Lab 2.2: Non-destructive Testing Using Ultrasound

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Questions and Answers

What is the objective of Lab 2.2?

To deal with various techniques for non-destructive material testing using ultrasound.

What are the main types of ultrasonic waves?

  • Transverse wave (correct)
  • Electromagnetic wave
  • Longitudinal wave (correct)
  • Sound wave

High frequency sound waves can propagate through a vacuum.

False (B)

What does the term 'Ultra' refer to in ultrasonics?

<p>The frequency range of sound that is above the hearing level of humans (20 kHz).</p> Signup and view all the answers

Ultrasonic testing can visualize __________ defects in materials.

<p>macroscopic</p> Signup and view all the answers

What types of devices are used in the experiments for ultrasonic testing?

<p>Automated testing devices (A), Hand-held ultrasonic sensors (D)</p> Signup and view all the answers

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Study Notes

Lab Overview

  • Lab 2.2 focuses on non-destructive material testing using ultrasound to identify defects and measure geometric dimensions of components.
  • Applications include detecting macroscopic material defects such as pores, cracks, and inclusions, as well as measuring wall and coating thicknesses.
  • Utilizes handheld ultrasonic sensors and automated testing devices for experimentation.

Ultrasonic Testing

  • High-frequency sound waves characterize internal structures without damaging materials.
  • Sound acts as a mechanical wave produced by vibrations of particles in various mediums (solid, liquid, gas).
  • Frequencies above 20 kHz are classified as "ultrasonic," beyond human hearing ability.
  • Wave propagation involves particle vibrations around a resting position which transfer motion to adjacent particles.
  • The propagation speed of sound is termed as "speed of sound (c)," varying by the medium.

Types of Waves

  • Two main types of ultrasonic waves:
    • Longitudinal Waves: Particles oscillate parallel to the wave propagation direction.
    • Transverse Waves: Particles oscillate perpendicular to the wave propagation direction.

Experimental Focus

  • Wall thickness and defect location determination are key experiments within this lab.
  • Calibration of sound velocity is essential for accurate measurements.
  • Includes automated robot-based testing solutions for efficiency and precision in material inspection.

Additional Topics

  • Acoustic microscopy as a method for enhanced imaging of material structures.
  • Phased Array ultrasonic technology to facilitate advanced testing techniques and data acquisition.

Contact Information

  • Prof. Dr.-Ing. Robert Schmitt leads the Chair of Metrology and Quality Management, overseeing the lab and research initiatives.

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