The c loop density evolution is more complicated and doesn't display any particular trend. ![]() This trend is also inferred from a Williamson-Hall representation but contradicts the TEM observations. Most interestingly, the diffraction analysis suggests that the total dislocation density, as well as the a loop density, increases with fluence for the cladding material type. Absolute dislocation density values are about 4–15 times higher for the whole peak profile compared to TEM analysis. The samples available for this characterization were taken from high burnup fuel assemblies and offer insight into the evolution of the dislocation structure after the formation of dislocation loops containing a c component. ![]() Dislocation structures in neutron irradiated Zircaloy-2 fuel cladding and channel material have been characterized by means of high-resolution synchrotron x-ray diffraction combined with whole peak profile analysis and by transmission electron microscopy (TEM).
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