The effect of gaseous atmospheres on friction and wear of steel–steel contacts

Velkavrh, Igor; Ausserer, Florian; Klien, Stefan; Brenner, Josef; Forêt, Pierre; Diem, Alexander

doi:10.1016/j.triboint.2014.05.027

Cited by 35 publications

(16 citation statements)

References 18 publications

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“…Hence, the COF under Ar condition is very high. The extreme adhesion tendency induces that the upper ball sample (or debris particles) adheres to the uranium surface, which also increases the plastic deformation in the contact and eventually leads to reduced interfacial wear [ 25 , 26 ]. Hence, the low wear volume is obtained under the Ar condition ( Figure 5 b).…”

Section: Resultsmentioning

confidence: 99%

Fretting Wear Damage Mechanism of Uranium under Various Atmosphere and Vacuum Conditions

Cai

et al. 2018

Materials

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A fretting wear experiment with uranium has been performed on a linear reciprocating tribometer with ball-on-disk contact. This study focused on the fretting behavior of the uranium under different atmospheres (Ar, Air (21% O2 + 78% N2), and O2) and vacuum conditions (1.05 and 1 × 10−4 Pa). Evolution of friction was assessed by coefficient of friction (COF) and friction-dissipated energy. The oxide of the wear surface was evaluated by Raman spectroscopy. The result shows that fretting wear behavior presents strong atmosphere and vacuum condition dependence. With increasing oxygen content, the COF decreases due to abrasive wear and formation of oxide film. The COF in the oxygen condition is at least 0.335, and it has a maximum wear volume of about 1.48 × 107 μm3. However, the COF in a high vacuum condition is maximum about 1.104, and the wear volume is 1.64 × 106 μm3. The COF in the low vacuum condition is very different: it firstly increased and then decreased rapidly to a steady value. It is caused by slight abrasive wear and the formation of tribofilm after thousands of cycles.

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Section: Resultsmentioning

confidence: 99%

Fretting Wear Damage Mechanism of Uranium under Various Atmosphere and Vacuum Conditions

Cai

et al. 2018

Materials

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“…The atmosphere composition is the environmental condition with the largest effect on fretting, which can influence the chemical reactions in the contacting surface and then alter the fretting response [ 36 , 37 , 38 ]. Lots of researchers noted the influences of oxygen, humidity, and atmosphere on fretting wear in different gases [ 36 , 37 , 38 , 39 ]. They showed that the wear debris played an important role in the fretting process under different environments.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Displacement Amplitude on Fretting Wear Behavior and Damage Mechanism of Alloy 690 in Different Gaseous Atmospheres

et al. 2021

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The effect of displacement amplitude on fretting wear behavior and damage mechanisms of alloy 690 in air and nitrogen atmospheres was investigated in detail. The results showed that in air, the friction coefficient gradually increased with the increase in displacement amplitude which conformed to the universal law. In nitrogen, however, it had the highest point at the displacement amplitude of 60 μm due to very strong adhesion. Whether in air or nitrogen, the wear volume gradually increased with the increase in displacement amplitude. The wear volume in air was larger than that in nitrogen except at 30 μm. At 30 μm, the wear volume in air was slightly smaller. With an increase in displacement amplitude, a transformation of fretting running status between partial slip, mixed stick-slip, and final gross slip occurred along with the change of Ft-D curves from linear, to elliptic, to, finally, parallelogrammical. Correspondingly, the fretting regime changed from a partial slip regime to a mixed regime to a gross slip regime. With the increase in displacement amplitude, the transition from partial slip to gross slip in nitrogen was delayed as compared with in air due to the strong adhesion actuated by low oxygen content in a reducing environment. Whether in air or nitrogen, the competitive relation between fretting-induced fatigue and fretting-induced wear was prominent. The cracking velocity was more rapid than the wear. Fretting-induced fatigue dominated at 30 μm in air but at 30–60 μm in nitrogen. Fretting-induced wear won the competition at 45–90 μm in air but at 75–90 μm in nitrogen.

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“…Since GFRP composites are used in many tribological applications, the tribological conduct of GFRP composites has indeed been studied [ 2 , 3 ]. The wear and friction coefficients for composite materials are higher and higher in inert gas environments than in air [ 4 , 5 ]. Agrawal et al [ 6 ] discussed film formation using oil lubricant during wear testing of GFRP.…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Lubricating Environment on the Tribological Performance of CNT Filled Glass Reinforced Polymer Composite

et al. 2021

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In recent years, the engineering implications of carbon nanotubes (CNTs) have progressed enormously due to their versatile characteristics. In particular, the role of CNTs in improving the tribological performances of various engineering materials is well documented in the literature. In this work, an investigation has been conducted to study the tribological behaviour of CNTs filled with glass-reinforced polymer (GFRP) composites in dry sliding, oil-lubricated, and gaseous (argon) environments in comparison to unfilled GFRP composites. The tribological study has been conducted on hardened steel surfaces at different loading conditions. Further, the worn surfaces have been examined for a particular rate of wear. Field-emission scanning electron (FESEM) microscopy was used to observe wear behaviours. The results of this study explicitly demonstrate that adding CNTs to GFRP composites increases wear resistance while lowering friction coefficient in all sliding environments. This has also been due to the beneficial strengthening and self-lubrication properties caused by CNTs on GFRP composites, according to FESEM research.

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The effect of gaseous atmospheres on friction and wear of steel–steel contacts

Cited by 35 publications

References 18 publications

Fretting Wear Damage Mechanism of Uranium under Various Atmosphere and Vacuum Conditions

Fretting Wear Damage Mechanism of Uranium under Various Atmosphere and Vacuum Conditions

The Effect of Displacement Amplitude on Fretting Wear Behavior and Damage Mechanism of Alloy 690 in Different Gaseous Atmospheres

Effect of Different Lubricating Environment on the Tribological Performance of CNT Filled Glass Reinforced Polymer Composite

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