Publication detail

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

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

Original Title

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

Type

journal article in Web of Science

Language

English

Original Abstract

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).

Keywords

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

Authors

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

Released

21. 7. 2016

Publisher

Elsevier

Location

Catania, Italy

ISBN

2452-3216

Periodical

Procedia Structural Integrity

Year of study

2

Number

1

State

Republic of Italy

Pages from

3018

Pages to

3025

Pages count

8

URL

http://www.sciencedirect.com/science/article/pii/S2452321616303961

Full text in the Digital Library

http://hdl.handle.net/11012/203170

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",
  journal="Procedia Structural Integrity",
  year="2016",
  volume="2",
  number="1",
  pages="3018--3025",
  doi="10.1016/j.prostr.2016.06.378",
  issn="2452-3216",
  url="http://www.sciencedirect.com/science/article/pii/S2452321616303961"
}