Multiparameter methods in magnetic structuroscopy and nondestructive testing of mechanical properties of steels

Prediction of the Mechanical Properties of P91 Steel by Means of Magneto-acoustic Emission and Acoustic Birefringence

“…Barkhausen noise maximum intensity occur for values of magnetic field close to the coercive field, but the magnetoacoustic emission maxima are observed for the "knee" regions of the hysteresis loops where the creation/annihilation of 90 • domain walls take place [34]. So, it can be concluded, that the strength of relationships between parameters coming from non-destructive and destructive tests may be associated with a range of magnetic field intensity, and therefore, with diversity of physical phenomena occurring during the magnetization cycle.…”

Multiparameter methods in magnetic structuroscopy and instruments for their realization (review): I. Multiparameter magnetic structuroscopy by using parameters of a hysteresis loop measured with a closed electromagnet-article magnetic circuit

“…In [30][31][32], it was suggested to use the same two parameters for testing the porosity (P) and the amount of "fixed" carbon (C) in powder steels that were manufactured by sintering of compacts that were prepared from a mixture of powdered starting components and subsequently subjected to heat treatments, namely, hardening and tempering. In this case, the optimum correlation equations were obtained for the porosity (at the correlation coefficient R = 0.975 and the root mean square deviation S n = 0.305%)…”