Resonance bending fatigue testing with simultaneous damping measurement and its application on layered coatings

0459799 - ÚFP 2017 RIV GB eng J - Journal Article
Kovářík, O. - Haušild, P. - Čapek, J. - Medřický, Jan - Siegl, J. - Mušálek, Radek - Pala, Zdeněk - Curry, N. - Bjorklund, S.
Resonance bending fatigue testing with simultaneous damping measurement and its application on layered coatings.
International Journal of Fatigue. Roč. 82, January (2016), s. 300-309. ISSN 0142-1123. E-ISSN 1879-3452.
[International Conference on Fatigue Damage of Structural Materials Conference/10./. Massachusetts, 21.09.2014-26.09.2014]
R&D Projects: GA ČR GB14-36566G
Institutional support: RVO:61389021
Keywords : Crack detection * Damping * Fatigue * Hastelloy-X * Nondestructive testing
Subject RIV: JK - Corrosion ; Surface Treatment of Materials
Impact factor: 2.899, year: 2016
http://www.sciencedirect.com/science/article/pii/S0142112315002443

The use of specimen loss factor as fatigue damage indicator of Hastelloy-X substrates with different surface treatments was investigated together with other fatigue damage indicators, namely resonance frequency and crack mouth length. The tested surface treatments included grit-blasting and plasma spraying of NiCoCrAlY bond coat and yttria stabilized zirconia (YSZ) top coat. The loss factors of fatigue test specimens were measured repeatedly during the resonance bending fatigue test using the conventional free decay method. The analysis of the damping spectra, i.e. the model describing the relation of loss factor to maximum macroscopic specimen strain εyy was drafted. The model is based on the combination of defect models developed by Göken and Riehemann (2004) and classical dislocation model of Granato and Lücke (1956).
Permanent Link: http://hdl.handle.net/11104/0259957