Detail publikačního výsledku

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

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

Original Title

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

English Title

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

Type

Paper in proceedings (conference paper)

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.

English 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

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

Key words in English

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

Authors

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

RIV year

2017

Released

01.04.2014

Publisher

Trans Tech Publications Ltd

Location

Zurich-Durnten, Switzerland

ISBN

9783037859346

Book

Key Engineering Materials

ISBN

1013-9826

Periodical

Key Engineering Materials (print)

Volume

2014

Number

592-593

State

Swiss Confederation

Pages from

461

Pages to

464

Pages count

4

URL

http://www.scientific.net/KEM.592-593.461

Full text in the Digital Library

http://hdl.handle.net/

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"
}