Microstructures and Wear Resistance of FeCoCrNi-Mo High Entropy Alloy/Diamond Composite Coatings by High Speed Laser Cladding

Abstract

FeCoCrNi-Mo high entropy alloy/diamond composite coatings were successfully prepared by high speed laser cladding. A high scanning speed was adopted (>30 mm/s), and the effects of laser power, scanning speed, and diamond content on the microstructure and wear resistance of the composite coating were studied. The processing parameters of laser cladding had significant influence on the dilution ratio, graphitization of diamond, and wear resistance of the composite coatings. When the laser cladding parameters were 3000 W of laser power and the high scanning speed of 50 mm/s, the composite coating exhibited a uniform microstructure, the lowest dilution ratio, and the best wear resistance. The wear resistance of the composite coating was enhanced with the addition of diamond, but microcracks also increased. When the amount of diamond was 15 wt.%, the best combination of microstructures and wear resistance was obtained.

Effect of phase transformation on mechanical properties of Al16.80Co20.74Cr20.49Fe21.28Ni20.70 high entropy alloy coatings processed by laser cladding

“…And the dilution ratio of V7-V21 are 26.82%, 26.22%, 20.11%, 19.11%, 14.52%, 14.46%, 10.47% and 10.17% respectively, concluded by η= h/ (h + H) [35].…”

Wear and Corrosion Resistance Analysis of FeCoNiTiAlx High-Entropy Alloy Coatings Prepared by Laser Cladding

“…Different laser power has different effects on the morphology and performance of the coating. Wang et al [26] found that when the laser power is 3000 W, the mechanical properties of the FeCoCrNiMo coating reach the best.…”

Special Issue on Surface Treatment by Laser-Assisted Techniques

“…The paper "Microstructures and Wear Resistance of FeCoCrNi-Mo High Entropy Alloy/Diamond Composite Coatings by High Speed Laser Cladding" by Wang et al is devoted FeCoCRNi-Mo high entropy alloy/diamond composite coatings by laser cladding to be used as highly abrasive and wear resistance surface [9]. The authors explain the components proportion and processing parameters optimization to avoid graphitization and diamond thermal damage, and to improve bonding to the metallic matrix.…”

“…Metal-diamond composite coatings are produced by laser cladding by the use of continuous wave diode laser irradiation with optical power in the range 3.0-5.5 kW, robot scanning speed between 30 and 60 mm/s, 4.6 mm spot size, and coaxial powder delivery [9]. Thermal barrier ceramic coatings on a high temperature nickel super alloy are deposited by laser cladding by means of continuous wave diode laser irradiation with optical power in the range 3.5 kW, 10 mm/s scanning speed, 5 mm × 5 mm spot size, and preplaced powder [11].…”