Nondestructive Evaluation of Materials

Millimeter Wave Doppler Sensor for Nondestructive Evaluation of Materials

INTRODUCTION Resonance modes are intrinsic characteristics of objects when excited at those frequencies. Probing the resonance signatures can reveal useful information about material composition, geometry, presence of defects, and other characteristics of the object under test. Vibration spectra can be measured remotely with high degree of sensitivity using a millimeter wave (mmW) Doppler senso...

Nondestructive Evaluation of Coatings

Bulk and Rayleigh (or surface wave) velocities of ultrasonic waves in chromium coatings on steel were measured and an experimental correlation was found between the surface velocity and the hardness. Since qualitative coating evaluation is commonly made using hardnesses as a guideline, the possibility is herewith presented of using the so und velocities of surface ultrasonic waves for this purp...

Topics On Nondestructive Evaluation Topics on Nondestructive Evaluation Series

Signal Processing in Advanced Nondestructive Materials Inspection

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Over the last decades, a large number of new and improved nondestructive testing (NDT) techniques have been successfully developed. For example, NDT techniques have proven to be espe...

Nondestructive Evaluation: Wood

Preservationists look to methods of nondestructive evaluation (NDE) to answer questions about the condition, strength, and construction details of wood in historic buildings in the interest of saving historic fabric and reducing or eliminating damage to significant historic features or materials caused by investigative probes. Many times, a basic wood inspection can answer questions posed when ...