Author: Grange M. Besson J. Andrieu E.
Publisher: Springer Publishing Company
ISSN: 1543-1940
Source: Metallurgical and Materials Transactions A, Vol.31, Iss.3, 2000-03, pp. : 679-690
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Abstract
The mechanical behavior of ZIRCALOY-4 sheets is investigated at room temperature. The effect of hydride precipitation on the mechanical behavior and on the rupture mechanism is also studied, in the range from 200 to 1200 wt ppm hydrogen and for different stress triaxialities. It is shown that the material exhibits a strong anisotropy due to its pronounced texture, and that its mechanical properties depend on the strain rate. Hydride precipitation appears to have no effect on the anisotropy or on the strain-rate sensitivity, in the range from 10-4 to 10-2 s-1. The main effect of hydrogen is the reduction of the ductility and of crack resistance. The ductile rupture mechanism is studied, focusing on the stage of damage nucleation by hydride fracture.Observations during scanning electron microscopy (SEM)
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