Inconel 625/TiB2 Metal Matrix Composites by Direct Laser Deposition

Abstract

This work presents results in the field of synthesis of new metal matrix composites with matrix NiTi and particles TiB 2 , and their use as additives to fabricate metal matrix composites based on the Inconel 625 alloy. NiTi-TB 2 powders were obtained using self-propagating high-temperature synthesis. Composite NiTi-TiB 2 particles were spheroidized on a high-frequency induction plasmatron. Composite NiTi-TB 2 particles were mixed with metallic Inconel 625 powder with particle sizes of 50-150 µm. We used direct laser deposition by means of mixture of powders to grow samples with different contents of ceramics in the metal matrix. The process of direct laser deposition during the experiment was investigated. We have determined the peculiarities of the formation of the structure in metal matrix composites with different contents of titanium diboride. We have demonstrated the possibility of using Direct Laser Deposition (DLD) for fabricating items from ceramic metal materials. We have determined promising fields of further research for the purpose of obtaining efficient metal matrix composites using additive manufacturing technologies.

High-Temperature Synthesis of Metal–Matrix Composites (Ni-Ti)-TiB2

“…These phases work as a matrix for titanium diboride particles that are distributed inside it. It can be noted that the size of the TiB2 particles in the NiTi-TiB2 composite obtained by SHS from the NiB-Ti powder mixture is by an order of magnitude smaller than that of the materials synthesised from the Ni-Ti-B mixture [26,27]. This confirms the hypothesis that SHS product particles decrease in size when powder compositions are used as initial mixture components, instead of powders made of pure elements.…”

“…In the works [26,27], research was conducted whereby (Ni-Ti)-TiB2 composites were obtained by self-propagating high-temperature synthesis from a Ni-Ti-B powder system. The initial mixture was a stoichiometric mixture of nickel, boron and titanium powders.…”

Numerical Simulation of Plasma Spraying Performance Index

“…The calculation grid with a 45° expansion angle diffuser and 30mm length has 2 160 000 hexagonal elements. [4][5] The block structure and the number of grid elements along each of block sides to calculate the jet without a diffuser is shown in We calculated the flow in ANSYS CFX by control volume analysis using the compressible ideal gas model, enthalpy complete equation to calculate thermal transfer concerning variable density, and k-ε turbulence model. [6][7][8] Given the jet inlet temperature equal to 10 700 К, the air velocity at inlet being 770 m/s, is lower than the sound speed (Mach number 0,3-0,4), that is why we chose the subsonic condition of jet inlet ( Figure Figure 10).…”

Researching the Properties of Samples Fabricated Using Selective Laser Melting from A High-Temperature Nickel-Based Alloy

“…The main experiment parameters, laser power (P, in Watts) and laser scanning speed (υ, in mm/s), the scan direction is the x-axis, were determined from the analysis of the literature [15][16][17][18][19][20][21]. Based on the selected value range for P and υ (P ranged from 170 to 270 W, υ ranged from 750 to 1150 mm/s), a matrix of cube-shaped samples was built (with the size of 7 × 7 × 5 mm) for further metallographic studies for finding pores on the surface.…”