Fracture Mechanics and Strength of Materials

Simulation of Creep Crack Growth under the Action of Neutron Irradiation

Iryna Dolinska1, Orest Svirchevskyi (orest.sv@gmail.com)2

1. Karpenko Physico-Mechanical Institute of NAS of Ukraine
2. Ivan Franko Lviv National University

https://doi.org/10.15407/msse2023.184

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Keywords

neutron irradiation, creep crack, mathematical model, residual lifetime

Abstract

A mathematical model is proposed for estimating the period of subcritical growth of a high-temperature creep crack in materials subjected to neutron irradiation and long-term static loading. The model is based on the energy approach regarding the balance of energy components and the balance of the rates of change of energy components. By presenting the creep rate as linearly dependent on the irradiation dose, a new differential equation of high-temperature creep crack propagation in metals is obtained, taking into account the intense influence of irradiation. The residual durability of a through-crack plate made of 304 steel was evaluated.

References

  1. Andreykiv O.Ye., Skalskyi V.R. and Dolinska I.Ya. Slow fracture of materials under local creep. – Lviv: LNU, 2017. – 400 p. (in Ukrainian)
  2. Holt R.A. In-reactor deformation of cold-worked Zr-2.5Nb pressure tubes // J. of Nuclear Materials. – 2008. – № 372. – P. 182-214. https://doi.org/10.1016/j.jnucmat.2007.02.017
  3. Chopra O.K. and Shack W.J. Crack growth rates and fracture toughness of irradiated austenitic stainless steels in BWR environments. – Argonne: Argonne National Laboratory, 2008. – 142 p. https://doi.org/10.2172/932944