A Comparative Study of Friction Self-Piercing Riveting and Self-Piercing Riveting of Aluminum Alloy AA5182-O

• 作者: Yunwu Ma He Shan Sizhe Niu Yongbing Li Zhongqin Lin Ninshu Ma
• 来源期刊: 工程（英文）
• 年，卷（期）: 2021,（12）
• 所属期刊栏目: High Performance Manufacturing—Article
• 页码范围: 1741-1750
• 页数: 10页
• 语种: 英文

摘要

In this paper,self-piercing riveting(SPR)and friction self-piercing riveting(F-SPR)processes were employed to join aluminum alloy AA5182-O sheets.Parallel studies were carried out to compare the two processes in terms of joint macrogeometry,tooling force,microhardness,quasi-static mechanical performance,and fatigue behavior.The results indicate that the F-SPR process formed both rivet-sheet interlocking and sheet-sheet solid-state bonding,whereas the SPR process only contained rivet-sheet interlocking.For the same rivet flaring,the F-SPR process required 63％less tooling force than the SPR process because of the softening effect of frictional heat and the lower rivet hardness of F-SPR.The decrease in the switch depth of the F-SPR resulted in more hardening of the aluminum alloy surrounding the rivet.The higher hardness of aluminum and formation of solid-state bonding enhanced the F-SPR joint stiffness under lap-shear loading,which contributed to the higher quasi-static lap-shear strength and longer fatigue life compared to those of the SPR joints.