Unidirectionally fiber reinforced titanium matrix composites (TMCs) have superior longitudinal (parallel to the fiber) mechanical properties compared to their monolithic counterparts. However, their transverse (normal to the fiber) mechanical properties are generally poor. To improve the transverse properties of TMCs, it is necessary to first evaluate the transverse properties precisely. In the present study, transverse fatigue properties of SiC fiber reinforced TMCs were investigated. SCS-6 SiC fiber reinforced Timetal834 alloy matrix composite was made by coated fiber technique with a magnetron sputtering apparatus. Fatigue tests were conducted under load control at room temperature and at 873 K. Transverse fatigue strength of the SCS-6/Timetal 834 composite was significantly lower than that of the unreinforced Timetal834 alloy at all fatigue cycles tested. Notably, the transverse fatigue strength at room temperature was nearly the same as that at 873 K. However, different cyclic stress-strain responses suggested different damage mechanisms.
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