Study on Rotating Bending Fatigue Property of Ti65 Titanium Alloy

Abstract:

The rotating bending fatigue properties of Ti65 titanium alloy blisk forging was studied in the present investigation. The smooth and notched specimens were prepared to test the fatigue properties at room temperature and 650°C. Meanwhile, the influences on rotating bending fatigue of temperature and type were analyzed. Furthermore, the fractural morphology was observed through scanning electron microscopy. The results showed that the medium fatigue strength of Ti65 titanium alloy decreased at 650°C compared with that at room temperature, and the fatigue strength of notched specimens indicated the same significant declination at different temperatures compared with smooth specimens. At room temperature the medium fatigue strength of smooth and notched are 473MPa and 173MPa, respectively, and the fatigue notch sensitive coefficient was 0.87. At 650°C the medium fatigue strength of smooth and notched specimens are 427MPa and 168MPa, where the fatigue notch sensitive coefficient was 0.78.

• Periodical: Materials Science Forum (Volume 849)
• Pages: 347-352
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.849.347
• Online since: March 2016
• Authors: Xu Wang, Si Qing Li, Jing Nan Liu
• Keywords: Fatigue Property, S-N Curve, Ti65 Titanium Alloy

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