A novel method to fabricate Ni/WC composite coatings by laser wire deposition: Processing characteristics, microstructural evolution and mechanical properties under different wire transfer modes

Zhao, Shengbin; Yang, Lijun; Huang, Yue; Xu, Sai

doi:10.1016/j.addma.2020.101738

Cited by 13 publications

(11 citation statements)

References 44 publications

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“…These homogeneously formed precipitates (< 15 μm) have triangle and rectangle morphologies presence throughout the whole thickness of the overlay, as also observed by Zhao et al [55]. EDS analysis results on these precipitates (see Table 10, points 3-6) indicate high W and C concentrations ranging from 69 to 72 wt.% and 18 to 21 wt.%, respectively; therefore, these tiny particles can be identified as primary WC precipitates formed from free W and C (due to dissolution of WC particles) in the molten pool during the solidification process, as also reported in previous literature [16,18,42,55]. The formation of primary WC can be realized by considering the C-rich side of the Ni-W-C ternary phase diagram [56], where WC grains develop into a three-dimensional triangular prism via a layer-by-layer growth mechanism.…”

Section: Microstructure Characterization Of Sample 3 (Aip: 085 Kw)supporting

confidence: 78%

“…According to the EDS results (Fig. 18 and Table 12) and studies by other researchers [16,42], points 1 and 2 can be characterized as Fe 3 W 3 C and points 6-8 as Ni 2 W 4 C. Furthermore, the diffusion zone at the substrate/overlay interface is wider than samples 3 and 7. EDS result of point 3 shows a higher concentration of dissolved Fe at a level of 24.6 wt.% (see Table 12), consistent with its higher DL.…”

Section: Microstructure Characterization Of Sample 10 (Aipmentioning

confidence: 69%

“…The formation of primary WC can be realized by considering the C-rich side of the Ni–W–C ternary phase diagram [ 56 ], where WC grains develop into a three-dimensional triangular prism via a layer-by-layer growth mechanism. Random cross-sectioning of primary WC triangular prism [ 57 ] is responsible for the different morphology observed, varying from equilateral triangles, isosceles triangles, and irregular triangles to quadrilaterals [ 42 ].…”

Section: Resultsmentioning

confidence: 99%

“…f p is a function of the linear mass of the electrode ( l m ), powder weight percentage ( P p ), density of powder ( ρ p ), and nickel sheath area ( A Ni-sheath ), which can be calculated using Eqs. ( 4 )–( 6 ) [ 42 ]. …”

Section: Methodsmentioning

confidence: 99%

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Taguchi-based experimental investigation into weld cladding of Ni-WC MMC overlays by CMT process

Karimi

Wang

Jelovica

2022

Int J Adv Manuf Technol

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In the search for versatile and effective weld cladding processes to deposit ultra-wear-resistant Ni-WC MMC (Ni-based tungsten carbide metal matrix composite) overlays for mining applications, there is an increasing interest in exploring advanced low-heat-input cold metal transfer (CMT) method. Depositions of single weld bead tracks of Ni-WC MMCs on steel plates were performed by employing the CMT process; Taguchi’s design of experiments was used to plan the experimental investigation. All weld tracks exhibit continuous and uniform bead profile and sound metallurgical bonding to the substrate. Retained WCs are present in the overlay tracks relatively uniformly. The formation of primary WC and secondary carbides is observed depending on the level of dilution. In contrast to standard gas metal arc welding processes, the volume fraction of retained WC, which is negatively correlated with dilution level, is not directly interrelated with heat input for the CMT process and can reach a high level together with improved weld bead appearance at high deposition rate. Deposition rate has a positive correlation with average instantaneous power, which is, in turn, positively correlated with wire feed speed. The addition of oxygen into shielding gas mixtures promotes carbide transfer from cored feed wire to the weld track and increases the volume fraction of retained WC. Analysis of signal-to-noise ratios shows that it is difficult to find a single set of optimized processing parameters, and trade-offs are needed in engineering practice. The present investigation demonstrates that the Taguchi method is a powerful tool in process improvement for weld cladding of Ni-WC MMC overlays.

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Section: Microstructure Characterization Of Sample 3 (Aip: 085 Kw)supporting

confidence: 78%

Section: Microstructure Characterization Of Sample 10 (Aipmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Taguchi-based experimental investigation into weld cladding of Ni-WC MMC overlays by CMT process

Karimi

Wang

Jelovica

2022

Int J Adv Manuf Technol

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“…The wear mechanism of the coating is mainly abrasive wear. [28] As for the H13 steel substate, deep grooves and partial peeling indicate that its wear mechanism is a combination of abrasive wear and adhesive wear.…”

Section: Microhardness and Wear Propertymentioning

confidence: 99%

Enhanced corrosion and wear properties of H13 steel with Co‐based alloy coating prepared by laser cladding

Zhang

Wang

et al. 2022

Materials & Corrosion

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In this study, Stellite 21 Co‐based alloy coating was prepared on the surface of the H13 steel substrate by laser cladding. The phase composition, microstructure, chemical constitution, microhardness, and wear property of the coating were studied, respectively. The corrosion resistance of the coating was evaluated by electrochemical test and salt spray test. The results show that the coating is mainly composed of γ‐Co, CoCx, and Cr7C3 phases. γ‐Co solid solution matrix separates within the dendrites, while Mo‐rich intermetallic phases and carbides separate in the interdendritic regions. The average microhardness of the coating is twice that of the H13 substrate. The wear loss of the coating is 74.3% lower than that of the substrate, exhibiting better wear resistance. The main strengthening mechanisms of the coating are solid solution strengthening and second phase strengthening. The self‐corrosion potential of the coating is more positive than that of the H13 steel and the corrosion current density is only 1/160 of the H13 steel. The salt spray test after 168 h reveals that the coating exhibits much better corrosion resistance than that of the substrate.

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Laser‐Directed Energy Deposition Additive Manufacturing of Nickel–Titanium Coatings: Deposition Morphology, Microstructures, and Mechanical Properties

Yuan

Lin

et al. 2022

Adv Eng Mater

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To overcome the disadvantages of comparatively poor surface hardness and deprived resistance against wear of Ti–6Al–4V alloy, the protective NiTi coatings are fabricated at different processing parameters by laser‐directed energy deposition (LDED). This work presents a comprehensive study of deposition morphology, phase constituents, microstructural evolution, composition distribution, and mechanical properties of as‐fabricated NiTi deposition tracks. The relationship among processing parameters and deposition morphology, phase constituents, and mechanical properties is established. The microstructural evolution mechanism and the composition distribution on the cross section of deposition tracks are revealed. Results show that the deposition tracks are successfully formed under all laser processing parameters, and the dilution ratio increases with the increase in laser power and scanning speed. The deposition tracks consist of NiTi2, NiTi, and α–Ti. According to the microstructural analysis, planar crystals are formed between the substrate and the deposition tracks, and columnar and equiaxed dendrites are found in the deposition tracks. The average microhardness increases continuously with the increase in laser power. The deposition track prepared at laser power of 1400 W has the highest average microhardness of 732.45 HV0.2. The deposition track at this laser power exhibits excellent wear properties, with a wear rate of 2.25 × 10−6 mm3 Nm−1.

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A novel method to fabricate Ni/WC composite coatings by laser wire deposition: Processing characteristics, microstructural evolution and mechanical properties under different wire transfer modes

Cited by 13 publications

References 44 publications

Taguchi-based experimental investigation into weld cladding of Ni-WC MMC overlays by CMT process

Taguchi-based experimental investigation into weld cladding of Ni-WC MMC overlays by CMT process

Enhanced corrosion and wear properties of H13 steel with Co‐based alloy coating prepared by laser cladding

Laser‐Directed Energy Deposition Additive Manufacturing of Nickel–Titanium Coatings: Deposition Morphology, Microstructures, and Mechanical Properties

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