Proceedings ArticleDOI
Ultrasonic nondestructive evaluation of solid-solid bonds
R. B. Thompson,O. Buck,D.K. Rebhein,Frank J. Margetan,T. A. Gray +4 more
- pp 1117-1123
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TLDR
In this paper, a discussion of theories for the interaction of ultrasound with such distributed defects, results of model experiments designed to validate the theories, and applications of techniques based on the resulting understanding to fracture studies of bonded surfaces and to inspection of aircraft engine turbine rotors.Abstract:
The solid-state bonding of metals, e.g. diffusion bonding, friction welding, and inertial welding, is finding increasing use in the fabrication of structural components. A summary is presented of recent progress toward the development of nondestructive techniques to monitor the quality of such bonds. Emphasis is placed on the characterization of a particular microstructural origin of bond weakness, a distributed array of microcracks in the bond plane. Included is a discussion of theories for the interaction of ultrasound with such distributed defects, results of model experiments designed to validate the theories, and applications of techniques based on the resulting understanding to fracture studies of bonded surfaces and to inspection of aircraft engine turbine rotors. >read more
Citations
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Journal ArticleDOI
Characterization of digital waveforms using thermodynamic analogs: applications to detection of materials defects
Michael S. Hughes,Jon N. Marsh,Christopher S. Hall,David Savery,Gregory M. Lanza,S.A. Wickline +5 more
TL;DR: Analysis based on thermodynamic quantities is capable of detecting differences between digital signals that are undetectable by conventional methods of characterization based on peak-to-peak amplitude or signal energy.
Journal ArticleDOI
Evaluation of Discontinuities in A36 Steel Repairs with Friction Hydro Pillar Processing Using Different Axial Forces
Felipe Wu Tzong Yeh,Pedro Henrique Costa Pereira da Cunha,Cleber Rodrigo de Lima Lessa,Thomas Gabriel Rosauro Clarke,Telmo Roberto Strohaecker +4 more
TL;DR: Agaranha et al. as mentioned in this paper presented the results of a study at the LAMEF Laboratorio de Metalurgia Fisica (LAMEF-Fisica) in Porto Alegre, Brazil.
Proceedings ArticleDOI
Non-destructive photoacoustic detecting method for high-speed rail surface defects
TL;DR: It has been proved that the established photoacoustic detecting method for high-speed rail surface detection is an effective and non-destructive detecting technology.
ReportDOI
Overview of Mathematical Modeling in Nondestructive Evaluation (NDE)
TL;DR: A broad overview of mathematical modeling in nondestructive evaluation (NDE) can be found in this paper, where the primary emphasis is to expand the review of NDE modeling literature covered by previous general works.
Proceedings ArticleDOI
Ex vivo measurements of mechanical properties of myocardium using Lamb and Rayleigh wave dispersion velocities
TL;DR: In this paper, the authors investigated the feasibility of using the Shearwave Dispersion Ultrasound Vibrometry (SDUV) method to estimate tissue viscoelasticity.
References
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Journal ArticleDOI
Ultrasonic scattering from imperfect interfaces: A quasi-static model
Jai-Man Baik,R. Bruce Thompson +1 more
TL;DR: In this article, a quasi-static model for ultrasonic transmission and reflection at imperfect interfaces is developed, where the interface is represented by a distributed spring determined by the change in static compliance of the medium with respect to one with a perfect interface, and a distributed mass, representing excess mass at the interface.
Journal ArticleDOI
Reflection and Transmission of Elastic Waves by a Periodic Array of Cracks
Y. C. Angel,Jan Drewes Achenbach +1 more
TL;DR: In this article, l'interaction d'ondes elastiques avec une serie plane de fissures a espacements periodiques d'egales longueurs is studied.
Journal ArticleDOI
Interfacial Spring Model for Ultrasonic Interactions with Imperfect Interfaces: Theory of Oblique Incidence and Application to Diffusion-Bonded Butt Joints
TL;DR: In this paper, the quasi-static distributed spring model is used to derive the ultrasonic reflectivity of an imperfectly-bonded interface as a function of frequency and angle of incidence.
Journal ArticleDOI
Nondestructive characterization of the mechanical strength of diffusion bonds. I. Experimental results
TL;DR: The application of ultrasonic reflectivity for the characterization of a variety of copper diffusion bonds is described in this paper, where the quality of each diffusion bond has been described by its ultimate tensile strength.
Journal ArticleDOI
Contacting surfaces: A problem in fatigue and diffusion bonding
TL;DR: In this paper, the authors deal with the non-destructive evaluation of the topology of contact and with the use of this information to predict the effects that loads borne by these contacts have on mechanical properties.