Wykorzystanie szumu Barkhausena jako metody pomiaru twardości materiału ferromagnetycznego
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Abstract
Tradycyjne metody pomiaru twardości nie umożliwiają wielokrotnych okresowych pomiarów w tym samym miejscu, ze względu na odkształcenia plastyczne powierzchni spowodowane przez wgłębnik twardościomierza. Potencjalną alternatywą jest wykorzystanie metod magnetycznych badań nieniszczących, do których zaliczany jest pomiar szumu Barkhausena, gdzie taka niedogodność nie występuje, a z przeprowadzonych badań eksperymentalnych wynika, że jest silnie powiązany z mikrostrukturą materiału ferroma-gnetycznego. Celem badań zaprezentowanych w artykule było opracowanie zależności diagnostycznych pomiędzy wielkościami charakterystycznymi szumu Barkhausena a twardością Vickersa HV5. Poszukiwano takich parametrów, dla których wartość współczynnika determinacji R2 korealcji liniowej z twardością HV5 osiągałaby wartość maksymal- ną. Badania wykonano na próbkach płytowych wykonanych ze stali S235 i DC01am.
Using Barkhausen noise as a ferromagnetic material hardness test method
Abstract
Traditional hardness measurement method dont allow for multiple and periodic measurement in the same spot, due plasticall deformation that occur during test. Potential alternative A potential alternative are magnetic non-destructive methods, such as the Barkhausen noise measurement, where this disadvantage is no present and experimental studies prove its strong dependence to microstructure. The aim of the study presented in this paper was to develop diagnostic relationships between characteristic parameters that desribes Barkhausen noise quantitatively and HV5 hardness. The quantities that describe the Barkhausen noise quantitatively for which the highest value of R2 of linear correlation with HV5 hardness was looking for. Tests were performed on plastically deformed samples maded of S235 and DC01am steel grade.
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