Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7003954 | Wear | 2018 | 12 Pages |
Abstract
The surface crack of wheel/rail is a significant problem affecting the safety and maintenance of railway. This study presents the experimental results to explore the formation and damage mechanism of rolling contact fatigue (RCF) surface cracks of wheel/rail materials under dry condition. The results indicate that the surface cracks mouths on the rail roller are perpendicular to the resultant direction of shear force. Fatigue cracks grow along a larger angle to depth on the rail rollers than on the wheel rollers due to the difference of materials. Meanwhile, there are visible subsurface and secondary cracks as well as lamellar structure cracks. The vertical force changed in the later 1.5Ã105 cycles leads to a significant difference in the cracks propagation.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Y.B. Huang, L.B. Shi, X.J. Zhao, Z.B. Cai, Q.Y. Liu, W.J. Wang,