Detail publikačního výsledku

Progress in understanding of intrinsic resistance to shear-mode fatigue crack growth in metallic materials

VOJTEK, T.; POKLUDA, J.; HOHENWARTER, A.; PIPPAN, R.

Originální název

Progress in understanding of intrinsic resistance to shear-mode fatigue crack growth in metallic materials

Anglický název

Progress in understanding of intrinsic resistance to shear-mode fatigue crack growth in metallic materials

Druh

Článek WoS

Originální abstrakt

Recently made experiments allowed measurement of effective data (free of crack tip shielding) and enabled a better understanding of intrinsic behaviour of shear-mode cracks. Influence of crystal structure and microstructure was distinguished. Experimental results for niobium showed that growth micromechanisms and effective thresholds (ΔKIIeff,th ~ 1.0 MPa m1/2, ΔKIIIeff,th ~ 1.4 MPa m1/2) of modes II and III cracks were different, which was also observed in other metals. Validity of the simple formula for mode II effective threshold for single-phase metals based on the dislocation emission model was confirmed. The cracks propagated in a coplanar manner along the maximum shear plane, which is a characteristic behaviour for bcc metals. Model of propagation of remote mode III loaded cracks by local mode II advances was confirmed.

Anglický abstrakt

Recently made experiments allowed measurement of effective data (free of crack tip shielding) and enabled a better understanding of intrinsic behaviour of shear-mode cracks. Influence of crystal structure and microstructure was distinguished. Experimental results for niobium showed that growth micromechanisms and effective thresholds (ΔKIIeff,th ~ 1.0 MPa m1/2, ΔKIIIeff,th ~ 1.4 MPa m1/2) of modes II and III cracks were different, which was also observed in other metals. Validity of the simple formula for mode II effective threshold for single-phase metals based on the dislocation emission model was confirmed. The cracks propagated in a coplanar manner along the maximum shear plane, which is a characteristic behaviour for bcc metals. Model of propagation of remote mode III loaded cracks by local mode II advances was confirmed.

Klíčová slova

Modes II and III cracks, Effective threshold, Micromechanisms, 3D fractography, Niobium

Klíčová slova v angličtině

Modes II and III cracks, Effective threshold, Micromechanisms, 3D fractography, Niobium

Autoři

VOJTEK, T.; POKLUDA, J.; HOHENWARTER, A.; PIPPAN, R.

Rok RIV

2017

Vydáno

04.10.2016

Nakladatel

Elsevier

ISSN

0142-1123

Periodikum

International Journal of Fatigue

Svazek

89

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

36

Strany do

42

Strany počet

7

BibTex

@article{BUT129022,
  author="Tomáš {Vojtek} and Jaroslav {Pokluda} and Anton {Hohenwarter} and Reinhard {Pippan}",
  title="Progress in understanding of intrinsic resistance to shear-mode fatigue crack growth in metallic materials",
  journal="International Journal of Fatigue",
  year="2016",
  volume="89",
  number="1",
  pages="36--42",
  doi="10.1016/j.ijfatigue.2016.01.009",
  issn="0142-1123"
}