Dynamic Deformation in Nuclear Graphite and Underlying Mechanisms.

ABSTRACT: Time-dependent deformation in nuclear graphite is influenced by the creation and migration of radiation-induced defects in the reactor environment. This study investigates the role of pre-existing defects such as point defect clusters and Mrozowski cracks in nuclear graphite IG-110. Separate specimens were irradiated with a 2.8 MeV Au²⁺ beam with a fluence of 4.38 × 10¹⁴ cm^-2 and an 8 MeV C²⁺ beam with a fluence of 1.24 × 10¹⁶ cm^-2. Microscopic specimens were either mechanically loaded inside a transmission electron microscope (TEM) or subjected to ex situ indentation-based creep loading. In situ TEM tests showed significant plasticity in regions highly localized around the Mrozowski cracks, resembling slip or ripplocation b

SUBMITTER: Thomas M 

PROVIDER: S-EPMC11433592 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature