| Title |
Effect of Mn, Si, and Sb on High-temperature Oxidation of Fe-Mn-Al-Si-Sb-C Steels |
| Authors |
박순용(Soon Yong Park); 이동복(Dong Bok Lee) |
| DOI |
https://doi.org/10.3365/KJMM.2017.55.5.308 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
metals; casting; oxidation; scanning electron microscopy (SEM); high Mn TWIP steel |
| Abstract |
High Mn twinning-induced plasticity (TWIP) steels with compositions of Fe-(18.0-18.17) Mn-1.51Al-(0.48-0.52)Si-(0.61-0.62)C-(0.52-0.54)Cr-(0.22-0.23)Ni-0.03Nb-(0-0.04)Sb (wt%) are oxidized at 650 ℃ and 750 ℃ for < 24 h in air in order to determine the effect of the alloying elements on the oxidation. They are oxidized parabolically to MnO2,Mn2O3,FeO,Fe2O3, and FeMn2O4 oxides with relatively fast rates. The formed scales are prone to spallation and bi-layered. The outer scales that are formed by the outward diffusion of cations are rich in Fe and Mn, while the inner scales that are formed by the inward diffusion of oxygen are rich in Fe, Mn, Al, Cr, and Si. The isothermal and cyclic oxidation resistance progressively increases with increments in the amount of Mn, Si, and Sb. †(Received September 26, 2016; Accepted November 18, 2016) |