Abstract
Rotary bending gigacycle fatigue properties of Al-7Si-0.3Mg alloys were investigated, and the S-N curve and critical stress 88 MPa under fatigue life of 10 7 cycs were obtained. The results of fracture analysis show that the fatigue fracture mainly occurred at surface flaws or defects in the region of high stress amplitude level, whereas the fatigue fracture mainly occurred at a subsurface porosity in the region of low stress amplitude level. The quantitive relationship between porosity diameter and fatigue life was established and the critical size of porosity on different stress was obtained by using the formula Paris.
| Original language | English |
|---|---|
| Pages (from-to) | 284-288 |
| Number of pages | 5 |
| Journal | Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research |
| Volume | 26 |
| Issue number | 3 |
| State | Published - Jun 2012 |
Keywords
- Al-7Si-0.3Mg alloy
- Metallic materials
- Porosity
- Rotary bending gigacycle fatigue
- S-N curve