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Statistical Evaluation of Barkhausen Noise Testing (BNT) for Ground Samples
KTH, School of Industrial Engineering and Management (ITM), Production Engineering.ORCID iD: 0000-0003-3056-781X
Univ Oulu, Fac Technol, Control Engn Environm & Chem Engn, POB 4300, FI-90014 Oulu, Finland..ORCID iD: 0000-0002-9719-1418
Tampere Univ, Fac Engn & Nat Sci, POB 589, FI-33014 Tampere, Finland..ORCID iD: 0000-0002-0047-3268
Schlumpf Scandinavia AB, Flygfaltsgatan 2D, S-12830 Skarpnack, Sweden..
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2019 (English)In: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 19, no 21, article id 4716Article in journal (Refereed) Published
Abstract [en]

Barkhausen noise testing (BNT) is a nondestructive method for investigating many properties of ferromagnetic materials. The most common application is the monitoring of grinding burns caused by introducing locally high temperatures while grinding. Other features, such as microstructure, residual stress changes, hardening depth, and so forth, can be monitored as well. Nevertheless, because BNT is a method based on a complex magnetoelectric phenomenon, it is not yet standardized. Therefore, there is a need to study the traceability and stability of the measurement method. This study aimed to carry out a statistical analysis of ferromagnetic samples after grinding processes by the use of BNT. The first part of the experiment was to grind samples in different facilities (Sweden and Finland) with similar grinding parameters, different grinding wheels, and different hardness values. The second part was to evaluate measured BNT parameters to determine significant factors affecting BNT signal value. The measurement data from the samples were divided into two different batches according to where they were manufactured. Both grinding batches contained measurement data from three different participants. The main feature for calculation was the root-mean-square (RMS) value. The first processing step was to normalize the RMS values for all the measurements. A standard analysis of variance (ANOVA) was applied for the normalized dataset. The ANOVA showed that the grinding parameters had a significant impact on the BNT signal value, while the other investigated factors (e.g., participant) were negligible. The reasons for this are discussed at the end of the paper.

Place, publisher, year, edition, pages
MDPI , 2019. Vol. 19, no 21, article id 4716
Keywords [en]
Barkhausen noise testing (BNT), uncertainty, proficiency test, ANOVA
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-265468DOI: 10.3390/s19214716ISI: 000498834000113PubMedID: 31671620Scopus ID: 2-s2.0-85074321480OAI: oai:DiVA.org:kth-265468DiVA, id: diva2:1380013
Note

QC 20191218

Available from: 2019-12-18 Created: 2019-12-18 Last updated: 2019-12-18Bibliographically approved

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Tomkowski, RobertSorsa, AkiSanta-aho, SuviVippola, Minnamari
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