Tribofilm formation on the VN/7075 composite surface under sulfur-containing boundary lubrication

Bai, Yaping; Liu, Mengmeng; Li, Jianping; Guo, Yongchun

doi:10.1177/1350650120930165

Cited by 5 publications

(6 citation statements)

References 28 publications

(25 reference statements)

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“…Friction heat will increase the instantaneous temperature of the worn surface, resulting in varying degrees of oxidation of the worn surface. The oxide layer forms rapidly in the contact area and grow in a layered structure, which will reduce the direct contact between the worn surface and the friction pair, then protect the worn surface [ 29 ]. When the oxide layer reaches a certain thickness, the adhesion between the oxide layer and the substrate will reduce and resulting in spalling.…”

Section: Resultsmentioning

confidence: 99%

“…In conclusion, VN and TiB 2 -TiC x particles can be introduced into 7075 aluminum alloy matrix to develop aluminum matrix composites with excellent microstructure, mechanical properties, and high wear resistance. According to the previous research on the wear properties of different contents of VN reinforced Al 7075 matrix composites, it is found that 15 wt.% VN/7075 composites had excellent friction and wear properties in sulfur atmosphere [ 29 ]. Besides, TiB 2 -TiC x /7075 composites have good comprehensive room temperature mechanical performance when TiB 2 -TiC x content was 20 wt.% [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

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Effect of VN and TiB2-TiCx Reinforcement on Wear Behavior of Al 7075-Based Composites

et al. 2021

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Al 7075 alloy, 15 wt.% VN/7075 composites, and 20 wt.% TiB2-TiCx/7075 composites were prepared by ball milling with subsequent hot-pressing sintering. The microstructure, hardness, and wear properties at room temperature to 200 °C of Al 7075-based composites with different reinforcement phases were discussed. The grain uniformity degree values of 15 wt.% VN/7075 composites and 20 wt.% TiB2-TiCx/7075 composites were 0.25 and 0.13, respectively. The reinforcement phase was uniformly distributed in 15 wt.% VN/7075 composites and 20 wt.% TiB2-TiCx/7075 composites, almost no agglomeration occurred. The order of hardness was 20 wt.% TiB2-TiCx/7075 composites (270.2 HV) > 15 wt.% VN/7075 composites (119.5 HV) > Al 7075 (81.8 HV). At the same temperature, the friction coefficient of 15 wt.% VN/7075 composites was the lowest, while the volume wear rate of 20 wt.% TiB2-TiCx/7075 composites was the lowest. With the increase of temperature, the wear mechanism of Al 7075 changed from spalling wear to oxidation wear and adhesion wear. However, the wear mechanisms of 15 wt.% VN/7075 and 20 wt.% TiB2-TiCx/7075 composites changed from abrasive wear at room temperature to wear mechanism (oxidation wear, abrasive wear, and adhesive wear) at medium and low temperature. Comprehensive wear test results indicated that 20 wt.% TiB2-TiCx/7075 composites had excellent tribological properties at medium and low temperature.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of VN and TiB2-TiCx Reinforcement on Wear Behavior of Al 7075-Based Composites

et al. 2021

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“…The formation of tribofilm can significantly decrease the COF and wear ratio. Bai et al [229] found that under sulfur-containing boundary lubrication condition, the tribofilm layer formed on the worn surface of 15 wt% VN/7075 composite significantly decreased the friction coefficient compared with the Al7075 alloy. Zhao et al [230] proposed that the excellent tribological properties under high temperature are attributed to the formation of physical adsorption Fig.…”

Section: Tribofilmmentioning

confidence: 99%

A review of advances in tribology in 2020–2021

Meng

et al. 2022

Friction

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Around 1,000 peer-reviewed papers were selected from 3,450 articles published during 2020–2021, and reviewed as the representative advances in tribology research worldwide. The survey highlights the development in lubrication, wear and surface engineering, biotribology, high temperature tribology, and computational tribology, providing a show window of the achievements of recent fundamental and application researches in the field of tribology.

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“…In another route, after milling process, the mixed powders were packed in a graphite mold and then cold pressed. Subsequently, the graphite mold was fixed in vacuum hot press sintering furnace to produce the composite compacts [18,103]. As alternate process, the authors [12] produced composite by first milling the matrix and reinforcements followed by encapsulating in pure Cu container with subsequent pressing by equal channel angular pressing (ECAP) route.…”

Section: Type Of Limitation Referencesmentioning

confidence: 99%

“…Si 3 N 4 under heat treated condition has reduced up to 11.03% which is in comparison to pure heat treated AA7075. Engine piston [103] Variation of hardness, tensile strength and flexural strength as a function of quantity of reinforcements are shown in Figure 16.…”

Section: Fspmentioning

confidence: 99%

Reinforcements, production techniques and property analysis of AA7075 matrix composites − a critical review

et al. 2021

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Aluminium alloy based metal matrix composites are being extensively used in the aerospace, automobile, defense, marine and electronic industries owing to their excellent strength, high resistance to wear, corrosion and better thermal stability. Many investigators have explored different aluminium alloy series composites, like heat treatable AA2024, AA6061 and AA7075 since the properties of these matrix alloys can be easily tailor made to suite specific application due to easy processability and heat treatability. AA7075 alloy matrix is predominantly being used, as it exhibits high ultimate tensile strength, resistance to corrosion and fatigue in the group. In the current review work, attention is focused to present types of reinforcing materials used, benefits of reinforcement hybridization, methods employed for composite production and critical property analysis, with conclusions of experimentation and the suggested prospective applications of AA7075 composites. Due to good castability and moldability variety of processing techniques in solid, semisolid and liquid states are possible. As matrix alloy, low processing temperature, ability to accommodate reinforcements and adoptability to different reinforcing techniques, it is easy to obtain optimal properties as per the application. AA7075 with small addition of copper is paved the path in the field of electronic and military applications due to high thermal and electrical conductance. Even pure metal addition & magnesium with copper facilitate good weldability, plasticity and corrosion resistance. Due to the flexibility in accommodating carbide and oxide compound reinforcements in the matrix, this matrix composite widens versatility limit due to excellent hardness and wear resistance. CNT and graphite reinforcements to this aluminium series matrix are marked as ultra-high precision components in defense field.

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Tribofilm formation on the VN/7075 composite surface under sulfur-containing boundary lubrication

Cited by 5 publications

References 28 publications

Effect of VN and TiB2-TiCx Reinforcement on Wear Behavior of Al 7075-Based Composites

Effect of VN and TiB2-TiCx Reinforcement on Wear Behavior of Al 7075-Based Composites

A review of advances in tribology in 2020–2021

Reinforcements, production techniques and property analysis of AA7075 matrix composites − a critical review

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