Dynamic thermo-mechanical phenomenon and multi-scale strengthening mechanism during friction stir weld-riveting process

搅拌摩擦焊铆接过程中的动态热力现象及多尺度强化机制

• 批准号: 21K14439
• 负责人: 馬 運五
• 金额: $ 3万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-01 至 2022-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21K14439/
• 关键词: 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

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 and④mechanical 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.

提出了一种将搅拌摩擦点焊(FSSW)和自冲铆接(SPR)相结合的一步法连接7种铝合金的工艺。采用在线摩擦加热和高速铆钉搅拌，1防止裂纹缺陷，2通过动态再结晶实现细晶强化，形成3固相结合4机械联锁的混杂接头。本研究阐明了摩擦、发热和铆钉搅拌对上述四个关键特性的控制机理。此外，通过多尺度强度评估模型和微型拉伸试验，阐明了四个关键特征对FSWR节点整体力学性能的混合强化机理。

项目成果

Shanghai Jiao Tong University/Shandong University/Harbin Institute of Technology(中国)

上海交通大学/山东大学/哈尔滨工业大学（中国）

Effect of Adhesive Application on Friction Self-Piercing Riveting (F-SPR) Process of AA7075-T6 Aluminum Alloy

• DOI: 10.1016/j.jmatprotec.2021.117336
• 发表时间: 2022
• 期刊: Journal of Materials Processing Technology
• 影响因子: 6.3
• 作者: Bingxin Yang;H. Shan;Ying Liang;Yunwu Ma;S. Niu;Xiaobo Zhu;Yongbing Li

Flat friction spot joining of aluminum alloy to carbon fiber reinforced polymer sheets: Experiment and simulation

• DOI: 10.1016/j.jmst.2021.08.043
• 发表时间: 2022-04-30
• 期刊: JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
• 影响因子: 10.9
• 作者: Geng, Peihao;Ma, Ninshu;Fujii, Hidetoshi
• 通讯作者: Fujii, Hidetoshi

Effects of rotation tool-induced heat and material flow behaviour on friction stir lapped Al/steel joint formation and resultant microstructure

• DOI: 10.1016/j.ijmachtools.2022.103858
• 发表时间: 2022-02-01
• 期刊: INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
• 影响因子: 14
• 作者: Geng, Peihao;Ma, Yunwu;Chen, Chuantong
• 通讯作者: Chen, Chuantong

鋼/CFRP 重ね継手の組織と強度に及ぼすレーザ溶接熱量の影響

激光焊接热量对钢/CFRP搭接接头结构和强度的影响

• 发表时间: 2022
• 作者: 馬運五; 夏鴻博; 麻寧緒
• 通讯作者: 麻寧緒