Barkhausen Noise Emission in Hard-Milled Surfaces

This paper reports on an investigation treating a hard-milled surface as a surface undergoing severe plastic deformation at elevated temperatures. This surface exhibits remarkable magnetic anisotropy (expressed in term of Barkhausen noise). This paper also shows that Barkhausen noise emission in a h...

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Bibliographic Details
Published in:Materials 2019-02, Vol.12 (4), p.660
Main Authors: Neslušan, Miroslav, Mičietová, Anna, Hadzima, Branislav, Mičieta, Branislav, Kejzlar, Pavel, Čapek, Jiří, Uríček, Juraj, Pastorek, Filip
Format: Article
Language:English
Subjects:
Anisotropy
Barkhausen effect
Carbides
Comminution
Compressive properties
Cutting speed
Deformation mechanisms
Dislocation density
Domain walls
Domains
Emission analysis
Feed direction
Ferromagnetic phases
Ferromagnetism
Grinding mills
Heat
Heat affected zone
Heat treatment
High temperature
Inserts
Lasers
Magnetic anisotropy
Magnetic fields
Morphology
Noise
Plastic deformation
Process controls
Retained austenite
Scanning electron microscopy
Steel
Stress state
Stresses
Tool wear
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Summary:This paper reports on an investigation treating a hard-milled surface as a surface undergoing severe plastic deformation at elevated temperatures. This surface exhibits remarkable magnetic anisotropy (expressed in term of Barkhausen noise). This paper also shows that Barkhausen noise emission in a hard-milled surface is a function of tool wear and the corresponding microstructure transformations initiated in the tool/machined surface interface. The paper discusses the specific character of Barkhausen noise bursts and the unusually high magnitude of Barkhausen noise pulses, especially at a low degree of tool wear. The main causes can be seen in specific structures and the corresponding domain configurations formed during rapid cooling following surface heating. Domains are not randomly but preferentially oriented in the direction of the cutting speed. Barkhausen noise signals (measured in two perpendicular directions such as cutting speed and feed direction) indicate that the mechanism of Bloch wall motion during cyclic magnetization in hard-milled surfaces differs from surfaces produced by grinding cycles or the raw surface after heat treatment.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma12040660