Detail publikace

Paths of Shear-mode Cracks in Ferritic and Austenitic Steel

VOJTEK, T. POKLUDA, J.

Originální název

Paths of Shear-mode Cracks in Ferritic and Austenitic Steel

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

This work was focused on experimental study of shear crack paths in ferritic steel and austenitic steel. The aim was to elucidate the growth micromechanism of mode II and III cracks. The crack path and the surface topography were studied by means of 3D reconstruction of the fracture surfaces using stereophotogrammetry in SEM. Fracture morphologies in austenite and ferrite were different from qualitative as well as quantitative point of view. Measurements by means of the profile analysis were used to determine local deflection and twisting angles of the crack with respect to the remote shear direction. In this way, the crack tendency to grow in local mode I was detected. This tendency was found to be much higher in austenite than in ferrite. The mean branch deflection of remote mode II cracks in the austenite was close to the theoretical critical angle 70 degrees. For mode III cracks, the mean twist angle of branches was apparently lower than the critical angle 45 degrees which seems to be associated with the geometrically more difficult branching in mode III with respect to mode II.

Klíčová slova

modes II and III, fractography, stereophotogrammetry, steels, mode I branching

Autoři

VOJTEK, T.; POKLUDA, J.

Rok RIV

2012

Vydáno

19. 9. 2012

Místo

Parma

ISBN

9788895940441

Kniha

Proceedings of the 4th International Conference on Crack Paths (CP 2012)

Strany od

727

Strany do

734

Strany počet

8

BibTex

@inproceedings{BUT95957,
  author="Tomáš {Vojtek} and Jaroslav {Pokluda}",
  title="Paths of Shear-mode Cracks in Ferritic and Austenitic Steel",
  booktitle="Proceedings of the 4th International Conference on Crack Paths (CP 2012)",
  year="2012",
  pages="727--734",
  address="Parma",
  isbn="9788895940441"
}