Failure Analysis of Cr7C3 Coating for Helicopter Transmission System
Authors
Wentong Cui, Juan Feng, Meijuan Lei, Ling Tian, Hailiang Chen
Corresponding Author
Wentong Cui
Available Online May 2017.
- DOI
- 10.2991/icmeit-17.2017.89How to use a DOI?
- Keywords
- Failure Analysis; Cr7C3 coating; microstructure; crack; contact fatigue.
- Abstract
The Cr7C3 coatings used in a helicopter transmission system was peel off in service life. In this paper, the causes of the crack are analyzed by experiments. The results show that peeling mode is contact fatigue flaking. The reason for the peeling is that there are many crack sources in the coatings. In addition, the contact between the surface asperities makes the coating surface and the near surface subjected to shear force. At the same time, under the action of high-pressure oil wave and alternating stress, the cracks extend in the direction of 45 degrees through the surface. Finally, under the effect of the surface shearing force, the coatings begin to peel off.
- Copyright
- © 2017, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Wentong Cui AU - Juan Feng AU - Meijuan Lei AU - Ling Tian AU - Hailiang Chen PY - 2017/05 DA - 2017/05 TI - Failure Analysis of Cr7C3 Coating for Helicopter Transmission System BT - Proceedings of the 2nd International Conference on Mechatronics Engineering and Information Technology (ICMEIT 2017) PB - Atlantis Press SP - 461 EP - 466 SN - 2352-538X UR - https://doi.org/10.2991/icmeit-17.2017.89 DO - 10.2991/icmeit-17.2017.89 ID - Cui2017/05 ER -