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Nonlinear Ultrasonic Parameter in Precipitate-Hardened Steels
Published
Author(s)
Donna C. Hurley, Davor Balzar, P T. Purtscher
Abstract
We have investigated several specimens of ASTM A710 steel containing copper-rich precipates with variations in the final aging treatment. X-ray diffraction line-broadening and small-angle neutron-scattering experiments revealed the existence of the precipitates and associated coherency strain. We determined the nonlinear ultrasonic parameter Β for each specimen by harmonic- generation experiments and measured the ultrasonic longitudinal velocity ŅL and attenuation αL. Although ŅL and αL showed no consistent trends, Β increased with increasing strain. This correlation is compared to a microstructural model for harmonic generation that includes a contribution from precipitate-pinned dislocations.
Hurley, D.
, Balzar, D.
and Purtscher, P.
(1999),
Nonlinear Ultrasonic Parameter in Precipitate-Hardened Steels, Nondestructive Characterization of Materials
(Accessed May 29, 2023)