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The structure and properties of laser-cladded Inconel 625/TiC composite coatings Cover

The structure and properties of laser-cladded Inconel 625/TiC composite coatings

Materials Science-Poland
Volume 40 (2022): Issue 4 (December 2022)
By:
Open Access
|Apr 2023

Figures & Tables

Fig. 1

Vickers microhardness measuring lines scheme: (A) measurements across the beads and (B) measurements from the surface to base material
Vickers microhardness measuring lines scheme: (A) measurements across the beads and (B) measurements from the surface to base material

Fig. 2

Surface view of coatings after penetrant testing: (A) C5 and (B) C6 (designations according to Table 2)
Surface view of coatings after penetrant testing: (A) C5 and (B) C6 (designations according to Table 2)

Fig. 3

Macrographs of laser-cladded coatings (designations according to Table 2)
Macrographs of laser-cladded coatings (designations according to Table 2)

Fig. 4

Microstructure of central bead areas of composite Inconel 625/TiC coatings: (A) C1, (B) C2, and (C) C4 (designation according to Table 3). TiC, titanium carbide
Microstructure of central bead areas of composite Inconel 625/TiC coatings: (A) C1, (B) C2, and (C) C4 (designation according to Table 3). TiC, titanium carbide

Fig. 5

Microstructure of metallic Inconel 625 coatings
Microstructure of metallic Inconel 625 coatings

Fig. 6

XRD results of the respective composite Inconel 625/TiC coating. TiC, titanium carbide; XRD, X-ray diffraction
XRD results of the respective composite Inconel 625/TiC coating. TiC, titanium carbide; XRD, X-ray diffraction

Fig. 7

EDS maps of composite Inconel 625/TiC coating matrix. EDS, energy-dispersive spectroscopy; SEM, scanning electron microscope; TiC, titanium carbide
EDS maps of composite Inconel 625/TiC coating matrix. EDS, energy-dispersive spectroscopy; SEM, scanning electron microscope; TiC, titanium carbide

Fig. 8

Microstructure of overlap areas of composite Inconel 625/TiC coatings, magnification a) 1000x, b) 3000x TiC, titanium carbide
Microstructure of overlap areas of composite Inconel 625/TiC coatings, magnification a) 1000x, b) 3000x TiC, titanium carbide

Fig. 9

EDS maps of the overlap area of composite Inconel 625/TiC coatings. EDS, energy-dispersive spectroscopy; SEM, scanning electron microscope; TiC, titanium carbide
EDS maps of the overlap area of composite Inconel 625/TiC coatings. EDS, energy-dispersive spectroscopy; SEM, scanning electron microscope; TiC, titanium carbide

Fig. 10

Vickers microhardness results: (A) average microhardness, (B) microhardness distribution across the beads, and (C) microhardness distribution from the surface to the base material (designation according to Table 3)
Vickers microhardness results: (A) average microhardness, (B) microhardness distribution across the beads, and (C) microhardness distribution from the surface to the base material (designation according to Table 3)

Fig. 11

Potentiodynamic polarization curves of M1, C1, C3, and C5 laser cladded coatings (designation according to Table 3). SCE, saturated calomel electrode
Potentiodynamic polarization curves of M1, C1, C3, and C5 laser cladded coatings (designation according to Table 3). SCE, saturated calomel electrode

Fig. 12

Morphologies of corrosion damage after potentiodynamic polarization tests, SEM, and coatings: (A) M1, (B) C1, (C) C3, and (D) C5. SEM, scanning electron microscope; EHT, electron high tension voltage; BSD, backscattered electron detector; WD, working distance
Morphologies of corrosion damage after potentiodynamic polarization tests, SEM, and coatings: (A) M1, (B) C1, (C) C3, and (D) C5. SEM, scanning electron microscope; EHT, electron high tension voltage; BSD, backscattered electron detector; WD, working distance

Laser cladding parameters

DesignationPowder TiC content (vol.%)Laser power (W)Speed (m/min)Powder feed rate (g/mm)
M1M202.1000.250.040.05
C1C2100.040.05
C3C4200.040.05
C5C6400.040.05

Electrochemical parameters of laser-cladded coatings (designation according to Table 2)

Designationjcorr (μA/cm2)Ecorr (V)
M18.0−0.384
C112.0−0.412
C383.0−0.473
C58.9−0.377

Thickness, dilution, and TiC fraction measurement results

Designation (Table 2)Thickness (mm)Dilution (%)Measured TiC fraction (vol.%)
M11.63.3-
M22.12.1-
C11.725.58.8
C22.112.69.8
C31.817.518.3
C42.29.819.6
C51.914.638.6
C62.37.539.7

Chemical composition of S355JR substrate and Metcoclad 625 powder

Material designationCMnSiPSCrNiMoNbAlCuFe
wt.%
S355JR0.21.50.2–0.5Max. 0.04Max. 0.04Max. 0.3Max. 0.3--Max. 0.02Max. 0.03Balance
Oerlikon Metcoclad 625-----20.0–23.058.0–63.08.0–10.03.0–5.0--Max 5.0

Average chemical composition of coatings

Designation (Table 2)NiCrMoNbFeTi
wt.%
M160.7 ± 1.619.8 ± 0.510.2 ± 0.84.6 ± 0.14.7 ± 1.1-
M263.6 ± 0.620.7 ± 0.39.5 ± 0.54.4 ± 0.61.8 ± 0.3-
C149.1 ± 1.116.2 ± 0.48.1 ± 0.64.7 ± 0.418.0 ± 1.02.7 ± 0.5
C254.1 ± 4.717.6 ± 1.49.3 ± 1.14.2 ± 0.97.9 ± 2.63.5 ± 1.1
C350.3 ± 1.316.6 ± 0.29.7 ± 1.43.9 ± 0.314.4 ± 0.85.4 ± 2.1
C455.1 ± 1.918.1 ± 0.510.1 ± 1.35.1 ± 0.25.1 ± 1.66.4 ± 1.3
C544.1 ± 2.914.1 ± 2.27.4 ± 0.94.3 ± 0.514.5 ± 3.914.6 ± 3.8
C647.0 ± 4.916.0 ± 1.88.6 ± 1.44.8 ± 0.83.3 ± 1.919.7 ± 8.5
DOI: https://doi.org/10.2478/msp-2022-0026 | Journal eISSN: 2083-134X | Journal ISSN: 2083-1331
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Language: English
Page range: 91 - 103
Submitted on: Jul 12, 2022
Accepted on: Aug 16, 2022
Published on: Apr 10, 2023
Published by: Sciendo
In partnership with: Paradigm Publishing Services
Publication frequency: 4 times per year
Keywords:
composite coatings,
nickel-based superalloys,
laser cladding
Related subjects:
Materials sciences,
Materials sciences, other,
Nanomaterials,
Functional and smart materials,
Materials characterization and properties

© 2023 Aleksandra Lont, Tomasz Poloczek, Jacek Górka, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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