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Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy

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Reconstructing Internal Temperature Distributions From Ultrasonic Time-of-Flight Tomography And Dimensional Resonance

S J Norton¹, L R Testardi¹, H N G Wadley¹

¹National Bureau of Standards, Washington, DC 20234.

Journal of Research of the National Bureau of Standards (1977)

|September 27, 2021

Summary

This summary is machine-generated.

Two ultrasonic methods, time-of-flight tomography and dimensional resonance profiling, reconstruct internal metal temperatures. A combination is best for rectangular shapes, while tomography suits cylinders.

Keywords:

dimensional resonance metals processing process control temperature distribution sensor tomography ultrasound

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Area of Science:

Materials Science
Non-Destructive Testing
Thermal Engineering

Background:

Accurate internal temperature measurement in metals is crucial for process control and material integrity.
Existing methods may have limitations in geometry or resolution.

Purpose of the Study:

To describe and evaluate two ultrasonic techniques for internal temperature reconstruction in metal bodies.
To compare the suitability of these techniques for different geometries.

Main Methods:

Time-of-flight tomography: Measures temperature distribution by analyzing ultrasonic wave travel times.
Dimensional resonance profiling: Reconstructs temperature profiles from resonant frequency measurements.

Main Results:

Tomographic reconstruction analysis, including refraction effects, was performed for cylindrical bodies.
Initial experimental results for time-of-flight tomography were presented.
Dimensional resonance profiling demonstrated its capability for 1D temperature reconstruction.

Conclusions:

Time-of-flight tomography is effective for cylindrical geometries.
A combined approach of dimensional resonance and tomography offers the best solution for rectangular slabs.