Automatic Welding, 2025, №05

2025 №05 (02)

DOI of Article 10.37434/as2025.05.03

2025 №05 (04)

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"Avtomatychne Zvaryuvannya" (Automatic Welding), #5, 2024, pp. 25-30

Use of the hough transformation method for the metallographic studies of ferritic-bainitic steels microstructure

V.V. Holovko¹, O.O. Shtofel^1,2, D.Yu. Korolenko¹

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: v_golovko@ukr.net
²National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute». 37 Beresteysky Ave., 03056, Kyiv, Ukraine. E-mail: o.shtof@gmail.com

High-strength low-alloy steels are a promising material for the manufacture of welded metal structures, but their widespread use is hampered by their increased sensitivity to defects that arise during the welding process. Therefore, a fundamental aspect of developing the technology for welding these steels is understanding how the properties of the metal change during the welding process and identifying the main microstructural characteristics that explain these changes. Research on high-strength ferritic- bainitic steels, which concerns the microstructural characteristics and mechanical properties, is aimed at determining the total angle of structural grains disorientation, using the electron backscatter diffraction (EBSD) method, which can be implemented on electron microscopes, and requires special software installation. The metallographic analysis method using the Hough transformation, which can be implemented on optical microscopes and does not require special software, should be considered as an alternative to the EBSD method. 24 Ref., 5 Fig.
Keywords: high-strength low-alloy steel, welding, microstructure, metallographic analysis, grain boundaries, structural grains disorientation, Hough transformation


Received: 21.02.2025
Received in revised form: 16.07.2025
Accepted: 12.09.2025

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