Temperature Dependence of Barkhausen Noise Parameters in Carbon Steel
Temperature dependence of different parameters (the position of the inflexion point and the saturation value on the root main square, RMS, values versus exciting field curves) of the Barkhausen noise is measured in structural steel (S 235 JRG1). It is shown that while the position of the inflexion p...
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Veröffentlicht in: | Materials science forum 2007-01, Vol.537-538, p.371-380 |
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Sprache: | eng |
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Zusammenfassung: | Temperature dependence of different parameters (the position of the inflexion
point and the saturation value on the root main square, RMS, values versus exciting field
curves) of the Barkhausen noise is measured in structural steel (S 235 JRG1). It is shown that
while the position of the inflexion point remained constant, the RMS value at the inflexion
point and saturation value increased with the increasing temperature, T. Most interestingly the
field required for saturation decreased with decreasing temperature and had a breakpoint at
about 200K. Breakpoints at the same temperature on the critical exponents versus temperature
functions (i.e. on the β(T) and α(T) curves, where β and α are the exponents of the probability
distributions of peak heights and durations, respectively) were also observed. This
temperature can be identified as the ductile-brittle transition temperature. |
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ISSN: | 0255-5476 1662-9752 1662-9752 |
DOI: | 10.4028/www.scientific.net/MSF.537-538.371 |