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Abstract

In this paper, the microstructure of laser beam welded Sc-modified AA2519-F has been taken under investigation. The welded joint has been produced using Fanuc 710i industrial robot equipped with YLS-6000 6 kW laser beam source. The welding speed and laser power were equal to 0.75 m/min and 3.2 kW, respectively. The investigation involved microstructure observations with the use of both light microscope and scanning electron microscope with energy dispersive spectroscopy (EDS) analysis of chemical composition and microhardness distribution measurements. It has been stated that laser beam welding allows to obtain Sc-modified AA2519-F weld of good quality, characterized by the presence of an equiaxed grain zone containing scandium-rich precipitates adjacent to the fusion boundary.
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Authors and Affiliations

R. Kosturek
1
ORCID: ORCID
L. Śnieżek
1
ORCID: ORCID
K. Grzelak
1
ORCID: ORCID
M. Wachowski
1
ORCID: ORCID

  1. Military University of Technology, Faculty of Mechanical Engineering, 2 gen. S. Kaliskiego Str., 00-908 Warszawa, Poland
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Abstract

The paper presents the possibility of fabricating ceramic-metal composites by an innovative method of centrifugal slip casting in the magnetic field. It was examined whether the use of this method would allow obtaining a gradient concentration of metal particles in the ceramic matrix. In the applied technique, the horizontal rotation axis was used. The study investigated the effect of solid phase content on the properties and microstructure of the products. Water-based suspensions with 35, 40, 45 and 50 vol.% of solid-phase content were prepared with 10 vol.% additional of nickel powder. The viscosity of prepared slurries was considered. The gradient distribution of nickel particles in the zirconia matrix was observed on SEM. Vickers hardness of ZrO2-Ni composites has been measured. The research revealed that the physical properties depend on the volume fraction of solid content and increase as the volume of solid content increases.

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Authors and Affiliations

M. Wachowski
ORCID: ORCID
R. Kosturek
ORCID: ORCID
H. Winkler
A. Miazga
P. Lada
W. Kaszuwara
K. Konopka
J. Zygmuntowicz

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