Artigo
2019
Microstructure and surface oxidation behavior of an austenitic Fe-Mn-Si-Cr-Ni-Co shape memory stainless steel at 800 °C in air
Autores
Silva, R.
Arana, C.
de Sousa Malafaia, A. M.
Mendes Filho, A. A.
Pascal, C.
Sordi, V. L.
Rovere, C. A.D.
Corrosion Science , vol. 158 , Article 108103
ISSN: 0010938X
30
Citações
8
Autores
Resumo
© 2019 Elsevier LtdIn the present research, the microstructure and oxidation behavior of an Fe-8.26Mn-5.25Si-12.80Cr-5.81Ni-11.84Co shape memory stainless steel (SMSS) was studied at 800 °C in air for up to 120 h. Phase changes and oxidation mechanism were discussed based on microscopy analyses, thermogravimetric measurements and thermodynamic simulations. The results show that oxidation exposure promotes the formation of the σ, χ and ferrite phases in the metallic substrate. The oxidation behavior follows a parabolic law, with the kinetics of oxidation being controlled by the Mn2O3 oxide growth in the first hours, and by Mn3O4 and MnCr2O4 spinel growth after 24 h of exposure.
Palavras-chave
High temperature oxidation
Microstructure
SEM
Stainless steel
TEM
Thermodynamic simulations
Chemistry (all)
(CHEM)
Chemical Engineering (all)
(CENG)
Materials Science (all)
(MATE)
: Scopus
Última atualização: 2026-06-25
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2-s2.0-85070623383PII: S0010938X19303816