Influence of microstructure on micromagnetic Barkhausen emissions in AISI 4140 steel

Author

Mitra, A. ; Govindaraju, M.R. ; Jiles, D.C.

Volume

31

Issue

6

fYear

1995

fDate

11/1/1995 12:00:00 AM

Firstpage

4053

Lastpage

4055

Abstract

The effects of microstructure on the micromagnetic Barkhausen signal emissions in AISI 4140 steel are reported. The Barkhausen signal amplitude is known to be highly sensitive to the type and distribution of microstructural inhomogeneities, such as grain boundaries, precipitates and dislocations. The Barkhausen measurements were taken on samples having pearlitic, spheroidized and bainitic microstructures. The Barkhausen emissions were measured in terms of rms voltage peak-to-peak voltage and number of events per cycle. It is shown that Barkhausen signals can be used to distinguish between pearlitic and bainitic microstructures

Keywords

Barkhausen effect; crystal microstructure; dislocation structure; ferromagnetic materials; grain boundaries; precipitation; steel; AISI 4140 steel; Barkhausen signal amplitude; bainitic microstructure; dislocations; grain boundaries; micromagnetic Barkhausen emissions; microstructure; pearlitic microstructure; precipitates; spheroidized microstructure; Coils; Grain boundaries; Heat treatment; Laboratories; Magnetic field measurement; Micromagnetics; Microstructure; Saturation magnetization; Steel; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.489859

Filename

489859