Abstract
Strain-induced martensite in 18/8 austenitic stainless steel was studied. Magnetic measurements and Mossbauer spectroscopic investigations were performed to characterize the amount of α’-martensite due to room-temperature plastic tensile loading. The effects of cold work and annealing heat treatment were explored using magnetic Barkhausen noise, saturation polarization, coercive force, hardness, and conversion electron Mossbauer spectra measurements. The results of the magnetic measurements were compared to results obtained by Mossbauer spectroscopy. The suggested Barkhausen noise measurement technique proved to be a useful quantitative and nondestructive method for determining the ferromagnetic phase ratio of the studied alloy.
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