Role of cerium addition in enhancing the oxidation resistance of austenitic Fe-Mn-Si-Cr-Ni shape memory stainless steels at 800 °C: Microstructure and oxidation mechanism
Source abstract
Abstract
International audience ; Austenitic Fe-13.50Mn-3.98Si-9.54Cr-4.51Ni shape memory alloyed with (0.18, 0.42 and 0.96 wt%) Ce was exposed in air at 800 • C. Both 0.18 and 0.42 wt% Cerium additions yielded protective kinetics, while the 0.96 wt % Ce content did not change the oxidation resistance. Increased oxidation resistance was related to the growth of a fine-grained oxide layer, slightly wrinkled with a higher Cr content. Cerium also acted as a S scavenger, suppressing its interfacial segregation. In the Ce-free alloy, fast oxide growth occurred in regions where S segregated at the interface, leading to severe wrinkling of the layer, resulting in lower oxidation resistance.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · Metallurgical Processes and Thermodynamics · Hydrogen embrittlement and corrosion behaviors in metals
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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