Fatigue testing of TBC on structural steel by cyclic bending

0443554 - ÚFP 2016 RIV US eng J - Journal Article
Mušálek, Radek - Kovářík, O. - Medřický, Jan - Curry, N. - Bjorklund, S. - Nylen, P.
Fatigue testing of TBC on structural steel by cyclic bending.
Journal of Thermal Spray Technology. Roč. 24, 1-2 (2015), s. 168-174. ISSN 1059-9630. E-ISSN 1544-1016
R&D Projects: GA ČR(CZ) GPP108/12/P552
Institutional support: RVO:61389021
Keywords : atmospheric plasma spray * failure mechanism * fatigue * NiCoCrAlY * thermal barrier coatings * yttria-stabilized zirconia
Subject RIV: JK - Corrosion ; Surface Treatment of Materials
Impact factor: 1.568, year: 2015
http://link.springer.com/article/10.1007%2Fs11666-014-0180-4

For applications with variable loading, fatigue performance of coated parts is of utmost importance. In this study, fatigue performance of conventional structural steel coated with thermal barrier coating (TBC) was evaluated in cyclic bending mode by "SF-Test" device. Testing was carried out at each stage of the TBC preparation process, i.e., for as-received and grit-blasted substrates, as well as for samples with Ni-based bond-coat and complete TBC: bond-coat with YSZ-based top-coat. Comparison of results obtained for different loading amplitudes supplemented by fractographic analysis enabled identification of dominating failure mechanisms and demonstrated applicability of the high-frequency resonant bending test for evaluation of fatigue resistance alteration at each stage of the TBC deposition process.
Permanent Link: http://hdl.handle.net/11104/0246240