Abstract

A study of Barkhausen jumps (BJ) is carried out on samples of low carbon steel of different heat treatments. The formation of cementite lamellas, beside the dislocation density, may have an important role in controlling BJ. Spheroidization of the lamellas would decrease the number of jumps as well as the mean potential difference (UB) of jumps. The relative amount of produced eddy current depends on the microstructure of the sample. Spheroidization of the lamellas would increase the amount of produced eddy current. Barkhausensprunge (BJ) werden an Proben von kohlenstoffarmem Stahl nach verschiedenen Warmebehandlungen durchgefuhrt. Die Bildung von Zementitlamellen kann neben der Versetzungsdichte eine wesentliche Rolle bei der Steuerung der BJ spielen. Die Spharoidizierung der Lamellen erniedrigt sowohl die Zahl der Sprunge als auch die mittlere Potentialdifferenz (UB) der Sprunge. Die relative Grose des produzierten Wirbelstromes hangt von der Mikrostruktur der Probe ab. Die Spharoidisierung der Lamellen erhoht den produzierten Wirbelstrom.

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