SiC_f/Al复合材料的疲劳行为

FATIGUE BEHAVIOUR OF NICALON SiC_f/Al COMPOSITE

本文对NICALON SiC束丝纤维增强Al预制丝的拉-拉疲劳行为(应力比R=0.1)进行了研究。结果表明,复合材料的疲劳性能比铝合金有明显提高,预制丝循环过程中,单丝纤维不断破断,导致材料最终破坏,600℃高温热暴露后,界面结合增强,预制丝的疲劳性能降低。

Tensile-tensile fatigue property (stress ratio R=0.1) of NICALON SiC multifilaments reinforced Al preform wire was studied. The fatigue performance of the com- posite is superior to that of Al alloy obviously. The fibres breaking during the cycling finally cause the fracture of the composite wire. After exposuring at 600℃, the interface strength in- creases and the fatigue property of the wire decreases.