Propagation characteristics of SH ultrasonic waves through the surface depth of an isotropic medium

• Published in: NDT & E international : independent nondestructive testing and evaluation Vol. 31; no. 3; pp. 201 - 210
• Main Authors: Fukuhara, Mikio, Kuwano, Yoshiyuki
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.06.1998; Elsevier Science
• Subjects: Acoustical measurements and instrumentation; Acoustics; Analysing. Testing. Standards; Applied sciences; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Materials science; Materials testing; Metals. Metallurgy; Nondestructive testing; Nondestructive testing: ultrasonic testing, photoacoustic testing; Physics; probe for surface variation; SH waves; surface depth diffraction; Testing for defects; surface depth diffraction; SH waves; probe for surface variation; Wave diffraction; Nondestructive testing; Wave scattering; Ultrasonic waves; Measuring methods; SH wave; Surface treatments; Modelling; Wave damping; Bistatic scattering; Elastic waves; Steels
• ISSN: 0963-8695; 1879-1174
• DOI: 10.1016/S0963-8695(97)00040-6

The propagation characteristics of SH waves passing from the surface through an isotropic medium were investigated by adjusting the incident and receiving angles of two SH wave transducers. Approximately 70% of the total SH wave energy reached a depth of 2 mm when the incident adn receiving angles were 24 and 25°, respectively. This phenomenon can be explained easily if the wave diffraction pattern between the transmitter and the receiver is assumed to take an angular path. SH wave attenuation provides a sensitive probe for determining variations in the hardness of surfaces arising from the accumulation of elastic strain and transformation products.