caa a22 4500 477080618 CHVBK 20180405111448.0 cr unu---uuuuu 170330e19960601xx s 000 0 eng 10.1007/BF00729134 doi (NATIONALLICENCE)springer-10.1007/BF00729134 Altpeter I. Fraunhofer-Institute for Nondestructive Testing (IZFP), University, Bldg. 37, 66123, Saarbrücken, Germany aut Nondestructive evaluation of cementite content in steel and white cast iron using inductive Barkhausen noise [Elektronische Daten] [I. Altpeter] A nondestructive testing method for the determination of the cementite content in iron-carbon steel and white cast iron is presented. The method is based on micromagnetic measuring parameters derived from inductive Barkhausen noise measurements taken under room temperature and with temperatures above the Curie temperature. The influence of different cementite contents and cementite modifications on the micromagnetic measuring quantities for steels with ferritic, pearlitic, martensitic annealed and martensitic soft annealed microstructure states and for white cast iron was determined. Cementite actively produces its own inductive Barkhausen noise and also influences the Barkhausen noise of the iron matrix both as a foreign body and by its stress fields of the second kind. Each influence has a different effect on steel and on white cast iron. It was shown that parameters derived from the Barkhausen noise can be used for determining the cementite content if the microstructure state is known. Moreover, when the steel grade is known, the microstructure state can be detected from the pattern of the Barkhausen noise curve by means of simple pattern recognition. Plenum Publishing Corporation, 1996 Cementite nationallicence white cast iron nationallicence ferritic-pearlitic steel nationallicence inductive Barkhausen noise nationallicence Curie temperature nationallicence Journal of Nondestructive Evaluation Kluwer Academic Publishers-Plenum Publishers 15/2(1996-06-01), 45-60 0195-9298 15:2<45 1996 15 10921 https://doi.org/10.1007/BF00729134 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00729134 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Altpeter I. Fraunhofer-Institute for Nondestructive Testing (IZFP), University, Bldg. 37, 66123, Saarbrücken, Germany aut NATIONALLICENCE 773 0- Journal of Nondestructive Evaluation Kluwer Academic Publishers-Plenum Publishers 15/2(1996-06-01), 45-60 0195-9298 15:2<45 1996 15 10921 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer