Effect of a grain-refined microalloyed steel substrate on the formation mechanism of a tight oxide scale
Source abstract
Abstract
Abstract The formation mechanism of tight oxide scale on the microalloyed steel was investigated at temperatures of 550–850 °C in dry air. Microstructural characterisations reveal that the spallation of oxide scale dominates at the centre of coarse grains on the oxidation initiation. The fine-grained steel improves the adhesive properties of oxide scale by enhanced grain-boundary diffusion. The lower activation energy and higher oxidation rate accelerate cation/anion migration along grain boundaries, leading to high magnetite content in the oxide scale. The approach by grain refinement at initial oxidation has been proposed to generate the pickle-free tight oxide scale.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · Metallurgical Processes and Thermodynamics · Advanced ceramic materials synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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