Determining the influence of technological parameters of the electron-beam surfacing process on quality indicators

Authors

DOI:

https://doi.org/10.15587/1729-4061.2022.253473

Keywords:

electron beam surfacing, Ti6Al4V, technological parameters, raster microscopy, surface roughness

Abstract

This paper reports the technology and equipment designed for manufacturing parts and components with predefined properties by 3D printing methods. Underlying the technology is the use of a beam of high-power electrons to smelt metal powder in a vacuum chamber with the formation of successive layers that repeat the contours of the digital model of the article.

The object of research is the process of surfacing articles from the Ti6Al4Vtitanium alloy powder. The purpose is to determine the optimal surfacing modes based on identifying the effect of process parameters on the quality indicators of articles.

The result of the study is the analyzed influence of technological parameters on the properties of articles. The optimum energy density of the beam of 44.5 J/mm3has been determined. Based on the research results, 25 experimental samples were printed. Three beam speed modes were used: 270, 540, and 780 mm/s. For each mode, the dynamic focusing current varied from −1.2 to 1.27 A in increments of about 0.3 A.

The articles were carefully examined. A method of raster electron microscopy was used to study the morphology of the samples' surfaces in several zones, namely in the central zone and along the contour; the roughness parameters of the surface micro relief, as well as the presence of defects (pores, non-melting, micro irregularities, inclusions), were established. It has been found that the articles are characterized mainly by a homogeneous micro relief of the profile. The structure of surfaces, formed in different zones depending on technological modes, differs in its morphology. Surfacing modes have been established that have the practical application: beam speed, 780 mm/s; power, 675 W; dynamic focus current, from –1.2 to 0 A. This provides for the minimal parameters of the surface micro relief and the absence of defects such as shrinkage pores, non-melting, as well as a minimum number of inclusions.

Supporting Agency

  • Фінансування роботи здійснювалось у рамках цільової програми наукових досліджень НАНУ за темою «Розробка адитивних електронно-променевих технологій виготовлення і ремонту виробів авіакосмічної промисловості і турбінобудування» (номер державної реєстрації 0117U001264). Також автори вдячні ТОВ «Вітова ЛТД» за фінансову підтримку в проведені досліджень.

Author Biographies

Vladyslav Matviichuk, E.O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine

Researcher

Department of Physical Processes, Technology and Equipment for Electron Beam and Laser Welding

Vladimir Nesterenkov, E.O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine

Doctor of Technical Sciences, Senior Researcher, Head of Department, Corresponding Member of the National Academy of Sciences of Ukraine

Department of Physical Processes, Technology and Equipment for Electron Beam and Laser Welding

Olena Berdnikova, E.O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine

Doctor of Technical Sciences, Leading Researcher

Department of Physical-Chemical Studies of Materials

References

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Published

2022-02-27

How to Cite

Matviichuk, V., Nesterenkov, V., & Berdnikova, O. (2022). Determining the influence of technological parameters of the electron-beam surfacing process on quality indicators. Eastern-European Journal of Enterprise Technologies, 1(12(115), 21–30. https://doi.org/10.15587/1729-4061.2022.253473

Issue

Vol. 1 No. 12(115) (2022): Materials Science

Section

Materials Science

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Copyright (c) 2022 Vladyslav Matviichuk, Vladimir Nesterenkov, Olena Berdnikova

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