Measuring and testing – Vibration – By mechanical waves
Patent
1981-05-28
1984-03-13
Kreitman, Stephen A.
Measuring and testing
Vibration
By mechanical waves
73 1DV, G01N 2904
Patent
active
044359845
ABSTRACT:
A reliable ultrasonic method for testing inner diameter cladded pipe adjacent to welds comprising use of multiple beams, bands and pulses in addition to pulseshaping and beamforming, spectral and directional averaging, as well as spatial filtering and pattern recognition. An automated inspection mode aims short shear-wave pulses from different source locations and different beam orientations to detect signals characteristic of defects. A manual confirmation mode aims both longitudinal waves and shear waves at the suspected defect and analyzes the detected returned pulses by an associated pulse pattern recognition method.
REFERENCES:
patent: 3683680 (1972-08-01), Johnson et al.
patent: 3972228 (1976-08-01), Mansson
O. Ganglbauer et al., "Contributions to the Ultrasonic Testing of Austenitic Welds using Longitudinal Angle-Beam Probes", Ninth World Conference on Nondestructive Testing, pp. 1-6, Oct. 1979.
G. J. Gruber et al., "Reliability Evaluation of Six Ultrasonic Techniques for Cladded Pipe Examinations", Proceedings of 11th Nuclear Power Ed. Sem., Apr. 20, 1981, pp. 1--35.
G. J. Gruber et al., "Detection of Surface Cracks in Bimetallic Coarse-Grained Structures", pp. 1-58, Dec. 1980.
R. J. Hudgell et al., "Ultrasonic Longitudinal Wave Examination of Austenitic Welds", British Journal of NDT, 22, pp. 78-85, Mar. 1980.
D. S. Kupperman et al., "Effects of Microstructure on Ultrasonic Examination of Stainless Steel", Proceed. Cnsi. Spec. Meeting Ultra Insp. Reac. Comp., pp. 1-16, Sep. 1976.
D. S. Kupperman et al., "Effect of Shear Wave Polarization on Defect Detection in Stainless Steel Weld Metal", Ultrasonics, 16, pp. 21-27, Jan. 1978.
P. Caussin et al., "Factors Affecting Reliability Ultrasonic Exam. of Austenitic Components"Proceed Cnsi. Spec. Meeting Ultra Insp. Reac. Comp., pp. 421-440, May 1980.
B. Trumpff et al., "Contribution Improving Ultrasonic Test of Thick Bimetallic Welds", Proceed Cnsi. Spec. Meeting Ultra Insp. Reac. Comp., pp. 25-39, May 1980.
X. Edelmann, "Practical Application of Ultrasonic Testing of Austenitic Weld Joints", Materials Evaluation, pp. 47-51, Sep. 1979.
N. V. Vindogradov et al., "Dissipation of Ultrasonic Oscillations at Boundary Layers of Bimetal made by Explosive Welding", Soviet Journal NDT, 12, pp. 647-651, Dec. 1976.
Kreitman Stephen A.
Southwest Research Institute
LandOfFree
Ultrasonic multiple-beam technique for detecting cracks in bimet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ultrasonic multiple-beam technique for detecting cracks in bimet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrasonic multiple-beam technique for detecting cracks in bimet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-486443