Publication detail

Study of cyclic strain localization and fatigue crack initiation using FIB technique

MAN, J. VYSTAVĚL, T. WEIDNER, A. KUBĚNA, I. PETRENEC, M. KRUML, T. POLÁK, J.

English title

Study of cyclic strain localization and fatigue crack initiation using FIB technique

Type

Peer-reviewed article not indexed in WoS or Scopus

Language

en

Original abstract

Focused ion beam (FIB) technique together with other advanced microscopic techniques was applied to study the early microstructural changes leading to fatigue crack initiation in cyclically strained polycrystals (nickel, 316L steel). Dislocation structures of persistent slip bands (PSBs) and surrounding matrix were investigated in detail using electron channeling contrast imaging (ECCI) technique (concurrently in the FIB cross-section and on the specimen surface) and simultaneously with the surface relief topography using transmission electron microscopy (TEM) of thin surface foils prepared by in situ lift-out technique. True shape of extrusions and intrusions and the path of initiated fatigue cracks were assessed in three dimensions by FIB micro-tomography. The role of twin boundary in cyclic strain localization and fatigue crack initiation is discussed. Principal advantages and some limitations of FIB technique in fatigue crack initiation studies in polycrystals are highlighted.

Keywords in English

Fatigue crack initiation, Persistent slip band (PSB), Extrusion, Intrusion, Nickel Austenitic steel, Focused ion beam (FIB)

Released

2012-02-01

ISSN

0142-1123

Volume

39

Number

1

Pages from–to

44–53

Pages count

8

BIBTEX


@article{BUT72578,
  author="Jiří {Man} and Tomáš {Vystavěl} and Anja {Weidner} and Ivo {Kuběna} and Martin {Petrenec} and Tomáš {Kruml} and Jaroslav {Polák}",
  title="Study of cyclic strain localization and fatigue crack initiation using FIB technique",
  journal="International Journal of Fatigue",
  year="2012",
  volume="39",
  number="1",
  pages="44--53",
  issn="0142-1123"
}