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Proceedings Paper

Ultrasonic phased array sound field mapping through large-bore coarse grained cast austenitic stainless steel (CASS) piping materials
Author(s): A. D. Cinson; S. L. Crawford; M. S. Prowant; A. A. Diaz; J. E. Hathaway; M. T. Anderson
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Paper Abstract

A sound field beam mapping exercise was conducted to further understand the effects of coarse-grained microstructures found in cast austenitic stainless steel (CASS) materials on phased array ultrasonic wave propagation. Laboratory measurements were made on three CASS specimens with different microstructures; the specimens were polished and etched to reveal measurable grain sizes, shapes, and orientations. Three longitudinal, phased array probes were fixed on a specimen's outside diameter with the sound field directed toward one end (face) of the pipe segment over a fixed range of angles. A point receiver was raster scanned over the surface of the specimen face generating a sound field image. A slice of CASS material was then removed from the specimen end and the beam mapping exercise repeated. The sound fields acquired were analyzed for spot size, coherency, and beam redirection. Qualitative analyses were conducted between the resulting sound fields and the microstructural characteristics of each specimen.

Paper Details

Date Published: 4 April 2012
PDF: 11 pages
Proc. SPIE 8347, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012, 83471A (4 April 2012); doi: 10.1117/12.917329
Show Author Affiliations
A. D. Cinson, Pacific Northwest National Lab. (United States)
S. L. Crawford, Pacific Northwest National Lab. (United States)
M. S. Prowant, Pacific Northwest National Lab. (United States)
A. A. Diaz, Pacific Northwest National Lab. (United States)
J. E. Hathaway, Pacific Northwest National Lab. (United States)
M. T. Anderson, Pacific Northwest National Lab. (United States)


Published in SPIE Proceedings Vol. 8347:
Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012
Andrew L. Gyekenyesi, Editor(s)

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