|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Environmentally Assisted Cracking: Theory and Practice
||Correlative 3D Imaging of Iodine-induced Stress Corrosion Cracks in Zr Alloys
||Alistair Garner, Conor Gillen, Philipp Frankel
|On-Site Speaker (Planned)
Iodine-induced stress corrosion cracking (SCC) is a major degradation mechanism for zirconium alloys, used as cladding material in nuclear reactors. In order to further understand the interaction of SCC with materials microstructure, accurate 3D characterisation is essential. Complementary techniques are applied to study crack morphology and the interaction with microstructure in 3D over a range of length scales. X-ray computed tomography (XCT) is used to map the positions and general shape of cracks, generated by stressing C-ring samples in iodine-ethanol solution. These 3D images are used to target high-resolution XCT on a region of interest, to reveal the complex crack morphology. The crack tip region is then lifted out for serial sectioning analysis to relate the crack path to the microstructure and local grain orientation. The iodine distribution is also investigated using nanoscale secondary ion mass spectrometry, which allows for high-resolution 3D chemical mapping of species at extremely low concentrations.
||Planned: Supplemental Proceedings volume