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Fatigue crack propagation behaviour of a nickel based superalloy at elevated temperatures

Fatigue crack propagation behaviour of a nickel based superalloy at elevated temperatures

Authors :
G. Guo
Yunming Hu
L. Z. Zhang
X. Huang
Lei Wang
Source :
Materials Research Innovations. 18:S4-1087
Publication Year :
2014
Publisher :
Informa UK Limited, 2014.

Abstract

The fatigue crack growth behaviour of a nickel based superalloy at elevated temperatures 550, 650 and 710°C was studied. The direct current potential drop (DCPD) technique was used to measure the crack length during the test. It was found that the crack growth rates slightly increased with increasing temperatures, but the temperature effect on crack growth rates was less pronounced at higher ΔK ranges. At the same temperature the crack growth rates increased with increasing load ratios. The oxidation induced crack closure is considered to be a reason of the observed crack growth behaviour in this study.

Details

ISSN :
1433075X and 14328917
Volume :
18
Database :
OpenAIRE
Journal :
Materials Research Innovations
Accession number :
edsair.doi...........529880812c0f23f445c5828f724afdd3
Full Text :
https://doi.org/10.1179/1432891714z.000000000863