Effect of grain size on the oxidation of Fe–13Cr–5Ni alloy at 973K in Ar–21vol%O2

Autor:	Chi Zhang, Toshio Maruyama, Kenichi Kawamura, Lu Liu, Zhi-gang Yang, Mitsutoshi Ueda
Rok vydání:	2015
Předmět:	Microstructural evolution Materials science Kinetic model General Chemical Engineering Alloy Metallurgy Thermodynamics General Chemistry engineering.material Intergranular corrosion Grain size Corrosion engineering General Materials Science Steady state (chemistry) Oxidation resistance
Zdroj:	Corrosion Science. 91:195-202
ISSN:	0010-938X
DOI:	10.1016/j.corsci.2014.11.020
Popis:	Effect of grain refinement from 370 to 34 μm on oxidation of transition Fe–13Cr–5Ni alloy at 973 K in Ar–21 vol%O2 was investigated. The measured weight gains were fitted taking into account a mixed kinetic model with an initial linear and subsequent parabolic growth behaviour. Different scale microstructural evolution was discussed. Contribution of grain refinement to the oxidation is predominantly due to its effect on the inward oxidation process. Decreasing grain size promoted intergranular oxidation, accelerated formation of the Cr-containing inner scale, contributed to the faster transition to the steady state oxidation and correspondingly slightly improved the oxidation resistance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34d8b988880ab12f8a42d4e382db2c5f https://doi.org/10.1016/j.corsci.2014.11.020 Zobrazit plný text záznamu Full Text from ScienceDirect