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Journal of Materials Science

, Volume 28, Issue 4, pp 927–930 | Cite as

Recrystallization-etch approach to study the plastic energy absorbtion at crack initiation and extension of pressure-vessel steel A533B-1

  • X. Mao
  • T. Shoji
Papers

Abstract

To evaluate the elastic-plastic fracture toughness parameter of nuclear pressure-vessel steel A533B-1, a newly developed technique (the recrystallization-etch technique) for plastic strain measurement was applied to different sizes of compact tension specimens with a crack length/specimen width of 0.6–0.5 that were tested to generate resistance curves for stable crack extensions. By means of the recrystallization-etch technique, the plastic energy dissipation or work done within an intense strain region at the crack tip during crack initiation and extension was measured experimentally. Furthermore, the thickness effects on this crack tip energy dissipation rate were examined in comparison with other fracture-parameter J integrals. Thickness effects on critical energy dissipation and energy dissipation rate during crack extension were obtained and the energy dissipation rate dWp/da in the mid-section shows a constant value irrespective of specimen geometry and size, which can be used as a fracture parameter or crack resistance property.

Keywords

Fracture Toughness Crack Initiation Crack Extension Energy Dissipation Rate Compact Tension Specimen 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1993

Authors and Affiliations

  • X. Mao
    • 1
  • T. Shoji
    • 2
  1. 1.Department of Mechanical EngineeringThe University of CalgaryCalgaryCanada
  2. 2.Research Institute for Fracture TechnologyTohoku UniversitySendaiJapan

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