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.

本文采用自冲铆接 (SPR) 和摩擦自冲铆接 (F-SPR) 工艺连接铝合金 AA5182-O 板材。进行了平行研究，以在接头宏观几何形状、加工力、显微硬度、准静态机械性能和疲劳行为方面比较这两个过程。结果表明，F-SPR工艺形成了铆-片联锁和片-片固态结合，而SPR工艺仅包含铆-片联锁。对于相同的铆钉扩口，由于摩擦热的软化作用和 F-SPR 较低的铆钉硬度，F-SPR 工艺所需的模具力比 SPR 工艺少 63%。F-SPR 开关深度的减小导致铆钉周围的铝合金更加硬化。