Validation of models for Laser Ultrasonic spectra as a function of the grain size in steel
Paper in proceeding, 2018
Mathematical modelling of the ultrasonic wave propagation problem has been used in order to get a deeper understanding of the physics and to identify ultrasonic properties that can be used as an indirect measurement of grain size. The use of both analytical and numerical models enabled extensive parametric studies together with investigation of ultrasonic interactions with well-defined individual microstructures.
The LUS technique has previously been applied to e.g. monitor grain growth during thermomechanical processing of metals. These applications identified and used a correlation with the frequency content of the attenuation. This have been investigated as a possible indirect measurement of grain size, also in this project. The models have been used to verify the correlations and to evaluate different procedures that could be applied as an industrial solution. The suggested procedure is based on deconvolving two successive echoes and has been experimentally validated by two different LUS systems. The reference samples used in the validation were produced by changing the annealing temperature and time to obtain a variation in grain sizes. These grain sizes were then identified by EBSD and the samples were examined in terms of grain size influence on spectral attenuation
Author
Håkan Wirdelius
Chalmers, Industrial and Materials Science, Engineering Materials
Mikael Malmström
Swerea
A. Duijster
Netherlands Organisation for Applied Scientific Research (TNO)
A. Volker
Netherlands Organisation for Applied Scientific Research (TNO)
David Krix
Salzgitter Mannesmann Forschung
Martin Stolzenberg
Salzgitter Mannesmann Forschung
A. Martinez-De-Guerenu
CEIT - Centre of Studies and Technical Research
Isabel GUTIERREZ
CEIT - Centre of Studies and Technical Research
D. Jorge-Badiola
CEIT - Centre of Studies and Technical Research
F. D. Van Den Berg
Tata Steel, Netherlands
Piet Kok
Tata Steel, Netherlands
12th European Conference on Non-Destructive Testing (ECNDT 2018)
22858
978-91-639-6217-2 (ISBN)
Göteborg, Sweden,
Product Uniformity Control (PUC)
European Commission (EC) (NoRFSR-CT-2013-00031PUC), 2013-07-01 -- 2017-12-31.
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Production Engineering, Human Work Science and Ergonomics
Other Engineering and Technologies not elsewhere specified
Other Materials Engineering
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