Publication detail

Fatigue behaviour of coated and uncoated cast Inconel 713LC at 800 deg

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

Czech title

Únavové chování povlakované a nepovlakované lité slitiny IN713LC při 800 stC

English title

Fatigue behaviour of coated and uncoated cast Inconel 713LC at 800 deg

Type

journal article - other

Language

en

Original abstract

Cylindrical specimens of Inconel 713LC in as-received condition and with surface treatment by Al diffusion coating were cyclically strained under strain control at 800 deg in air. Surface treated layer characterization is obtained and the hardness depth profile was measured. Cyclic stress-strain response and fatigue life of both materials are acquired. The stress response of the coated superalloy is lower in comparison with the untreated one. Beneficial effect of surface treatment on the Manson-Coffin curve is documented. Specimen section and fracture surface study revealed fatigue damage mechanisms both in coated and uncoated specimens. Main crack propagation path is predominantly interdendritic.

Czech abstract

Válcové vzorky ze slitiny Inconel 713LC ve stavu po odlití a ve stavu po povrchovém povlakování ochranou vrstvou na bázi Al byly cyklicky namáhány v režimu řízené deformace při teplotě 800 stC. U vzorků s povrchovou vrstvou byl měřen tvrdostní profil, tj. měřena změna tvrdosti se vzdáleností od povrchu. Cyklická napěťová a deformační odezva a únavová životnost byla stanovena. Napěťová odezva povlakovaných vzorků byla nižší v porovnání s nepovlakovanými zkušebními tělesy. Porovnáním Manson-Coffinových křivek lze konstatovat pozitivní vliv ochranné vrstvy Al na únavovou životnost. Byly studovány mechanismy únavového poškození na základě pozorování osových podélných řezů a fraktografie lomu.

English abstract

Cylindrical specimens of Inconel 713LC in as-received condition and with surface treatment by Al diffusion coating were cyclically strained under strain control at 800 deg in air. Surface treated layer characterization is obtained and the hardness depth profile was measured. Cyclic stress-strain response and fatigue life of both materials are acquired. The stress response of the coated superalloy is lower in comparison with the untreated one. Beneficial effect of surface treatment on the Manson-Coffin curve is documented. Specimen section and fracture surface study revealed fatigue damage mechanisms both in coated and uncoated specimens. Main crack propagation path is predominantly interdendritic.

Keywords in Czech

vysokoteplotní únava, difúzní povlakování, superslitina, slévárenské vady, nukleace trhliny

Keywords in English

High temperature fatigue; diffusion coating; superalloy; defects; crack nucleation

RIV year

2012

Released

01.12.2012

Publisher

Elsevier, Ltd.

Location

UK

ISSN

0142-1123

Volume

41

Number

.

Pages from–to

101–106

Pages count

6

BIBTEX


@article{BUT76149,
  author="Karel {Obrtlík} and Simona {Hutařová} and Martin {Juliš} and Tomáš {Podrábský} and Jaroslav {Polák},
  title="Fatigue behaviour of coated and uncoated cast Inconel 713LC at 800 deg",
  year="2012",
  volume="41",
  number=".",
  month="December",
  pages="101--106",
  publisher="Elsevier, Ltd.",
  address="UK",
  issn="0142-1123"
}