The influences of holding at temperature on fatigue failure of a titanium metal matrix composite

The effect of holding at temperature on fatigue life of a 10 vol% particulate SiC reinforced Titanium alloy has been investigated. The influence of holding time at 600°C on fatigue of this material has been studied by using tension-compression tests, scanning electron microscope and image analysis. The specimens were heated to 600°C by using a controlled atmosphere furnace; hold at this temperature for time ranging from 0 to 100 hours, and then fatigue tested at room temperature under controlled constant plastic strain. The number of cycle to failure found to decrease with increasing of the holding time. In addition the fracture mechanism and number of debonded particles has been significantly influenced by holding time at 600°C.