|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials
||Investigation of Stress Corrosion Crack Initiation Sites in Alloy 600 using 3D EBSD and Local Model
||Naganand Saravanan, Phani S Karamched, Theo Simonet, Emilien Burger, Thierry Couvant, Sergio Lozano-Perez
|On-Site Speaker (Planned)
In this study, we present a detailed technique in obtaining the 3D EBSD data, reconstruction and converting it into mesh for modelling. The experiments were carried out on Alloy 600 sample by coupling the serial sectioning in Plasma FIB and electron backscatter detector (EBSD). The data is reconstructed using Dream3D software to obtain the actual 3D microstructure (with orientation). The 3D microstructure is then converted into finite element mesh for simulation using an optimized algorithm. The Crystal Plasticity Finite Element Modelling (CPFEM) is carried out on the mesh using Code Aster and Local model. The results presented show the crack initiation sites or the grain boundaries which are susceptible. This is then compared with the Alloy 600 sample exposed to SCC test in autoclave for 2000hrs with 30cc H2/kg H2O at 345°C. This novel approach opens the way to more systematic and quantitative analyses of microstructural effects on cracking.