Materials 2014, 7(5), 3533-3546; doi:10.3390/ma7053533
Article

Improvement on the Fatigue Performance of 2024-T4 Alloy by Synergistic Coating Technology

1,* email, 2email, 1,3email and 1email
Received: 16 December 2013; in revised form: 25 April 2014 / Accepted: 25 April 2014 / Published: 6 May 2014
View Full-Text   |   Download PDF [2180 KB, uploaded 6 May 2014]
Abstract: In this paper, rotating bending fatigue tests of 2024-T4 Al alloy with different oxide coatings were carried out. Compared to the uncoated and previously reported oxide coatings of aluminum alloys, the fatigue strength is able to be enhanced by using a novel oxide coating with sealing pore technology. These results indicate that the better the coating surface quality is, the more excellent the fatigue performance under rotating bending fatigue loading is. The improvement on the fatigue performance is mainly because the fatigue crack initiation and the early stage of fatigue crack growth at the coating layer can be delayed after PEO coating with pore sealing. Therefore, it is a so-called synergistic coating technology for various uses, including welding thermal cracks and filling micro-pores. The effects of different oxide coatings on surface hardness, compressive residual stress, morphology and fatigue fracture morphology are discussed. A critical compressive residual stress of about 95–100 MPa is proposed.
Keywords: plasma electrolytic oxidation; hard anodized; fatigue performance; synergistic coating; aluminum alloy
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |
EndNote


MDPI and ACS Style

Wang, X.-S.; Guo, X.-W.; Li, X.-D.; Ge, D.-Y. Improvement on the Fatigue Performance of 2024-T4 Alloy by Synergistic Coating Technology. Materials 2014, 7, 3533-3546.

AMA Style

Wang X-S, Guo X-W, Li X-D, Ge D-Y. Improvement on the Fatigue Performance of 2024-T4 Alloy by Synergistic Coating Technology. Materials. 2014; 7(5):3533-3546.

Chicago/Turabian Style

Wang, Xi-Shu; Guo, Xing-Wu; Li, Xu-Dong; Ge, Dong-Yun. 2014. "Improvement on the Fatigue Performance of 2024-T4 Alloy by Synergistic Coating Technology." Materials 7, no. 5: 3533-3546.


Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert