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Modelling the interaction of crack tip with nanostructure, which creating by deformation.

Kateryna M. Borysovska 2,  Viktor N. Slunyaev 2,  Yuriy M. Podrezov 2,  Zbigniew Pakiela 1,  Krzysztof J. Kurzydlowski 1

1. Warsaw University of Technology, Faculty of Materials Science and Engineering (InMat), Wołoska 141, Warszawa 02-507, Poland
2. Institute for Problems of Materials Science, 3, Krzhizhanovsky, Kyiv 03142, Ukraine

Abstract

The fracture of nanocrystalline material was studied. The interaction of dislocation with dislocation wall near the crack tip was analyzed taking into account the image forces as well as their influence on the crack tip. The calculation results allow to estimate the influence of the shield effect of dislocation wall on the fracture toughness and J-integral. It was shown that the wall leads the substantial growth of the dislocation crowd near the crack tip, that in turn leads to increase of fracture toughness and J-integral.

 

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Presentation: poster at E-MRS Fall Meeting 2004, Symposium H, by Kateryna M. Borysovska
See On-line Journal of E-MRS Fall Meeting 2004

Submitted: 2004-04-28 14:29
Revised:   2009-06-08 12:55