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.

提议将摩擦搅拌点焊接（FSSW）和自动式骑行（SPR）的集成的一步摩擦焊接焊接（FSWR）工艺（SPR）加入7系列铝合金。使用iNprocess摩擦加热和高速骑行搅拌以防止裂纹缺陷，通过动态重结晶实现细晶粒的加强，并形成具有固态粘结和④机械互锁的混合接头。这项研究阐明了摩擦热和铆钉的控制机制，并在上述四个关键特征上搅动。此外，进行了多尺度强度评估模型和微型拉伸测试，以阐明FSWR接头整体机械性能的四个关键特征的混合加强机制。

项目成果

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

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）

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

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

Elucidation of intermetallic compounds and mechanical properties of dissimilar friction stir lap welded 5052 Al alloy and DP590 steel

• DOI: 10.1016/j.jallcom.2022.164381
• 发表时间: 2022-03-06
• 期刊: JOURNAL OF ALLOYS AND COMPOUNDS
• 影响因子: 6.2
• 作者: Geng, Peihao;Morimura, Masashi;Qin, Guoliang
• 通讯作者: Qin, Guoliang