| タイトル |
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en
Fatigue strength improvement method for thin sheet GMA welding joints by weaving
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| 作成者 |
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en
Matsuda, Kazuki
ja
松田, 和貴
ja-Kana
マツダ, カズキ
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ORCID 0000-0003-3227-8413
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所属
en
Kyushu University
ja
九州大学
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en
Ishida, Yoshinari
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所属
en
Nippon Steel Corporation
ja
日本製鉄株式会社
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en
Kodama, Shinji
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所属
en
Nippon Steel Corporation
ja
日本製鉄株式会社
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| アクセス権 |
open access |
| 主題 |
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Other
en
Weaving
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Other
en
microcracks
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Other
en
lap fillet welding joint
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Other
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GMA welding
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Other
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fatigue
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Other
en
hot-rolled steel sheet
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| 内容注記 |
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Abstract
en
A method for improving the fatigue strength of thin steel sheet gas metal arc (GMA) welded joints using weaving welding was evaluated. Weaving created peaks and valleys at the weld toe. The valley has high stress triaxiality, and plastic deformation is unlikely to occur. Fatigue cracks occurred from the peaks with gentle toe shapes. Therefore, it is considered that the fatigue strength is improved by reducing the initiation points of the crack and stress concentration at the toe. The fatigue test results showed that the fatigue limit of the weaving welding joint was improved compared with that of the normal welding joint. Furthermore, the optimal weaving condition, which is the relationship between the weaving wavelength and torch swing amplitude, was evaluated. As a consequence, when the wave density is small, the crack initiation point is not restricted to the peak. On the other hand, when the wave density is large, the peak and valley shapes merge and the weaving effect disappears. In addition, undercuts occurred when the swing amplitude became too large. The mechanism of improving the fatigue strength was considered by observing the initiation point of the fatigue microcracks.
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| 出版者 |
en
Springer
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| 日付 |
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| 言語 |
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| 資源タイプ |
journal article |
| 出版タイプ |
AM |
| 資源識別子 |
HDL
https://hdl.handle.net/2324/6758694
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| 関連 |
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isVersionOf
DOI
https://doi.org/10.1007/s40194-023-01480-z
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| 収録誌情報 |
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PISSN
0043-2288
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EISSN
1878-6669
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NCID
AA00887226
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en
Welding in the World
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| ファイル |
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| コンテンツ更新日時 |
2024-02-03 |
