Impulse Excitation Internal Friction Study of Retained Austenite in Ferrous Martensite
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Internal friction (IF) measurements were conducted using ferrous lath martensite specimens with different retained austenite fractions. While a distinctive Snoek-Kê-Köster (SKK) peak was detected in the IF spectra, the peak shape did not conform to the peak shape observed for fully martensitic steel. Peak analysis suggests that the peak shape is related to the overlap of the SKK peak with a Finkelstein–Rosin peak, additional Debye-type peak related to the retained austenite.
The authors gratefully acknowledge the support of the POSCO Technical Research Laboratories (South Korea).
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