The Pacific Northwest National Laboratory (PNNL) has been involved with nondestructive examination (NDE) of coarse-grained cast austenitic stainless steel (CASS) components for over 30 years. More recent work has focused on mapping the ultrasonic sound fields generated by low-frequency phased array probes that are typically used for the evaluation of CASS materials for flaw detection and characterization. The casting process results in the formation of large grained material microstructures that are nonhomogeneous and anisotropic. The propagation of ultrasonic energy for examination of these materials results in scattering, partitioning and redirection of these sound fields. The work reported here provides an assessment of sound field formation in these materials and provides recommendations on ultrasonic inspection parameters for flaw detection in CASS components.
Revised: September 15, 2014 |
Published: August 1, 2014
Citation
Crawford S.L., M.S. Prowant, A.D. Cinson, M.R. Larche, and A.A. Diaz. 2014.Ultrasonic Sound Field Mapping Through Coarse Grained Cast Austenitic Stainless Steel Components. In PVP 2014: 2014 Pressure Vessels & Piping Conference: Innovation and Imagination in Pressure Vessels and Piping, July 20-24, 2014, Anaheim, California, Paper No. PVP2014-28832. New York, New York:American Society of Mechanical Engineers.PNNL-SA-100834.