抄録
The effect of frequency on giga-cycle fatigue properties was investigated for 900-MPa-class Ti-6Al-4V alloy with smoothed specimen and with 0.3mm hole notched specimens, using 120Hz electro-magnetic resonance, 600Hz high-speed servo-hydraulic and 20kHz ultrasonic fatigue testing machines. Fatigue properties were, then, independent of frequency for internal fracture with smoothed specimens and for surface fracture with notched specimens, the properties were dependent of the frequency for surface fracture with smoothed specimens.
