|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Mechanical Behavior and Degradation of Advanced Nuclear Fuel and Structural Materials
||Through-thickness Microstructure Characterization in a Centrifugally Cast Austenitic Stainless Steel Nuclear Reactor Primary Loop Pipe Using Time-of-flight Neutron Diffraction
||Matthew Schmitt, Daniel Savage, James Wall, John Yeager, Chanho Lee, Sven Vogel
|On-Site Speaker (Planned)
Inspection of centrifugally cast austenitic stainless steel pipe, commonly used in primary cooling loops in light-water nuclear reactors, using ultrasonic techniques is not reliable as the microstructure strongly attenuates ultrasonic waves. In order to account for elastic anisotropy in the material, the texture in the steel was measured as a function of radial distance though the pipe wall using the HIPPO time-of-flight neutron diffractometer at the Los Alamos Neutron Science Center (LANSCE, Los Alamos, NM, USA). Strong textures dominated by a small number of austenite grains with their (100) direction aligned in the radial direction of the pipe were observed. ODF analysis indicated that up to 70% of the probed volume was occupied by just three single-grain orientations, consistent with grain sizes of almost 1 cm. Texture and phase fraction of both ferrite and austenite phases were measured along the length of the samples.
||Iron and Steel, Characterization, Nuclear Materials