Simulation of Ultrasonic Backscattering in Polycrystalline Microstructures

2Citations
Citations of this article
12Readers
Mendeley users who have this article in their library.

Abstract

Ultrasonic testing of polycrystalline media relies heavily on simulation of the expected signals in order to detect and correctly interpret deviations due to defects. Many effects disturb ultrasonic waves propagating in polycrystalline media. One of them is scattering due to the granular microstructure of the polycrystal. The thus arising so-called microstructural noise changes with grain size distribution and testing frequency. Here, a method for simulating this noise is introduced. We geometrically model the granular microstructure to determine its influence on the backscattered ultrasonic signal. To this end, we utilize Laguerre tessellations generated by random sphere packings dividing space into convex polytopes—the cells. The cells represent grains in a real polycrystal. Cells are characterized by their volume and act as single scatterers. We compute scattering coefficients cellwise by the Born approximation. We then combine the Generalized Point Source Superposition technique with the backscattered contributions resulting from the cell structure to compute the backscattered ultrasonic signal. Applying this new methodology, we compute the backscattered signals in a pulse-echo experiment for a coarse grain cubic crystallized Inconel-617 and a fine grain hexagonal crystallized titanium. Fitting random Laguerre tessellations to the observed grain structure allows for simulating within multiple realizations of the proposed model and thus to study the variation of the backscattered signal due to microstructural variation.

References Powered by Scopus

Communication in the Presence of Noise

5782Citations
N/AReaders
Get full text

Statistical Analysis and Modelling of Spatial Point Patterns

1592Citations
N/AReaders
Get full text

FFTW: An adaptive software architecture for the FFT

1565Citations
N/AReaders
Get full text

Cited by Powered by Scopus

Ultrasonic backscattering model of lamellar duplex phase microstructures in polycrystalline materials

0Citations
N/AReaders
Get full text

USE OF BACKSCATTERING ULTRASOUND PARAMETERS FOR IRON ORE VARIETIES RECOGNITION

0Citations
N/AReaders
Get full text

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Cite

CITATION STYLE

APA

Dobrovolskij, D., & Schladitz, K. (2022). Simulation of Ultrasonic Backscattering in Polycrystalline Microstructures. Acoustics, 4(1), 139–167. https://doi.org/10.3390/acoustics4010010

Readers over time

‘22‘23‘2502468

Readers' Seniority

Tooltip

PhD / Post grad / Masters / Doc 5

100%

Readers' Discipline

Tooltip

Engineering 4

80%

Agricultural and Biological Sciences 1

20%

Save time finding and organizing research with Mendeley

Sign up for free
0