High-temperature oxidation behavior of modified 4Al alumina-forming austenitic steel: Effect of cold rolling

The oxidation behavior and mechanism of as-received and 30 % cold-rolled alumina-forming austenitic (AFA) steel were investigated in dry air at 700 °C. The results show that the mass gain per unit area curves of as-received and 30 % cold-rolled steels subject to near-parabolic law before 100 h oxida...

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Bibliographic Details
Published inJournal of materials science & technology Vol. 68; pp. 91 - 102
Main Authors Gao, Qiuzhi, Liu, Ziyun, Li, Huijun, Zhang, Hailian, Jiang, Chenchen, Hao, Aimin, Qu, Fu, Lin, Xiaoping
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 30.03.2021
Subjects
Alumina-forming austenitic steel
Cold rolling
High-temperature oxidation
Oxidation mechanism
High-temperature oxidation
Cold rolling
Alumina-forming austenitic steel
Oxidation mechanism
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ISSN1005-0302
1941-1162
DOI10.1016/j.jmst.2020.08.013

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Summary:The oxidation behavior and mechanism of as-received and 30 % cold-rolled alumina-forming austenitic (AFA) steel were investigated in dry air at 700 °C. The results show that the mass gain per unit area curves of as-received and 30 % cold-rolled steels subject to near-parabolic law before 100 h oxidation time. Two samples both show higher high-temperature oxidation resistance due to the formation of dense Al2O3 oxide scale. Gradual spallation of outer scale results in the formation of continuous and dense alumina scale. Dislocations can act as short-circuit diffusion channel for the diffusion of Al from alloy matrix to surface, and also provide nucleation sites for B2-NiAl phase, which ensure the continuous formation of Al2O3 scale.
ISSN:1005-0302
1941-1162
DOI:10.1016/j.jmst.2020.08.013