Abstract
The constituent distribution, the wear resistance and fretting fatigue resistance (FFR) of electrospark strengthening layer on Ti811 titanium alloy were investigated. The results indicate that alloying layer could be produced by electrospark surface strengthening (ESS) on Ti811 titanium alloy with OCrl8Ni9 electrode. Thus the hardness and wear resistance of Ti811 alloy are increased remarkably. But the hardness of OCrl8Ni9 alloying layer is high with low ductility, so cracks easily initiate and extend into the bulk material quickly in the process of fretting fatigue (FF). Therefore the FFR of the titanium alloy treated by ESS is lower than that of the untreated specimen at elevated temperature. Shot peening (SP) can improve the FFR of the titanium alloy treated by ESS to the level of untreated specimen.
| Original language | English |
|---|---|
| Pages (from-to) | 31-35+41 |
| Journal | Cailiao Gongcheng/Journal of Materials Engineering |
| Issue number | 9 |
| State | Published - Sep 2006 |
Keywords
- Electrospark surface strengthening
- Elevated temperature
- Fretting fatigue
- Shot peening
- Titanium alloy