|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Application Utilizing Test Reactors, Ion Beam Facilities and Integrated Modeling
||Characterizing the Defect Structure and Defect Density in Neutron and Proton Irradiated Zr Alloys by X-ray Line Profile Analysis
||Tamás Ungár, Gábor Ribárik, Matthew Tpping, Rebecca Johns, Rory Hulse, Hattie Xiao Dan Xu, Levente Balogh, Philipp Frankel, Christopher Race, Michael Preuss
|On-Site Speaker (Planned)
The most prominent defects created by neutron irradiation in Zr alloys are dislocation loops. At first, vacancy and interstitial a-type loops form on prismatic planes. Later c-type loops form on basal planes. Dislocation loops are related to irradiation-induced growth in Zr cladding, therefore the characterization of their nature and density is essential for understanding dimensional instabilities. Electron microscopy (EM) is one of the most powerful tools for characterization of the defect structure of irradiated Zr alloys. X-ray and neutron diffraction line profile analysis (LPA) has been the alternative method used parallel to (EM) for determining irradiation damage in Zr alloys. However, discrepancies between EM and LPA and difficulties in interpreting asymmetries and humps in diffraction peak profiles have put LPA into the background. Here we present a new and comprehensive model for diffraction patterns, eliminating uncertainties in interpretation, and refining LPA to become a tool complementary to EM.
||Planned: Supplemental Proceedings volume