Abstract
In this research work, the influence of higher surface hardness on the fretting fatigue life of hard anodized aerospace AL7075-T6 alloy was investigated. An optimization of the parameters of hard anodized Al7075-T6 alloy to obtain higher surface hardness was presented. Confirmation test was carried out to show the improvement after using the best parameter combination attained from the optimization process. The result shows that hard anodized coating (surface with hardness of 360. HV and thickness of around 17. μm) can significantly improve fretting fatigue life of specimens at low stress, while at high stress, the extent of fretting fatigue life decreases. Hard anodized coating with higher thickness (29. mm) and high surface hardness (393. HV) decreased the fretting fatigue life of specimens at stresses beyond 200. MPa, this mainly attributed to the coating brittleness and micro-cracking.
| Original language | English |
|---|---|
| Pages (from-to) | 377-387 |
| Number of pages | 11 |
| Journal | Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing |
| Volume | 560 |
| DOIs | |
| State | Published - 10 Jan 2013 |
| Externally published | Yes |
Bibliographical note
Funding Information:The authors acknowledge the financial support of the University Malaya Research Grant (Grant no. UM.TNC2/RC/AET/GERAN (UMRG) RG133/11AET ) from the University of Malaya, Malaysia.
Keywords
- Aluminum7075-T6 alloy
- Fretting fatigue
- Hard anodized coating
- Surface hardness
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering