Assessment of inclusion analysis via manual and automated SEM and total oxygen content of steel

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Abstract

The search for increasingly cleaner steels has heightened the demand for additional analysis techniques, especially for the evaluation of inclusions in steel where greater cleanliness is required. A range of factors should be taken into account when selecting a particular method, in accordance with analysis objectives and in order to maximize the reliability of results. Although statistical techniques make it possible to correlate data from smaller samples with entire heats of steel, some methods are more suited to evaluating different inclusion profiles. The objective of this study was to evaluate the main characteristics of certain techniques used to study inclusions. Two of the primary methods for direct inclusion analysis of solid steel are metallographic techniques and chemical analysis, with total oxygen content used as an indirect inclusion measurement. A search of the literature identified the main advantages and disadvantages of each method, as well as the primary limitations for their use. This makes it easier to determine the most suitable methods for carrying out the desired analysis.

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Bartosiaki, B. G., Pereira, J. A. M., Bielefeldt, W. V., & Vilela, A. C. F. (2015). Assessment of inclusion analysis via manual and automated SEM and total oxygen content of steel. Journal of Materials Research and Technology, 4(3), 235–240. https://doi.org/10.1016/j.jmrt.2015.01.008

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