Publication result detail

Effect of alumina-silica-zirconia eutectic ceramic thermal barrier coating on the low cycle fatigue behaviour of cast polycrystalline nickel-based superalloy at 900 °C

OBRTLÍK, K.; ČELKO, L.; CHRÁSKA, T.; ŠULÁK, I.; GEJDOŠ, P.

Original Title

Effect of alumina-silica-zirconia eutectic ceramic thermal barrier coating on the low cycle fatigue behaviour of cast polycrystalline nickel-based superalloy at 900 °C

English Title

Effect of alumina-silica-zirconia eutectic ceramic thermal barrier coating on the low cycle fatigue behaviour of cast polycrystalline nickel-based superalloy at 900 °C

Type

WoS Article

Original Abstract

Cylindrical specimens of nickel-based superalloy Inconel 713LC in an as-cast condition and coated with a thermal barrier coating (TBC) system consisting of a CoNiCrAlY bond coat and an eutectic ceramic alumina-silica-zirconia top coat were cyclically loaded under strain control at 900°C in air. TBC was deposited using atmospheric plasma spray and waterstabilised plasma spray techniques for the bond coat and the top coat, respectively. The microstructure of the substrate material and the TBC was characterised and the hardness of TBC was measured. The cyclic stress-strain response and fatigue life of both materials were assessed. The stress response of the TBC-coated superalloy is lower than the uncoated superalloy. The detrimental effect of TBC on the Basquin curve is documented. The specimen section and fracture surface observations revealed fatigue damage mechanisms in both the TBC-coated and uncoated specimens, and that finding helps explain the differences in the fatigue behaviour of both materials.

English abstract

Cylindrical specimens of nickel-based superalloy Inconel 713LC in an as-cast condition and coated with a thermal barrier coating (TBC) system consisting of a CoNiCrAlY bond coat and an eutectic ceramic alumina-silica-zirconia top coat were cyclically loaded under strain control at 900°C in air. TBC was deposited using atmospheric plasma spray and waterstabilised plasma spray techniques for the bond coat and the top coat, respectively. The microstructure of the substrate material and the TBC was characterised and the hardness of TBC was measured. The cyclic stress-strain response and fatigue life of both materials were assessed. The stress response of the TBC-coated superalloy is lower than the uncoated superalloy. The detrimental effect of TBC on the Basquin curve is documented. The specimen section and fracture surface observations revealed fatigue damage mechanisms in both the TBC-coated and uncoated specimens, and that finding helps explain the differences in the fatigue behaviour of both materials.

Keywords

Thermal barrier coating; nickel-based superalloy; plasma spraying; high temperature fatigue; fatigue life; cyclic stress-strain curve

Key words in English

Thermal barrier coating; nickel-based superalloy; plasma spraying; high temperature fatigue; fatigue life; cyclic stress-strain curve

Authors

OBRTLÍK, K.; ČELKO, L.; CHRÁSKA, T.; ŠULÁK, I.; GEJDOŠ, P.

RIV year

2018

Released

25.05.2017

ISBN

0257-8972

Periodical

SURFACE & COATINGS TECHNOLOGY

Volume

318

Number

1

State

Swiss Confederation

Pages from

374

Pages to

381

Pages count

8

URL

http://dx.doi.org/10.1016/j.surfcoat.2017.03.003

BibTex

@article{BUT134870,
  author="Karel {Obrtlík} and Ladislav {Čelko} and Tomáš {Chráska} and Ivo {Šulák} and Pavel {Gejdoš}",
  title="Effect of alumina-silica-zirconia eutectic ceramic thermal barrier coating on the low cycle fatigue behaviour of cast polycrystalline nickel-based superalloy at 900 °C",
  journal="SURFACE & COATINGS TECHNOLOGY",
  year="2017",
  volume="318",
  number="1",
  pages="374--381",
  doi="10.1016/j.surfcoat.2017.03.003",
  issn="0257-8972",
  url="http://dx.doi.org/10.1016/j.surfcoat.2017.03.003"
}

Documents

2017-ART-04--SurfCoat--obrtlik-MAUISCRIPT