期刊
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
卷 28, 期 11, 页码 7036-7046出版社
SPRINGER
DOI: 10.1007/s11665-019-04421-4
关键词
austenitic stainless steel; EPR; strain; stress-induced martensite
Electrochemical response of Type 304 stainless steel, with different levels of plastic deformation, was investigated in solutions containing different amounts of H2SO4 and KSCN at room temperature. Potentiodynamic polarization and double-loop electrochemical potentiokinetic reactivation (DL-EPR) techniques were used to characterize different levels of plastic deformation. The results have indicated that DL-EPR values and passivation current density increased with increase in plastic deformation. The DL-EPR values were correlated well with hardness and fraction of strain-induced martensite. Attack during DL-EPR tests occurred on strain regions within the matrix such as dislocations in austenite and martensite and/or interface between austenite and martensite. No well-defined correlation was observed between the levels of plastic deformation and potentiodynamic polarization behavior.
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