuracy. The simulation results show that the phase transformation in the cooling stage has a significant effect on the residual stress distribution and its values. The tensile or compressive state for residual stresses near the welding section strongly depends on the phase transformation which occurred during the cooling process. The biaxial tensile stresses are produced at the web near the fusion line of the flash butt welded rail. The biaxial tensile stresses increase the risk of cracks. Although the Martensite phase transformation during the cooling process at top and bottom near the fusion line produces compressive stress, it increases the brittleness at the same time. Therefore, the proper heat treatment after welding is still necessary in order to improve the toughness.
citation_title
Residual Stresses in Flash Butt Welded Rail
citation_author
Cal, Zhipeng
Nawafune, Masashi
Ma, Ninshu
Qu, Yuebo
Cao, Bin
Murakawa, Hidekazu
citation_publisher
大阪大学接合科学研究所
citation_language
英語
citation_date
2011-06
citation_journal_title
Transactions of JWRI
citation_volume
40
citation_issue
1
citation_firstpage
79
citation_lastpage
87
citation_issn
03874508
citation_public_url
http://hdl.handle.net/11094/4606
citation_keywords
Flash butt welding
U71Mn Rail
Residual Stress
Phase Transformation
Measurement
FEM Simulation