Laser ultrasonic studies of solid{endash}liquid interfaces

Journal Article · Sat Feb 01 04:00:00 EST 1997 · Journal of the Acoustical Society of America

DOI:https://doi.org/10.1121/1.418042· OSTI ID:451051

Queheillalt, D T; Lu, Y; Wadley, H N ^[1]

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1. Intelligent Processing of Materials Laboratory, School of Engineering and Applied Science, University of Virginia, Charlottesville, Virginia 22903 (United States)

A laser ultrasonic approach has been developed and used to measure the time-of-flight (TOF) for rays penetrating model cylindrical solid{endash}liquid interfaces. Since the longitudinal acoustic wave speed in the solid is 45% higher than the liquid, TOF measurements for ultrasonic rays that propagate through the interface are found to be sensitive to the instantaneous position and shape of the interface. A ray tracing code (incorporating both interface refracted and creeping rays) has predicted the ray paths and their time-of-flights as a function of axial position for opposingly aligned source/receiver points on the diametral plane. When used in conjunction with a nonlinear least-squares method, the ray propagation model enabled reconstruction of the interface position, its convexity, and the velocities of both the liquid and solid phases from a few parallel beam TOF measurements collected on the diametral plane. {copyright} {ital 1997 Acoustical Society of America.}

• OSTI ID: 451051
• Journal Information: Journal of the Acoustical Society of America, Journal Name: Journal of the Acoustical Society of America Journal Issue: 2 Vol. 101; ISSN 0001-4966; ISSN JASMAN
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
INTERFACES
LASER RADIATION
LEAST SQUARE FIT
LIQUIDS
PHOTOACOUSTIC EFFECT
SEMICONDUCTOR MATERIALS
SOLIDIFICATION
SOLIDS
TIME-OF-FLIGHT METHOD
ULTRASONIC TESTING
VELOCITY
WAVE PROPAGATION