Ultra-long Life Fatigue Behavior of SUJ2 Bearing Steel
Ultra-long life fatigue behavior of SUJ2 bearing steel was studied by ultrasonic fatigue testing machine. The results show that, for the crack origin of composite oxide and TiCN,crack initiates from the interface between inclusion and matrix, and for the iron-chromium carbide crack origin, the inclu...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Journal of Materials Engineering
2016-08-01
|
| Series: | Journal of Materials Engineering |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.08.014 |
| Summary: | Ultra-long life fatigue behavior of SUJ2 bearing steel was studied by ultrasonic fatigue testing machine. The results show that, for the crack origin of composite oxide and TiCN,crack initiates from the interface between inclusion and matrix, and for the iron-chromium carbide crack origin, the inclusion itself cracks. The relative GBF(granular bright facet) size is proportional to 1/Δ<i>K</i><sub>inc</sub><sup>2</sup>. GBF is no longer formed when Δ<i>K</i><sub>inc</sub>>8MPa·m<sup>1/2</sup> for SUJ2 bearing steel. The crack propagation rule in GBF is obtained by data fitting, it is verified that Paris equation which can describe the crack growth in GBF is verified. |
|---|---|
| ISSN: | 1001-4381 1001-4381 |