Similarity Laws in Direct Metal Deposition of Cermet Tracks
A. A. Golyshev, N. A. Sibiryakova
Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: similarity laws, cermet materials, direct metal deposition, dimensionless parameters
Abstract
Dimensionless parameters and similarity laws that describe the geometric dimensions of a cermet weld bead formed during direct metal deposition are determined. A VT-6 titanium alloy and ceramics (silicon carbide, SiC) with different volume fractions are used as a powder mixture. A model for estimating the thermophysical parameters of a heterogeneous material is proposed. It is shown that, regardless of the volume fraction of ceramics, the dimensionless geometric parameters of a single track (depth, width, and height) depend on two dimensionless parameters: normalized enthalpy and the Peclet number. Also, these dependences can be approximated by algebraic expressions.
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