Detection of Coarse Grains by Nondestructive Magnetic Methods

  • S. Segalini
  • C. Dunand
  • M. Putignani
  • S. Genet


Superficial coarse grains (100 μm – 300 μm) (figure 1) appear with a significant frequency on hot rolled low carbon aluminum killed steel coiled at high temperature1. On forming, these coarse grains will give rise to the so called defect “orange peel defect”.


False Alarm Magnetic Anisotropy Convex Side Measuring Head Destructive Testing 
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  1. 1.
    Y. Tokunaga et al, Occurence of coarse grains in hot rolled low carbon aluminum killed steel coiled at high temperature, Testu to Hagane, 1984, 70, 15, pp. 2136–2143.Google Scholar
  2. 2.
    S. Tiitto, On the influence of microstructure on magnetization transitions in steel, Acta Polytechnica Scandinavica, Applied Physics series 119 — Helsinki, 1977.Google Scholar
  3. 3.
    R. L. Pasley, Barkhausen effect, an indication of stress, Materials Evaluation (July 1970) pp. 157–161.Google Scholar
  4. 4.
    S. Segalini, M. Mayos, M. Putignani, Utilisation des méthodes électromagnétiques pour le contrôle de la microstructure des aciers, Revue Métallurgie, 10 (Octobre 1985), pp. 569–575.Google Scholar

Copyright information

© Plenum Press, New York 1987

Authors and Affiliations

  • S. Segalini
  • C. Dunand
  • M. Putignani
    • 1
  • S. Genet
    • 2
  1. 1.IRSIDSaint-German-en layeFrance
  2. 2.Service métallurgie qualitéUSINOR DUNKERQUEDunkerqueFrance

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