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Comparison of X-Ray Computed Tomography and Metallography for Determination of Pore Size

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Metallurgist Aims and scope

The pores that occur during the casting process adversely affect the fatigue characteristics of the Al–Si alloys (silumins). The effect of casting pores under fatigue is associated with a number of factors, such as pore size, morphology, and position inside the cast part. Metallography can be used for the statistical characterization of pores. However, random two-dimensional sections through the pores fail to provide a reliable estimation of defect size without additional data analysis. This paper presents two experimental methods, namely X-ray computed tomography and metallography, which are used to characterize the size and morphology of the pores in the AlSi7Mg alloy casting. Three-dimensional data obtained by X-ray computed tomography were used to evaluate the criteria for determining the pore size based on metallographic measurements. The stress concentration resulting from the actual 3D morphology of pores was further investigated by the finite element method and compared with simplified 2D models of pores.

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  1. Tashkent State Transport University, Tashkent, Republic of Uzbekistan

    R. V. Rahimov, B. A. Abdullaev, B. Sh. Zhumabekov, V. V. Ergasheva & M. K. Ruzmetov

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  1. R. V. Rahimov
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  2. B. A. Abdullaev
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  3. B. Sh. Zhumabekov
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  4. V. V. Ergasheva
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Correspondence to R. V. Rahimov.

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Translated from Metallurg, Vol. 67, No. 6, pp. 94–100, June, 2023.

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Rahimov, R.V., Abdullaev, B.A., Zhumabekov, B.S. et al. Comparison of X-Ray Computed Tomography and Metallography for Determination of Pore Size. Metallurgist 67, 839–848 (2023). https://doi.org/10.1007/s11015-023-01572-7

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