Significantly lowered coefficient of friction in copper alloy with a gradient nanograined-nanotwinned surface layer

Wu, Bo; Fu, Hui; Sun, Wanting; Yang, Wenqing; Luo, Junlong; Yang, Xu Sheng

doi:10.1016/j.wear.2022.204517

Cited by 8 publications

(3 citation statements)

References 62 publications

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“…Figure 11 shows the worn surface SEM microscope morphology of the FG and CG samples under the high normal load of 30 N. The width of worn tracks is much wider than that of the samples under the low load of 5 N. This is because the worn surface automatically accumulates around and increases the area of the worn track surface [ 36 ]. The average friction coefficient of the FG and CG samples shows that the friction coefficient of both samples is much lower under a high load than that under the low load.…”

Section: Resultsmentioning

confidence: 99%

Effect of Grain Size on the Tribological Behavior of CoCrFeMnNi High Entropy Alloy

et al. 2023

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The effect and mechanism of grain sizes on the tribological behavior of CoCrFeMnNi high entropy alloy (HEA) were studied by friction experiments and wear morphology analysis. Under normal low load and low sliding speed, the primary wear mechanism of the HEA samples is adhesive wear. With the increase in sliding speed, the wear mechanisms of the samples are adhesive wear and oxidation wear. The oxide layer formed under the action of friction heat of the coarse grain (CG) sample is easy to break due to the softening of the CG. With the increase of normal load and sliding speed, the wear mechanisms of the HEA samples are mainly adhesive wear, oxidation wear, and plastic deformation. The oxide layer of CG sample has many cracks, and the worn surface also has plastic deformation, which leads to the increase of friction coefficient and specific wear rate and the decrease of wear resistance. Therefore, the fine grain size HEA sample has better wear resistance than the CG sample due to its high surface strength.

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Section: Resultsmentioning

confidence: 99%

Effect of Grain Size on the Tribological Behavior of CoCrFeMnNi High Entropy Alloy

et al. 2023

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“…According to Faraday's formula, the required times for deposition of the copper layer with a thickness of 25, 50, and 100 μm (at a constant current density of 2.5 A/dm 2 (, were 45, 90, and 180 min, respectively. The thickness range of copper deposits in the industry is usually between 20 and 100 µm [9–12,17,21]. The current efficiency of all coating was calculated using the following equation: m theoritical is the weight obtained from Faraday's formula and the m practical is the subtraction of sample weight before and after copper coating.…”

Section: Methodsmentioning

confidence: 99%

“…With the increase of sliding speed in copper coatings, its specific wear speed will decrease and will reach below 0.02 (m 3 /Nm × 10 −5 ). In addition, in this condition, its friction coefficient will reach below 0.5 [7–9]. Some studies have been reported on the use of copper layers on zirconium or other materials with a similar structure such as titanium.‏ Metallurgical changes due to structural differences have been evident in these cases [10–13].…”

Section: Introductionmentioning

confidence: 99%

Investigation of electrodeposited copper layer with island twinning structure on Zr substrate

Karimi,

Hadipour,

Araghchi

et al. 2023

Surface Engineering

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In this study, the surface properties of copper layers on a zirconium substrate were investigated. The copper deposits with thicknesses of 25, 50, and 100 μm were formed using the electroplating method. The evaluations of coating thickness, surface morphology, crystallite size, and grain distribution were performed by using the relevant analytical equipment. The results showed that by increasing the thickness of the copper layer, a more uniform cauliflower morphology was obtained. Also, by increasing the thickness of the copper deposit, the crystallite size was decreased from 70 to 20 nanometers and the strain energy was decreased from 2.9 × 10 −3 J to 6.5 × 10 −3 J. The copper layer with a thickness of 100 μm was the most wear resistance compared to other coatings. The highest hardness value, uniform morphology, and more twin islands in different areas were the main reasons for improving the wear resistance of the copper layer with a thickness of 100 μm.

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Quantitative study of corrosion and wear under different constant tensile stress of additively manufactured Ti-based composite coatings

Zhang,

Cui,

Liu

et al. 2024

Corrosion Science

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Significantly lowered coefficient of friction in copper alloy with a gradient nanograined-nanotwinned surface layer

Cited by 8 publications

References 62 publications

Effect of Grain Size on the Tribological Behavior of CoCrFeMnNi High Entropy Alloy

Effect of Grain Size on the Tribological Behavior of CoCrFeMnNi High Entropy Alloy

Investigation of electrodeposited copper layer with island twinning structure on Zr substrate

Quantitative study of corrosion and wear under different constant tensile stress of additively manufactured Ti-based composite coatings

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