Abstract
The relationship between fatigue crack growth rate and self-emitting magnetic signal was studied in the three-point bending fatigue experiment for 28CrMo steel using different loading waveform on a electro-hydraulic servo fatigue testing machine. The characteristics of fatigue fracture was studied by SEM. The results show that the growth rate of fatigue cracks depends on the loading modes, of which the triangular wave loading brings the fastest growth rate and the most intense self-emitting magnetic signal, the sinusoidal wave loading brings the slowest rate and the weakest signal, while the square wave loading gives the intermediate values. A theoretical study, based on the concept of magnetic charge and the results of Ansys simulation, was carried out to analyze the variation of self-emitting magnetic signals of 28CrMo steel during fatigue crack growth under different loading modes. The fracture observation by SEM reveals that cleavage-like fatigue fracture occurs under all the three loading modes.
| Original language | English |
|---|---|
| Pages (from-to) | 109-113 |
| Number of pages | 5 |
| Journal | Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment |
| Volume | 34 |
| Issue number | 11 |
| Publication status | Published - Nov 2013 |
| Externally published | Yes |
Keywords
- Ansys simulation
- Fatigue crack
- Loading modes
- Magnetic charge
- Metal magnetic memory (MMM)