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Growth of Cracks By Intergranular Cavitation in Creep

  • A. S. Argon
  • K. J. Hsia
  • D. M. Parks

Abstract

The spread of intergranular creep damage around blunt notches and sharp cracks in ductile single phase alloys is modeled by a mechanism based continuum material damage model and a finite element approach. The details of the material damage have been derived from extensive earlier experimental results on an austenitic stainless steel. The finite element simulation of the evolution of intergranular damage in the form of accumulating densities of grain boundary facet cracks has indicated that while this damage spreads out preferentially along inclined planes around the tips of sharp cracks, it localized in the symmetry plane ahead of a blunt notch. These results are in excellent agreement with the experimental observations of Ozmat, et al. on the directions of early crack growth from sharp cracks and blunt notches in Type 304 stainless steel.

Keywords

Creep Rate Grain Boundary Creep Strain Cavity Growth Creep Damage 
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Copyright information

© Springer-Verlag New York, Inc. 1992

Authors and Affiliations

  • A. S. Argon
  • K. J. Hsia
  • D. M. Parks

There are no affiliations available

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