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Influence of aluminide diffusion coating on low cycle fatigue properties of René 80
Rahmani, Kh ; Sharif University of Technology | 2008
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- Type of Document: Article
- DOI: 10.1016/j.msea.2007.09.062
- Publisher: 2008
- Abstract:
- Low cycle fatigue is one of the most important phenomena affecting the lifetime of jet engine blades. In this paper, the effect of aluminide diffusion coating (CODEP-B) on low cycle fatigue properties of René 80 has been studied at temperature of 871 °C, R = 0 and strain rate of about 2 × 10-3 s-1. Experimental results show that the applied cyclic strain is lower than 0.8%, the presence of aforesaid coating increases the fatigue lifetime. In coated specimens, while the total cyclic strain is lower than 0.8%, the nucleation of the cracks occurs merely in substrate, but in cyclic strain more than 1%, as a result of simultaneous nucleation of cracks in the coating surface, diffusion layer and in the substrate, fatigue lifetime of the coated specimens is lower than that of uncoated specimens
- Keywords:
- Aluminide ; Cyclic strain ; Aluminum compounds ; Cracks ; Diffusion coatings ; Fatigue of materials ; Nickel alloys ; Nucleation ; Strain rate
- Source: Materials Science and Engineering A ; Volume 486, Issue 1-2 , 2008 , Pages 686-695 ; 09215093 (ISSN)
- URL: https://www.sciencedirect.com/science/article/abs/pii/S0921509307017054