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Improving Selectivity on High-Temperature Decarburization Depth Measurements using an Image Segmentation Method

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Abstract

Optical decarburization measurements are preferred for quality tests, modeling, or indirect methods over carbon steel products. The measurements are commonly done by metallographs and can be supported by image processing. Image processing allows the collection of multiple measurements from digital micrographs. Nevertheless, limited attention has been paid to observing the influence of the segmentation methods on the precision of the depth measurements. The present paper uses type 1045 steel micrographs to examine the impact of the segmentation method parameters on the precision of depth measurements obtained with image processing. The micrographs are processed by a median filter and statistical region merging process. Then, a script is utilized to obtain 2,560 measurements per micrograph. The data is used to depict visual results of the decarburized zones and detailed statistical analysis. Eventually, image processing and manual measurements are compared to denote the reproducibility of the method. The paper concludes that the segmentation parameter can be used to measure complete or total decarburized zones for further analysis.

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Acknowledgements

The authors would like to thank to the National Laboratory “SEDEAM” for supporting this research through the equipment available in the solid-gas laboratory. This research is also supported by the “Tecnológico Nacional de México” TecNM-ITM through the founding 5441.19-P.

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Authors and Affiliations

  1. Departamento de Electrónica, TecNm - Instituto Tecnológico de Morelia, Av. Tecnológico 1500, Morelia, 58120, Michoacán, México

    Gerardo Marx Chávez-Campos, Enrique Reyes-Archundia & José A. Gutiérrez-Gnecchi

  2. Departamento de Metalurgia, TecNM - Instituto Tecnológico de Morelia, Av. Tecnológico 1500, Morelia, 58120, Michoacán, México

    Héctor J. Vergara-Hernández, Octavio Vázquez-Gómez & Oscar D. Prieto-Sánchez

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  1. Gerardo Marx Chávez-Campos
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  2. Enrique Reyes-Archundia
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  3. Héctor J. Vergara-Hernández
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Correspondence to Gerardo Marx Chávez-Campos.

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Chávez-Campos, G.M., Reyes-Archundia, E., Vergara-Hernández, H.J. et al. Improving Selectivity on High-Temperature Decarburization Depth Measurements using an Image Segmentation Method. Oxid Met 98, 121–134 (2022). https://doi.org/10.1007/s11085-022-10113-7

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  • DOI: https://doi.org/10.1007/s11085-022-10113-7

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