№76-23

Simulating the structure-property relationship in weld zones

U. Slupska¹, O. Beketov², N. Rott¹, D. Laukhin¹, O. Tverdokhlib¹, І. Verner¹

¹Dnipro University of Technology, Dnipro, Ukraine

²Prydniprovska State Academy of Civil Engineering and Architecture, Dnipro, Ukraine

Coll.res.pap.nat.min.univ. 2023, 75:273–282

Full text (PDF)

https://doi.org/10.33271/crpnmu/76.273

ABSTRACT

Purpose. This study investigates the relationship between the geometrical parameters of welded zones and the corresponding structural state formed in low-carbon low-alloy steels after electron beam welding.

Methods. A simulation model was developed and simulation experiments were conducted.

Results. The relationship between the geometrical parameters of welded zones and the corresponding structural state of low-carbon low-alloy steels 09G2S, 10KhSND, and 10G2FB after electron beam welding was analyzed using confirmatory factor analysis. Confirmatory factor analysis was performed by constructing a path diagram. The following variables were used to obtain the diagram: the percentage content of the structural components of ferrite and pearlite; geometric dimensions of the welded joint sections. Mathematical methods of covariance and correlation analysis were used to check the adequacy of the obtained model. The obtained data show that the indicators of the obtained criteria correspond to reliability.

Scientific novelty. The methodology of applying confirmatory factor analysis for the quantitative analysis of the relationship between the geometrical parameters of welded zones and the corresponding structural state was developed. The relationship between the geometric dimensions of the welded joint zones and the corresponding structural state formed in low-carbon, low-alloy steels after electron beam welding and the corresponding structural state was analyzed.

Practical significance. The confirmatory factor analysis was used to analyze the relationship between the geometrical parameters of welded zones and the corresponding structural state of low-carbon low-alloy steels 09Г2С, 10ХСНД, and  0Г2ФБ.

Keywords: confirmatory factor analysis, path diagram, covariance analysis, correlation analysis, maximum likelihood method, least squares method.

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