樹脂／金属異材接合体の強度特性に及ぼす樹脂の機械的性質の変化の影響

抄録

It has been reported that the joint strength of resin/metal dissimilar materials joint changed depending on the environmental condition. Moreover, the mechanical properties of the resin are possible to change due to heating during the joining process or environmental effect in the service condition. The strength of the dissimilar materials joint can be affected by the change in interfacial strength itself and change in the mechanical property of resin too. In this study, the effect of heat treatment on the mechanical property of resin material and the effect of the change in the mechanical property of resin on the interfacial strength of the dissimilar materials joint were investigated. Tensile strengths of resin materials were affected by heat treatment. In case of PA66 (Polyamide), the tensile behavior changed significantly from ductile to brittle with an increase of heat treatment time. According to FT-IR result, the chemical bond might be changed before and after heat treatment. The indentation test was conducted to evaluate the peeling force of the interface in dissimilar materials adhesive joint between PA66 and A5052. The maximum load corresponding to delamination decreased with an increase in heat treatment time of resin.