CONTROL OF THE STRUCTURAL-PHASE COMPOSITION OF TITANIUM MATRIX
COMPOSITES DURING DIRECT LASER DEPOSITION
I. S. Gertsel1,2, A. A. Golyshev1,2
1Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
2Novosibirsk State University, Novosibirsk, Russia
Keywords: VT6 alloy, boron carbide, Substrate preheating, microhardness, synchrotron radiation
Abstract
The possibility of controlling the structural-phase composition of a VT6–
B4C titanium matrix composite during direct laser deposition was investigated. A
correlation was established between the laser processing parameters and the
resulting microstructure: changes in energy input led to changes in the
concentration of secondary phases (TiB, TiB2, TiC). Synchrotron radiation
diffraction was employed to obtain high-resolution diffraction patterns, which were
used to determine the qualitative phase composition of the fabricated titanium
matrix composites. It was demonstrated that using a high-energy set of processing
parameters results in a significant increase in microhardness, reaching up to 750
HV0.3.
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