Finite-element modelling of elastic wave propagation and scattering within heterogeneous media

A Van Pamel, G Sha, SI Rokhlin… - Proceedings of the …, 2017 - royalsocietypublishing.org
The scattering treated here arises when elastic waves propagate within a heterogeneous
medium defined by random spatial fluctuation of its elastic properties. Whereas classical …

[HTML][HTML] Numerical and analytic modelling of elastodynamic scattering within polycrystalline materials

A Van Pamel, G Sha, MJS Lowe… - The Journal of the …, 2018 - pubs.aip.org
The elastodynamic behavior of polycrystalline cubic materials is studied through the
fundamental propagation properties, the attenuation and wave speed, of a longitudinal …

Nondestructive testing of additively manufactured material based on ultrasonic scattering measurement

Y Song, X Zi, Y Fu, X Li, C Chen, K Zhou - Measurement, 2018 - Elsevier
To improve ultrasonic testing capability for additively manufactured materials, extreme value
statistics is employed to calculate the experimental confidence bounds of structural noise …

Shape effect of elongated grains on ultrasonic attenuation in polycrystalline materials

L Yang, OI Lobkis, SI Rokhlin - Ultrasonics, 2011 - Elsevier
Longitudinal and transverse wave attenuation coefficients are obtained in a simple integral
form for ultrasonic waves in cubic polycrystalline materials with elongated grains …

Effect of texture and grain shape on ultrasonic backscattering in polycrystals

J Li, L Yang, SI Rokhlin - Ultrasonics, 2014 - Elsevier
An ultrasonic backscattering model is developed for textured polycrystalline materials with
orthotropic or trigonal grains of ellipsoidal shape. The model allows us to simulate realistic …

Ultrasonic backscattering in polycrystals with elongated single phase and duplex microstructures

OI Lobkis, L Yang, J Li, SI Rokhlin - Ultrasonics, 2012 - Elsevier
An analytical solution for a three dimensional integral representation of the backscattering
(BS) coefficient in polycrystals with elongated (generally ellipsoidal) grains is obtained; it is a …

Ultrasonic map** of hybrid additively manufactured 420 stainless steel

LD Sotelo, H Hadidi, CS Pratt, MP Sealy, JA Turner - Ultrasonics, 2021 - Elsevier
Metal hybrid additive manufacturing (AM) processes are suitable to create complex
structures that advance engineering performance. Hybrid AM can be used to create …

Diffuse ultrasonic backscatter at normal incidence through a curved interface

G Ghoshal, JA Turner - The Journal of the Acoustical Society of …, 2010 - pubs.aip.org
Diffuse ultrasonic backscatter techniques are useful for probing heterogeneous materials to
extract microstructural parameters and detect flaws which cannot be detected by …

Comparison of experimental measurements of material grain size using ultrasound

J Zhang, Y Song, X Li, CH Zhong - Journal of Nondestructive Evaluation, 2020 - Springer
Material grain size is related to metallic material properties and its elastic behaviour.
Measuring and monitoring material grain size in material manufacturing and service is an …

Characterization of polycrystals with elongated duplex microstructure by inversion of ultrasonic backscattering data

OI Lobkis, SI Rokhlin - Applied Physics Letters, 2010 - pubs.aip.org
In this letter a simple analytical ultrasonic backscattering model is proposed for
determination of characteristic microstructural scales in polycrystalline materials with …