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Simulating hydride embrittlement on cold-worked stress-relieved Zircaloy-4 with Gurson-Tvergaard-Needleman damage model


Congress title :SMIRT-18 International Conference on Structural Mechanics in Reactor Technology
Congress town :Pékin
Congress date :07/08/2005

Document type > *Congrès/colloque

Keywords > damage, RIA, zirconium

Research Unit > IRSN/DPAM/SEMCA/LEC

Authors > BUSSER Vincent, DESQUINES Jean, PERALES Frédéric

Publication Date > 12/08/2005

Summary

The influence of hydride precipitates on the ductility of cold-worked stress-relieved Zircaloy-4 is analyzed using a Gurson-Tvergaard-Needleman (GTN) damage model. A GTN model previously determined on recristallized and hydrided Zircaloy-4 is adapted to the cold-worked stress-relieved alloy. In a following part, the adapted model is checked by calculating the fracture toughness values of cold-worked stress-relieved Zircaloy-4 and by comparing the obtained values to literature data. The obtained GTN model demonstrated its ability to determine fracture toughness of hydrided stress-relived Zircaloy-4 with a reasonable accuracy.
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