Determination of Microstructural Parameters by Magnetic and Ultrasonic Quantitative NDE

  • Werner A. Theiner
  • Herbert H. Willems


Microstructure parameters like precipitations, grain boundaries, dislocations, grain size and atomic defects (impurities, vacancies) determine the mechanical properties of technical steels in well-known manner1 and, therefore, the estimation of these parameters is a general aim in the field of quality and production control as well as in the development of new steels. Nondestructive (nd) techniques, which are sensitive to “lattice imperfections” and macro-stresses, should cover the range from atomic up to macroscopic dimensions in the centimeter range. This problem can be solved by a combination of different and independent nd quantities as listed in Table 1 for ultrasonic and electromagnetic methods.


Attenuation Coefficient Microstructural Parameter Ultrasonic Attenuation Bloch Wall Lattice Imperfection 
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Copyright information

© Plenum Press, New York 1984

Authors and Affiliations

  • Werner A. Theiner
    • 1
  • Herbert H. Willems
    • 1
  1. 1.Fraunhofer-Institut für zerstörungsfreie PrüfverhafrenSaarbrückenGermany

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