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Friction films analysis and tribological properties of composite antifriction self-lubricating material based on nickel alloy Cover

Friction films analysis and tribological properties of composite antifriction self-lubricating material based on nickel alloy

Materials Science-Poland
Volume 41 (2023): Issue 3 (September 2023)
By: Maciej Robert Roszak,  Adam Kurzawa,  Tetiana Roik,  Oleg Gavrysh,  Iulia Vitsiuk,  Narcis Barsan,  Dariusz Pyka,  Mirosław Bocian and  Krzysztof Jamroziak  
Open Access
|Dec 2023

Figures & Tables

Fig. 1.

Stand and research object: (A) scheme of the test stand, (B) cross-section of the sample, (C) sample for testing, (D) counterface disc

Fig. 2.

Technological manufacturing scheme of the antifriction composite EP975 + 6%CaF2

Fig. 3.

Tested sample: (A) general view of the metallographic specimen, (B) SEM: view of the structure and friction surface at 40× magnification

Fig. 4.

Structure of the developed composite after manufacturing, wt%: EP975 + 6%CaF2: (A) surface electrolytic etching of metallographic microscopy – light microscopy, (B) SEM (detector SE): microstructure with a view of grain boundaries and intermetallic precipitates, (B, C) EDS analysis

Fig. 5.

Antifriction properties of composites studied under different loads and velocity of friction: (A) diagram of the friction coefficient under different loads, (B) diagram of the sample’s wear under different loads, (C) diagram of the counterface’s wear under different loads

Fig. 6.

SEM (SE): view of the sample surface before abrasive wear testing

Fig. 7.

SEM (SE): Friction surface of the EP975 + 6% CaF2 composite after testing with the following parameters: (A, B) P = 2.0 MPa and v = 0.3 m/s, (C, D) P = 5.0 MPa and v = 1.0 m/s

Fig. 8.

SEM (SE): friction surface of the EP975 + 6% CaF2 composite with marked EDS analysis points of elemental composition

Fig. 9.

Spectra from the selected areas on the composite’s friction surface

Fig. 10.

EDS analysis of the distribution of elements along the selected scanning line illustrating the structure of the anti-friction layer on the surface of the EP975 + 6%CaF2 composite as a function of the depth from the surface: (A) transverse line of which EDS was taken, (B) oxygen content, (C) tungsten content, (D) cobalt content, (E) calcium content, (F) fluorine content, (G) nickel content, (H) niobium content, (I) aluminum content, (J) titanium content, (K) iron content, (L) chromium content

Fig. 11.

SEM (SE): Microstructure of the abrasive layer in the composite cross-section view EP975 + 6% CaF2. (A) EDS analysis measurement locations EP975 + 6%CaF2 P = 4.0 MPa, v = 0.5 m/s, (B) P = 2.0 MPa, v = 0.3 m/s, (C) results obtained for areas of the composite friction layer

Fig. 12.

SEM (SE): View of the microstructure of the composite in cross-section after the abrasion process at P = 5.0 MPa and v = 0.5 m/s: (A) formation of a friction film, (B) delamination and fragmentation of the oxide layer

Fig. 13.

SEM (SE): View of the counter-sample surface after the abrasion test at a pressure of P = 3.0 MPa and a speed of 0.5 m/s; designation of measurement areas of EDS elemental composition analysis

Fig. 14.

Spectra from the selected area on counterface’s friction surface

Results of the EDS analysis in selected areas (marked in Fig_ 11) of the cross-section of the friction layer

Analysis pointElement, wt%
OFAlCaTiCrFeCoNiNbMoW
Spectrum 116.644.683.492.120.994.9714.686.1435.960.942.387.01
Spectrum 214.383.713.071.961.155.6216.497.0438.440.491.596.06
Spectrum 30.111.043.990.071.648.320.1811.1661.110.862.489.04
Spectrum 416.744.913.731.981.035.1113.677.0836.930.491.626.71
Spectrum 514.915.793.292.171.115.5614.146.7337.600.711.676.32
Spectrum 60.091.584.770.092.018.060.1010.4357.311.943.0110.61

EDS results of the wear track in selected areas on composite’s friction surface

Analysis pointElement, wt%
OFAlCaTiCrFeCoNiNbMoW
Spectrum 117.244.813.211.941.015.0014.15.8436.860.782.226.99
Spectrum 216.4526.450.8516.870.211.248.481.3125.210.370.971.68
Spectrum 39.120.994.120.071.718.040.2410.4152.011.242.519.54
Spectrum 416.044.513.022.011.045.5413.466.2338.020.652.457.03

Results of the EDS analysis of the chemical composition in selected areas (marked in Fig_ 13) of the friction surface of the EI961Sh counter-sample after the abrasion test of the EP975 + 6%CaF2 composite_ Friction conditions: P = 3_0 MPa and v = 0_5 m/s

Analysis pointElement, wt%
OFAlCaTiCrFeCoNiNbMoWV
Sp. 119.233.992.394.210.795.5421.954.8426.790.152.597.090.44
Sp. 218.023.532.34.020.655.6225.864.8923.550.122.568.540.34
Sp. 312.311.840.440.420.146.5161.161.567.260.110.656.581.02
Sp. 415.072.871.080.980.264.1150.661.8914.920.121.026.660.36

Chemical composition of the material based on nickel alloy EP975

Components, wt%
CWCrMoTiAlNbCoNiCaF2
0.038–0.0768.65–9.317.6–9.52.28–3.041.71–2.094.75–5.131.71–2.599.5–11.4basis4.0–8.0
DOI: https://doi.org/10.2478/msp-2023-0031 | Journal eISSN: 2083-134X | Journal ISSN: 2083-1331
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Language: English
Page range: 1 - 17
Submitted on: Oct 13, 2023
|
Accepted on: Nov 26, 2023
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Published on: Dec 31, 2023
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
composite,
powder nickel alloy,
solid lubricant,
chemical elements,
antifriction film,
self-lubrication
Related subjects:
Materials sciences,
Materials sciences, other,
Nanomaterials,
Functional and smart materials,
Materials characterization and properties

© 2023 Maciej Robert Roszak, Adam Kurzawa, Tetiana Roik, Oleg Gavrysh, Iulia Vitsiuk, Narcis Barsan, Dariusz Pyka, Mirosław Bocian, Krzysztof Jamroziak, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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