Nondestructive testing technique using Rayleigh waves to measure case depth of carburized steel
- Texas A and M Univ., Fort Worth, TX (United States)
The main purpose of this research was to use the non-destructive, non-contact fiber tip interferometer (FTI) detection system to record Rayleigh waves and to study the phase velocity of these waves in carburized steel. The fiber tip interferometer is part of the generation/detection system referred to as the Thermal Acoustic Photonic NDE (TAP-NDE) approach to ultrasonic testing developed at Texas A and M University. This research extends the possible list of methods for non-destructive case depth measurement. Few experimental investigations have been documented on the study of Rayleigh wave dispersion in gradient materials. Phase velocities have been with ultrasonic contact transducers or, more recently, critical angle reflectivity. The ultrasonic transducers requires contact with the surface under investigation and the critical angle reflectivity method requires the surface to be immersed in water. This research uses the fiber tip interferometer (FTI), which is non-contact, needs no immersion of the part, and is small enough to be able to interrogate surfaces with complex geometries, such as the side of a gear tooth. The FTI system provides a method for accurate phase velocity measurement at minute points, thus change over a very small area can be detected. This research, then, combines the technologies of gradient materials research and non-destructive case depth measurement research, to allow the knowledge of waves in gradient materials to be used for industrial applications. This research is a part of an on-going effort in the study of wave propagation in solids using the fiber tip interferometer and other laser-based systems at the Photomechanics Laboratory at Texas A and M University under the direction of C. P. Burger.
- OSTI ID:
- 207965
- Report Number(s):
- CONF-9510265-; ISBN 1-57117-013-8; TRN: IM9616%%293
- Resource Relation:
- Conference: 1995 American Society for Nondestructive Testing (ASNT) fall conference and quality testing show, Dallas, TX (United States), 16-20 Oct 1995; Other Information: PBD: 1995; Related Information: Is Part Of ASNT 1995 fall conference and quality testing show: NDT -- The lone star of quality; PB: 204 p.
- Country of Publication:
- United States
- Language:
- English
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