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Title: Deformation mechanisms and inter-granular stresses in Zircaloy-4 and Zr-2.5%Nb
Author: Zanellato, Olivier
ISNI:       0000 0004 2676 9854
Awarding Body: Open University
Current Institution: Open University
Date of Award: 2009
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Zirconium alloys have interesting properties for structural applications in the core of a nuclear reactor: they are transparent to neutrons and have good mechanical and corrosion properties. Zircaloy-4 is used for tube cladding or pressure vessels while the main application of Zr2.5%Nb is pressure tubes. However the crystal structure of the dominant phase at room temperature is hexagonal close packed (hep) and shows a very strong thermo-mechanical anisotropy that can affect the deformation behaviour of a polycrystal aggregate and give rise to intergranular stresses. It is particularly important to understand the deformation mechanisms at the microscopic length-scale both for processing optimisation and for service life predictions and improvements.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral