Zircaloy-4 cladding hydride reorientation under ring compression test conditions
Résumé
Temperature increase induces partial or total dissolution of Zirconium hydrides. After
this dissolution phase, a cool down under applied stresses can promote radial precipitation of hydrides. Radial hydrides are known to have a deleterious impact on the cladding strength and ductility. The objective of this study is to evaluate, using ring compression tests (RCT), the required stress level leading to the formation of radial hydrides within the cladding during a thermal-mechanical transient. The obtained results are in good agreement with literature data obtained using different specimen geometry. The tests provide quantitative information on the radial hydride induced embrittlement. Ring compression test appears to be an efficient tool for hydride reorientation analysis.
Domaines
Sciences de l'ingénieur [physics]
Origine : Fichiers produits par l'(les) auteur(s)