Publication detail

Influence of AlSi diffusion coating on low cycle fatigue properties of cast superalloy Inconel 738LC at 800deg

JULIŠ, M. OBRTLÍK, K. POSPÍŠILOVÁ, S. PODRÁBSKÝ, T. POLÁK, J.

Czech title

Vliv ochranné vrstvy AlSi na nízkocyklovou únavu lité superslitiny 738LC při 800stC

English title

Influence of AlSi diffusion coating on low cycle fatigue properties of cast superalloy Inconel 738LC at 800deg

Type

journal article - other

Language

en

Original abstract

High temperature low cycle fatigue behaviour of cast nickel-based superalloy Inconel 738LC in as-received condition and coated with an Al-Si diffusion layer was studied. The Al-Si protective layer was deposited on the gauge section of cylindrical specimens using the slurry technique. Fatigue tests were performed on cylindrical specimens under total strain control in symmetrical cycle at 800 deg in air. The coating has a beneficial effect on fatigue life in the low amplitude domain. The stress response of the coated material is higher for high amplitudes in comparison with the uncoated one. Fracture surfaces and sections parallel to the specimen axis have been examined to study fatigue damage mechanisms.

Czech abstract

Byla studováno únavové chování lité niklové superslitiny Inconel 738LC ve výchozím stavu pod odlití a tepelném zpracování a ve stavu po povlakování povrchu vrstvou na bázi AlSi. Ochranná vrstva byla nanesena na zkušební část válcového vzorku technikou slurry. Únavové testy byly provedeny v režimu řízené deformace při symetrickém cyklu za teploty 800 stC na vzduchu. Povrchová vrstva má pozitivní účinek na životnost v oblasti nízké amplitudy. Napěťová odezva povlakovaného vzorku je vyšší v oblasti vyšších amplitud v porovnání s nepovlakovanými vzorky. Na základě lomových ploch a osových řezů byly také studovány mechanismy únavového poškození.

English abstract

High temperature low cycle fatigue behaviour of cast nickel-based superalloy Inconel 738LC in as-received condition and coated with an Al-Si diffusion layer was studied. The Al-Si protective layer was deposited on the gauge section of cylindrical specimens using the slurry technique. Fatigue tests were performed on cylindrical specimens under total strain control in symmetrical cycle at 800 deg in air. The coating has a beneficial effect on fatigue life in the low amplitude domain. The stress response of the coated material is higher for high amplitudes in comparison with the uncoated one. Fracture surfaces and sections parallel to the specimen axis have been examined to study fatigue damage mechanisms.

Keywords in Czech

nízkocyklová únava, difúzní povlaky, IN738LC, vysoká teplota, životnost

Keywords in English

low cycle fatigue, diffusion coating, Inconel 738LC, high temperature, fatigue life, cyclic stress-strain curve, cyclic hardening/softening curve

RIV year

2012

Released

01.12.2012

Publisher

Trans Tech Publications

Location

Switzerland

ISSN

1013-9826

Volume

488-489

Number

1

Pages from–to

307–310

Pages count

4

BIBTEX


@article{BUT76147,
  author="Martin {Juliš} and Karel {Obrtlík} and Simona {Hutařová} and Tomáš {Podrábský} and Jaroslav {Polák},
  title="Influence of AlSi diffusion coating on low cycle fatigue properties of cast superalloy Inconel 738LC at 800deg",
  year="2012",
  volume="488-489",
  number="1",
  month="December",
  pages="307--310",
  publisher="Trans Tech Publications",
  address="Switzerland",
  issn="1013-9826"
}