对复合铸造法制成的钢/锌层状复合材料在不同条件下的单向拉伸和低周疲劳实验进行了研究。结果表明:锌的加入使钢/锌复合材料的塑性得到提高,同时其强度与钢相比有所降低。在单向拉伸条件下,拉伸速度对钢/锌复合材料试样的应力-应变曲线影响不大。在±0.5%,±1.0%,±1.5%应变范围内,所对应的拉压应力随着循环次数的增多而增大,表明材料出现循环硬化行为,并且循环应变的提高使材料的循环硬化行为逐渐明显,进一步循环使拉压应力趋于稳定。

Steel/zinc laminated composites were fabricated by casting technique.Uniaxial tension and low cycle fatigue tests under different conditions were investigated. The results showed that the UTS(Ultimate Tensile Strength)of composites under tension decreased because of the fracture of zinc.Tensile speed had nearly no influence on the stress-strain curve of composites.The stresses at maximum strains of ±0.5%,±1.0% and±1.5% increased with increasing number of cycles,suggesting a cyclic hardening process.The phenomenon of cyclic hardening was more prominent with increasing cyclic strain.The stresses under tension and compression tended to stabilize with further cycling.