Non-destructive testing (NDT)
Testing of materials is important, primarily in a field of increasing quality and reliability of products. NDT finds application especially in the machine industry. Non-destructive methods occupy a special position because they ensure that the material and its mechanical properties are not damaged. The existing non-destructive methods are based on the principle of detection of changes caused by inhomogeneities inside the material (fissures, ruptures, shrinkage cavities, holes, inclusions, etc), either in magnetic fields, eddy currents, optical changes or, last but not least, acoustic waves.
KeywordsAcoustic Emission Ultrasonic Wave Acoustic Emission Signal Ultrasonic Pulse Ultrasonic Method
Unable to display preview. Download preview PDF.
- 5.1MetherellA.F.et al: Acoustical Holography, Plenum, New York Vol. 1: 1969, Vol. 2: 1970, Vol. 3: 1971Google Scholar
- 5.2ObrazJ.: Ultrazvuková holografie a její použití, Jemná mechanika a optika, 16, 1973, No. 4, 94–96 (in Czech)1Google Scholar
- 5.3DunenganH.L.TetelmannA.S.: Acoustic emission, Research Development, 22, 1981, No. 5, 20–24Google Scholar
- 5.4FittingD.W., AdlerL.: Ultrasonic Spectral Analyses for Non-Destructive Evaluation, Plenum, New York, 1981Google Scholar
- 5.5FiguraZ.et al: Tlmiace teleso ultrazvukovej impulznej sondy, ČSSR Author’s Certificate No. 265541, from 10.2.1989 (in Slovak)2Google Scholar