|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Materials and Fuels for the Current and Advanced Nuclear Reactors VII
||Effect of Grain Elastic Anisotropy on Stress Intensification at Intergranular Stress Corrosion Cracking Iinitiation Sites in Austenitic Stainless Steels and Nickel-based Alloys in Light Water Reactor Environment.
||Jean Claude van Duysen, Gabriel Meric De Bellefon
|On-Site Speaker (Planned)
||Jean Claude van Duysen
Most studies on Inter-granular Stress Corrosion Cracking (IGSCC) in Light Water Reactor environment consider the macroscopic applied stress as the relevant mechanical parameter to characterize crack initiation. Progress in understanding, modeling, and forecasting IGSCC could be made by correlating crack initiation sensitivity to the stress field at crack initiation sites. Through finite element method (FEM) calculations, the proposed article assesses this stress field in polycrystalline 316 stainless steel and identifies key parameters controlling local stress intensification. In particular, it concludes that the auxetic behavior (i.e., negative Poisson’s ratio) of 316 single crystals in some orientations plays a very important role, since it can lead to local stress intensification of about 1.6. Grain configurations that lead to the highest IGSCC sensitivity are identified. Results are applicable to other austenitic stainless steels (e.g., 304) and Ni-based alloys, in annealed, cold-worked or irradiated conditions.
||Planned: Supplemental Proceedings volume