Effect of Die on Forming and Microstructure of Steel/Aluminum Self-piercing Riveting
The DC04 steel plate with a thickness of 1 mm and the AA6061-T6 aluminum alloy with a thickness of 2 mm were used as riveting objects.The effects of three types of die on the mechanical properties and microstructure of steel/aluminum self-piercing riveting joints were studied by means of finite element simulation,statics test,metallographic phase,scanning electron microscopy,and hard-ness test.The experimental results show that the positions of equivalent stress and equivalent plastic strain of the three types of die riveting samples are roughly the same.The head height,minimum bottom thickness,and internal locking value of boss die riveting sample are 0.18 mm,0.59 mm,and 1.09 mm,respectively,highly consistent with the simulation accuracy.The maximum load force of the three types of die measured by tensile test is 2.89 kN,3.14 kN,and 3.37 kN,respectively.The boss die riveting sample has higher strength and load carrying capacity.The macroscopic failure mode of the die riveting joint is the tearing failure of the upper substrate.The hardness value of boss die joints is slightly higher than that of the base metal itself,and it is more obvious at the rivet pin.
self-piercing rivetingnumerical simulationstatics testhardness test
万方数据
维普
