应变速率对SiC_P增强铝基复合材料拉伸性能的影响

Effects of Strain Rate on Tensile Property of Aluminum Matrix Composite Reinforced with SiC Particle

采用拉伸试验研究了应变速率对SiC颗粒增强铝基复合材料塑性延伸强度及杨氏模量的影响。结果表明,随着应变速率的增加(0.0006~0.002s^(-1)),规定塑性延伸强度增加,杨氏模量波动较小。断口分析表明,尺寸为10~15μm SiC颗粒增强铝基复合材料断裂以SiC颗粒解理断裂为主。

The effects of strain rate on the plastic elongation strength and Young＇s modulus of aluminum matrix composite reinforced by SiC particles were investigated by tensile test. The results show that with the increase of strain rate （0.0006-0.002 s-1）, the plastic elongation strength increases and Young＇s modulus has little fluctuation. The fracture analysis shows that the fracture of aluminum matrix composite reinforced by SiC particles（10-15 μm） is main cleavage fracture of SiC particles.