Detail publikace

Rozpor mezi lomovou a vrubohou houževnatostívysoce čistých nízkolegovaných ocelí

POKLUDA, J. VLACH, B. ŠANDERA, P. JURÁŠEK, L.

Český název

Rozpor mezi lomovou a vrubohou houževnatostívysoce čistých nízkolegovaných ocelí

Anglický název

Contradiction in Fracture- and Notch Toughness of High Purity Low Alloy Steels

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

en

Originální abstrakt

Values of initial fracture toughness and impact notch toughness of high purity USSLA steel were determined for 6 different heat treatments leading to 3 different prior austenite grain sizes d. Fracture surfaces of specimens exhibited transgranular as well as intergranular morphology. Observed extreme contradiction in fracture- and notch toughness behavior can be explained in terms of intergranularly induced crack tip shielding working particularly during the fracture toughness test of coarse grained specimens. Inverse behaviour of specimens for impact tests is associated with low resistance of coarse grained structures against crack nucleation caused predominantly by pronounced carbide precipitation and long dislocation mean free paths. Quantitative assessment of the shielding effect by means of both the 3D grain boundary network model (Poisson-Voronoi tessellation) and the FRANC3D program (boundary element method) enables to obtain realistic values of surface energy related to corrected KIc values.

Anglický abstrakt

Values of initial fracture toughness and impact notch toughness of high purity USSLA steel were determined for 6 different heat treatments leading to 3 different prior austenite grain sizes d. Fracture surfaces of specimens exhibited transgranular as well as intergranular morphology. Observed extreme contradiction in fracture- and notch toughness behavior can be explained in terms of intergranularly induced crack tip shielding working particularly during the fracture toughness test of coarse grained specimens. Inverse behaviour of specimens for impact tests is associated with low resistance of coarse grained structures against crack nucleation caused predominantly by pronounced carbide precipitation and long dislocation mean free paths. Quantitative assessment of the shielding effect by means of both the 3D grain boundary network model (Poisson-Voronoi tessellation) and the FRANC3D program (boundary element method) enables to obtain realistic values of surface energy related to corrected KIc values.

Klíčová slova anglicky

fracture toughness, notch toughness, low alloy steel, austenite grain

Rok RIV

2001

Vydáno

01.06.2001

Nakladatel

Inst. Nuclear Research

Místo

Řež

ISBN

92-828-8323-X

Kniha

Cleaner Metal for Industrial Exploitation

Počet stran

8

BIBTEX


@inproceedings{BUT2818,
  author="Jaroslav {Pokluda} and Bohumil {Vlach} and Pavel {Šandera} and Ladislav {Jurášek},
  title="Contradiction in Fracture- and Notch Toughness of High Purity Low Alloy Steels",
  booktitle="Cleaner Metal for Industrial Exploitation",
  year="2001",
  month="June",
  publisher="Inst. Nuclear Research",
  address="Řež",
  isbn="92-828-8323-X"
}