Publication detail

High-Temperature Low-Cycle Fatigue Behaviour of MAR-M247 Coated with Newly Developed Thermal and Environmental Barrier Coating

ŠULÁK, I. OBRTLÍK, K. ČELKO, L. GEJDOŠ, P. JECH, D.

Original Title

High-Temperature Low-Cycle Fatigue Behaviour of MAR-M247 Coated with Newly Developed Thermal and Environmental Barrier Coating

Type

journal article in Web of Science

Language

English

Original Abstract

This study investigates the strain-controlled low-cycle fatigue (LCF) behaviour of an untreated and surface-treated MAR-M247 superalloy in a symmetrical push-pull cycle with a constant strain rate at 900°C in laboratory air. A newly developed experimental thermal and environmental barrier coating (TEBC) system, consisting of a 170 μm thick CoNiCrAlY bond coat (BC) and a bilayer ceramic top coat (TC), with an interlayer and an upper layer, was deposited using air plasma spray techniques. The ceramic interlayer with an average thickness of 77 μm was formed from agglomerated and sintered yttria-stabilized zirconia. An experimental mixture of mullite (Al6Si2O13) and hexacelsian (BaAl2Si2O8) at a ratio of 70/30 vol.% was sprayed as the upper layer. The average thickness of the TC was 244 μm. The specimen sections were investigated using a TESCAN Lyra3 XMU scanning electron microscope (SEM) to characterise the microstructure of both the TEBC and the substrate material. The fatigue damage mechanisms in the TEBC-coated superalloy were studied. The fatigue life curves in the representation of the total strain amplitude versus the number of cycles to failure of the TEBC-coated and uncoated superalloy were assessed. TEBC was found to have a slight, positive effect on the fatigue life of MAR-M247.

Keywords

MAR-M247; thermal barrier coating; high-temperature low cycle fatigue; cyclic stress-strain curve; fatigue life curves; degradation mechanisms

Authors

ŠULÁK, I.; OBRTLÍK, K.; ČELKO, L.; GEJDOŠ, P.; JECH, D.

Released

24. 12. 2018

Publisher

Hindawi

Location

United Kingdom

ISBN

1687-8434

Periodical

Advances in Materials Science and Engineering

Year of study

2018

Number

1

State

United States of America

Pages from

1

Pages to

8

Pages count

8

URL

https://www.hindawi.com/journals/amse/2018/9014975/

Full text in the Digital Library

http://hdl.handle.net/11012/193258

BibTex

@article{BUT160716,
  author="Ivo {Šulák} and Karel {Obrtlík} and Ladislav {Čelko} and Pavel {Gejdoš} and David {Jech}",
  title="High-Temperature Low-Cycle Fatigue Behaviour of MAR-M247 Coated with Newly Developed Thermal and Environmental Barrier Coating",
  journal="Advances in Materials Science and Engineering",
  year="2018",
  volume="2018",
  number="1",
  pages="1--8",
  doi="10.1155/2018/9014975",
  issn="1687-8434",
  url="https://www.hindawi.com/journals/amse/2018/9014975/"
}