Abstract
Among gas turbine components such as compressor blades made of precipitation-hardened martensitic stainless steel, a phenomenon known as pitting corrosion can occur on the surfaces of components during exposure to a marine environment. This can lead to surface degradation followed by crack initiation and further propagation with high-cycle fatigue as the main mode of damage. In order to obtain detailed statistical characterization of pitting severity, which may enable obtaining preventive models of the phenomena, a new study on pit size analysis and pitting inspection technique is proposed. In this investigation, pit depth values are considered as the main factor behind this type of failures. This article presents the results of pit depth assessment and other pitting characteristics with the use of confocal microscopy as a non-destructive technique. The results obtained show that confocal microscopy can be successfully used as a non-destructive tool for the evaluation of pitting severity.
Similar content being viewed by others
References
Fantechi, F., Innocenti, M.: Chloride stress corrosion cracking of precipitation hardening S.S. impellers in centrifugal compressor. Laboratory investigation and corrective actions. Eng. Fail. Anal. 8, 477–492 (2001)
Xie, Y., Wang, M., Zhang, G., Chang, M.: Analysis of superalloy turbine blade tip cracking during service. Eng. Fail. Anal. 13, 1429–1436 (2006)
Craig, B.: Material failure modes, part III: a brief tutorial on corrosion-related material failure modes. J. Fail. Anal. Prev. 6(2), 12–19 (2006)
Bayoumi, M., Ismail, A., Latif, A.: Finite element analysis of stresses due to pitting of steel specimens under different cyclic bending stresses. Eng. Fract. Mech. 53, 141–151 (1996)
BS 7910:2005: Guide to methods for assessing the acceptability of flaws in metallic structures. British Standards Institution (2005)
ASTM G46-94: Standard guide for examination and evaluation of pitting corrosion. Annual Book of Standards, Vol 03.02 (2005)
Mauko, A., Muck, T., Mirtic, B., Mladenovic, A., Kreft, M.: Use of confocal laser scanning microscopy (CLSM) for the characterization of porosity in marble. Mater. Charact. 60, 603–609 (2009)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Jasiczek, M., Kaczorowski, J., Kosieniak, E. et al. A New Approach to Characterization of Gas Turbine Components Affected by Pitting Corrosion. J Fail. Anal. and Preven. 12, 305–313 (2012). https://doi.org/10.1007/s11668-012-9550-8
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11668-012-9550-8