Detail publikačního výsledku

Antagonism in Fracture and Notch Toughness of UHSLA Steels

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

Originální název

Antagonism in Fracture and Notch Toughness of UHSLA Steels

Anglický název

Antagonism in Fracture and Notch Toughness of UHSLA Steels

Druh

Stať ve sborníku v databázi WoS či Scopus

Originální abstrakt

Values of initial fracture toughness KIc and impact absorbed energy of ultra-high strength low alloy steel were determined for 6 different heat treatments leading to 3 different mean prior austenite grain sizes dm. Fracture surfaces of all specimens, except of the standard one, exhibited intergranular morphology. The fracture toughness values increased with increasing dm whereas the absorbed energy decreased. The increase in KIc values is explained in terms of the crack driving force reduction caused by the intergranularly induced crack tip shielding. The inverse behavior of impact test specimens is associated with a low resistance of coarse grained structures against crack nucleation. Separation of the extrinsic shielding effect from the measured KIc values by using a 3D model of the intergranular crack front resulted in a comparable intrinsic fracture toughness of all investigated steel grades.

Anglický abstrakt

Values of initial fracture toughness KIc and impact absorbed energy of ultra-high strength low alloy steel were determined for 6 different heat treatments leading to 3 different mean prior austenite grain sizes dm. Fracture surfaces of all specimens, except of the standard one, exhibited intergranular morphology. The fracture toughness values increased with increasing dm whereas the absorbed energy decreased. The increase in KIc values is explained in terms of the crack driving force reduction caused by the intergranularly induced crack tip shielding. The inverse behavior of impact test specimens is associated with a low resistance of coarse grained structures against crack nucleation. Separation of the extrinsic shielding effect from the measured KIc values by using a 3D model of the intergranular crack front resulted in a comparable intrinsic fracture toughness of all investigated steel grades.

Klíčová slova

fracture toughness, impact absorbed energy, ultra-high strength low alloy steel, shielding effect

Klíčová slova v angličtině

fracture toughness, impact absorbed energy, ultra-high strength low alloy steel, shielding effect

Autoři

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

Vydáno

01.01.2001

Nakladatel

SF2M Les Fontelles

Místo

Les Fontelles

Kniha

Charpy Centenary Conference 2001

Strany od

465

Strany počet

8

BibTex

@inproceedings{BUT3655,
  author="Jaroslav {Pokluda} and Bohumil {Vlach} and Pavel {Šandera} and Ladislav {Jurášek}",
  title="Antagonism in Fracture and Notch Toughness of UHSLA Steels",
  booktitle="Charpy Centenary Conference 2001",
  year="2001",
  pages="8",
  publisher="SF2M Les Fontelles",
  address="Les Fontelles"
}