Publication detail

Degradation of TBC Coating during Low-cycle Fatigue Tests at High Temperature

HUTAŘOVÁ, S. OBRTLÍK, K. JULIŠ, M. ČELKO, L. JULIŠOVÁ, M. PODRÁBSKÝ, T.

English title

Degradation of TBC Coating during Low-cycle Fatigue Tests at High Temperature

Type

Paper in proceedings (conference paper)

Language

en

Original abstract

The work is focused on the study of degradation of ZrO2 stabilized by Y2O3 (YSZ) thermal-barrier-coating system with CoNiCrAlY bond coat applied on cast polycrystalline nickelbased superalloy Inconel 713LC. Cylindrical specimens in as-coated conditions were cyclically strained under strain control with constant total strain amplitude in symmetrical cycle at high temperature (900 oC) in air. Coating system YSZ with CoNiCrAlY bond coat were prepared by APS method on blasted surface. The microstructure of TBC was characterized with scanning electron microscopy and energy dispersion X-ray analysis. The coating thickness and hardness profile was measured. Fracture surface, surface relief and polished sections parallel to the specimen axis were examined to study damage mechanisms in coatings under cyclic loading at high temperature. It was find that initiation of the fatigue crack usually occurs on interface YSZ-CoNiCrAlY and the trajectory of the further crack propagation was documented.

Keywords in English

High temperature fatigue; YSZ; CoNiCrAlY; Inconel 713LC; crack initiation; crack propagation

Released

2014-04-01

Publisher

Trans Tech Publications Ltd

Location

Zurich-Durnten, Switzerland

ISBN

9783037859346

ISSN

1013-9826

Book

Key Engineering Materials

Volume

2014

Number

592-593

Pages from–to

461–464

Pages count

4

BIBTEX


@inproceedings{BUT105746,
  author="Simona {Hutařová} and Karel {Obrtlík} and Martin {Juliš} and Ladislav {Čelko} and Martina {Julišová} and Tomáš {Podrábský}",
  title="Degradation of TBC Coating during Low-cycle Fatigue Tests at High Temperature",
  booktitle="Key Engineering Materials",
  year="2014",
  journal="Key Engineering Materials (print)",
  volume="2014",
  number="592-593",
  pages="461--464",
  publisher="Trans Tech Publications Ltd",
  address="Zurich-Durnten, Switzerland",
  doi="10.4028/www.scientific.net/KEM.592-593.461",
  isbn="9783037859346",
  issn="1013-9826",
  url="http://www.scientific.net/KEM.592-593.461"
}