Abstract
The rolling contact fatigue of a sprayed alumina ceramics with a nominal composition of Al2O32.3 mass%TiO2 was studied with a two-roller test apparatus under pure rolling contact condition with oil lubricant. The alumina ceramics was prepared by plasma spray process. The influence of undercoating of sprayed Ni based alloy and surface sealing on the rolling contact fatigue was investigated. The failure mode of all sprayed rollers was spalling caused by subsurface cracking. Neither undercoating nor surface sealing contributed to the improvement of the rolling contact fatigue. The elastic modulus of the alumina sprayed layer evaluated with the nano-indentation method was around 85 GPa. The subsurface shear stresses were calculated with two-dimensional FEM analyses. The maximum values of orthogonal shear stress and maximum shear stress occurred within the spraved layer. The depths of observed subsurface cracks were generally deeper than those of the maxima of shear stresses.
| Original language | English |
|---|---|
| Pages (from-to) | 3331-3338 |
| Number of pages | 8 |
| Journal | Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C |
| Volume | 70 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Nov 2004 |
Keywords
- Alumina
- FEM
- Machine Element
- Nano-Indentation
- Oil Lubrication
- Rolling Contact Fatigue
- Spraying
- Tribology
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Industrial and Manufacturing Engineering