PSI - Issue 13

Tatiana Oršulová et al. / Procedia Structural Integrity 13 (2018) 1689–1694 Tatiana Oršulová et al. / Structural Integrity Procedia 00 (2018) 000 – 000

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procedure of each sample. The results showed that significant dependence between applied plastic deformation and magnetic field response could be detected by the sensor. The main aim of this study was to show a detection ability of used the sensor to bring appropriate results about various level of mechanical deformation of the samples. The results showed that this information could be presented, although the plastic deformation levels lower than 5% could not be successfully detected. Further, the 3D scanning procedure brought new information about the magnetic behavior of the inspected specimens. This approach is quite new and may be helpful in better characterization and understanding of the austenitic stainless steels. As could be seen, the mechanical and electromagnetic properties of the same material vary together and it is a question of the appropriate sensing element to reveal their certain mutual dependences nondestructively. The second step of research was a confirmation of presence of plastic deformation in selected materials via device Magnet Physik. Mentioned measurement device was able to record only results for one material - the AISI 304. Despite the measurement failure of the AISI 316 grades it can be said, that the research goal was accomplished. A presence of different grades of plastic deformation in AISI 304 was confirmed. The future steps of the authors will lead to quantitative characterization of the partially ferromagnetic martensite components within the deformed austenitic stainless steel that may results in the so-called magnetic memory.

Acknowledgements

The research was supported by Scientific Grant Agency of Ministry of Education of Slovak republic VEGA 1/0683/15 and Visegrad Scholarship Programme.

References

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