Detail publikace

Stage I fatigue cracking in MAR-M 247 superalloy at elevated temperatures

ŠMÍD, M. HUTAŘ, P. HORNÍK, V. HRBÁČEK, K. KUNZ, L.

Anglický název

Stage I fatigue cracking in MAR-M 247 superalloy at elevated temperatures

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

en

Originální abstrakt

Nickel base superalloys exhibit fatigue fracture behavior with features of brittle-like cleavage cracking under high cycle fatigue loading at temperatures up to approximately 800 °C. This specific fracture behavior was already documented in several studies, but a possible mechanism of fatigue crack propagation under this mode has not been made completely clear yet. The aim of this paper is to put more light on the phenomenon by using advanced electron microscopy techniques like electron back-scattered diffraction (EBSD) and focused ion beam (FIB) sectioning. Fractured specimens after high cycle fatigue tests were thoroughly examined with the aim to localize the fatigue crack initiation sites and accompanying features of the fatigue crack propagation. Several specimens were cross-sectioned in order to characterize active slip systems, cyclic plastic deformation localization and fatigue crack propagation. Dislocation structures were studied by transmission electron microscopy (TEM).

Anglický abstrakt

Nickel base superalloys exhibit fatigue fracture behavior with features of brittle-like cleavage cracking under high cycle fatigue loading at temperatures up to approximately 800 °C. This specific fracture behavior was already documented in several studies, but a possible mechanism of fatigue crack propagation under this mode has not been made completely clear yet. The aim of this paper is to put more light on the phenomenon by using advanced electron microscopy techniques like electron back-scattered diffraction (EBSD) and focused ion beam (FIB) sectioning. Fractured specimens after high cycle fatigue tests were thoroughly examined with the aim to localize the fatigue crack initiation sites and accompanying features of the fatigue crack propagation. Several specimens were cross-sectioned in order to characterize active slip systems, cyclic plastic deformation localization and fatigue crack propagation. Dislocation structures were studied by transmission electron microscopy (TEM).

Klíčová slova anglicky

Superalloy; High cycle fatigue; Elevated temperature; MAR-M 247; Fatigue crack initiation

Vydáno

21.07.2016

Nakladatel

Elsevier

Místo

Catania, Italy

ISSN

2452-3216

Ročník

2

Číslo

1

Strany od–do

3018–3025

Počet stran

8

BIBTEX


@article{BUT127554,
  author="Miroslav {Šmíd} and Pavel {Hutař} and Vít {Horník} and Karel {Hrbáček} and Ludvík {Kunz},
  title="Stage I fatigue cracking in MAR-M 247 superalloy at elevated temperatures",
  year="2016",
  volume="2",
  number="1",
  month="July",
  pages="3018--3025",
  publisher="Elsevier",
  address="Catania, Italy",
  issn="2452-3216"
}