Mechanical Properties of B1500HS/AA5052 Joints by Self-Piercing Riveting

Abstract

Self-piercing riveting (SPR) is a suitable technology to join various materials and has attracted more attention in the automotive industry. In this work, the effects of forming parameters on the forming qualities and mechanical properties of B1500HS steel/AA5052 aluminum alloy SPR joints were analyzed. The results show that the sheet stack sequence has little influence on the peak tensile load and rigidity of SPR joints. When the steel sheet is placed on the aluminum sheet, the failure displacement, energy absorption, and ductility factor are, respectively, 2.77, 2.13, and 2.28 times larger than those of the joints with the aluminum sheet placed on the steel sheet. The SPR joints with steel sheets placed on aluminum sheets have better mechanical stability. Meanwhile, when the steel sheet is placed on the aluminum sheet, the fatigue life of the joint can be increased by about 98.4%, 88.3%, and 118.1%, respectively, under high, medium, and low fatigue loads. A joint with opposite riveting direction has the optimal fatigue performance and the fatigue life is 1.64 and 2.14 times those of the other two-rivet joints. Generally, the fatigue fractures of aluminum alloy sheets in SPR joints occurred in fatigue tests. The fatigue fracture of a joint with a steel sheet stacked on an aluminum sheet extends uni-directionally to the edge of the sheet from the riveting point, while a symmetric fatigue crack of aluminum occurs for joints with the opposite sequence. The distribution of fatigue cracks is related to fatigue load, and fatigue cracks mainly originate in the fretting wear area of the contact interface between the rivet leg, upper sheet, and lower sheet.

Lightweight simulation design of integrated die-casting body rear wheel cover and seat crossbeam

“…Assuming that the liquid metal is an incompressible fluid and ignores the influence of turbulence, the process can be described by the volume function, continuity, energy conservation equation, and the dynamic theory of the liquid particle solidification process [9][10] . In this paper, the MAGMA software is used to analyze the mode flow [11] . Due to the wide size of the casting, to prevent strain and deformation of the thin area of the wheel cover during the mold opening process, the largest surface of the casting profile was selected as the die joint.…”

Corrosion behavior of riveted joints with electrophoretic treatment in neutral salt spray environment

“…In addition, they reported that the peak shear load of the SPR joint increased with the rise of sheet width and rivet end distance. Zhang et al [24] explored the impacts of sheet stacking sequence on the mechanical properties of SPR joints in B1500HS steel/AA5052 aluminum alloys. They proved that the failure displacement, energy absorption, and ductility factor of the SPR joints with steel sheet placed on the aluminum sheet were more than twice those with opposite riveting direction.…”