Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7004529 | Wear | 2014 | 8 Pages |
Abstract
The plain fatigue and fretting fatigue tests of Ti-1023 titanium alloy were performed using a high-frequency push-pull fatigue testing machine. Both Ïmax versus number of cycles to failure curves were obtained for comparative analysis of the fretting effect on fatigue performance of the titanium alloy. Meanwhile, by analyzing the fracture of plain fatigue and fretting fatigue, the fretting scar and the fretting debris observed by scanning electron microscopy (SEM), the mechanism of fretting fatigue failure of Ti-1023 titanium alloy is discussed. The fretting fatigue strength of Ti-1023 titanium alloy is 175Â MPa under 10Â MPa contact pressure, which is 21% of plain fatigue strength (836Â MPa). Under fretting condition, the Ti-1023 titanium alloy fatigue fracture failure occurs in a shorter fatigue life. When it comes to Ïmax versus number of cycles to failure curves, data points in the range of 106-107Â cycles under plain fatigue condition moved to the range of 105-106 under fretting fatigue condition. The integrity of the fatigue specimen surface was seriously damaged under the effect of fretting. With the alternating stress loaded on specimen, the stress concentrated on the surface of fretting area, which brought earlier the initiation and propagation of crack.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
G.Q. Wu, Z. Li, W. Sha, H.H. Li, L.J. Huang,