| 研究課題/領域番号 |
21K14439
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| 研究種目 |
若手研究
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| 配分区分 | 基金 |
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| 審査区分 |
小区分26050:材料加工および組織制御関連
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| 研究機関 | 大阪大学 |
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研究代表者 |
馬 運五 大阪大学, 接合科学研究所, 特任助教(常勤) (00870601)
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| 研究期間 (年度) |
2021-04-01 – 2022-03-31
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| 研究課題ステータス |
中途終了 (2021年度)
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| 配分額 *注記 |
4,680千円 (直接経費: 3,600千円、間接経費: 1,080千円)
2022年度: 2,340千円 (直接経費: 1,800千円、間接経費: 540千円)
2021年度: 2,340千円 (直接経費: 1,800千円、間接経費: 540千円)
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| キーワード | Friction stir / Riveting / Aluminum alloy / Solid-state joining / Multi-scale enhance / Miniature tensile test / solid-state bonding / thermo-mechanical model / multi-scale modeling / fine grain strengthening / defect-free joining |
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| 研究開始時の研究の概要 |
An integrated one-step friction stir weld-riveting (FSWR) process combining friction stir spot welding (FSSW) and self-piercing riveting (SPR) is proposed to join high-strength aluminum alloy. Using inprocess friction heating and high-speed rivet stirring to prevent crack defect, achieve fine grain strengthening by dynamic recrystallization, and form a hybrid joint with solid-state bonding and mechanical interlock.
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| 研究実績の概要 |
An integrated one-step friction stir weld-riveting (FSWR) process combining friction stir spot welding (FSSW) and self-piercing riveting (SPR) is proposed to join 7 series aluminum alloys. Using inprocess friction heating and high-speed rivet stirring to ①prevent crack defect, achieve ②fine grain strengthening via dynamic recrystallization, and form a hybrid joint with ③solid-state bonding and
④mechanical interlock. This research elucidates the control mechanisms of friction heat and rivet stirring on the above four key features. In addition, multi-scale strength evaluation models and miniature tensile tests were performed to clarify the hybrid strengthening mechanisms of the four key features on the overall mechanical performance of the FSWR joints.
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