scholarly journals Corrosion and Wear performances analysis of PVD CrMoN/Cr Coatings

10.30544/640 ◽  
2021 ◽  
Vol 27 (3) ◽  
pp. 397-409
Author(s):  
Kheireddine BOUZID ◽  
Rim LAMARI ◽  
Nasser Eddine BELIARDOUH ◽  
Corrine NOUVEAU ◽  
Barnali Biswas
Keyword(s):  
Sliding Wear ◽  
Room Temperature ◽  
Corrosion Potential ◽  
Adhesive Wear ◽  
Uncoated Sample ◽  
Electrochemical Tests ◽  
Wear And Corrosion ◽  
Disc Configuration ◽  
Wear Tests ◽  
Ball On Disc

Tools coated CrN based alloys are currently used in several industries for machining and manufacturing, but present severe wear, limiting their service life. Seeking an alternative, three CrMoN monolayers (~1µm in thickness) coatings with varying in the Mo percentage content were elaborated using the RF magnetron co-sputtering method. These coatings were evaluated and compared with the alloy currently used (CrN) by electrochemical tests in NaCl solution (stationary and no stationary method) and sliding wear tests (ball-on-disc configuration) performed at room temperature. The results indicate that the samples coated with CrMoN presented better performance against wear and corrosion than the uncoated sample. Among the coatings, the labeled C1 (27 % Mo) showed the best corrosion resistance as it presents a positive corrosion potential Ecorr. However, the best wear resistance (lowest coefficient of friction) was shown by coating labeled C4 (33 % Mo). All of the tested specimens underwent abrasive wear in addition to adhesive wear.

Phosphorus Content Dependent Sliding Wear Behaviors of Electroless Ni-P Deposits

2010 ◽  
Vol 663-665 ◽  
pp. 1187-1191
Author(s):  
Yan Hai Cheng ◽  
Zhen Cai Zhu ◽  
Zheng Tong Han ◽  
Yong Zou
Keyword(s):  
Sliding Wear ◽  
Phosphorus Content ◽  
Adhesive Wear ◽  
Wear Behavior ◽  
High Phosphorus ◽  
Heat Treated ◽  
Before And After ◽  
Electroless Ni ◽  
Wear Tests ◽  
High Phosphorus Content

In this work, the deposits of electroless Ni-P deposits prepared by different process were studied by means of EPMA, mirohardness tester, friction-wear instrument. The experimental results showed that the microhardness of the deposits was directly affected by the phosphorus content, which was depended on the processes of electroless. The friction-wear tests showed that the Ni-P deposits composing of less phosphorus content exhibited lower friction coefficient before and after being heat treated. The conclusion was drawn that the lower phosphorus content deposits could improve the wear resistance under the condition of both as-plated and after being heat treated Ni-P deposits. The wear behavior was typical of a pure adhesive wear mechanism for the high phosphorus content deposit at as-plated and after being heat treated at 200oC. However, for the high phosphorus content deposit after being heat treated at 400oC, the alternate friction mechanisms were emerged from adhesive wear to abrasive wear with the precipitating of hard Ni3P particles during Ni-P deposits suffering friction tests

A Test of Molybdenum Disulfide Lubricants in Radiation and Vacuum Environments

1969 ◽  
Vol 91 (3) ◽  
pp. 390-395
Author(s):  
J. H. Lewis ◽  
R. H. McDaniel
Keyword(s):  
Environmental Conditions ◽  
Sliding Wear ◽  
Radiation Effects ◽  
Room Temperature ◽  
Radiation Effect ◽  
Aluminum Phosphate ◽  
The Other ◽  
Ball Bearings ◽  
Solid Film ◽  
Wear Tests

Tests have been conducted on two MoS2-base solid-film lubricants, one containing gold and sodium silicate and the other containing bismuth and aluminum phosphate, having potential for application under severe environmental conditions. The lubricant with gold was applied to test races of 440 C steel and Rene´ 41 and exposed with a reactor to 1.5 × 1011 ergs/g(C) of gamma and 8.2 × 1016 neutrons/cm2 (E > 0.1 MeV). The test specimens were subsequently evaluated in sliding-wear tests at temperatures as high as 1200 deg F. Both lubricants were tested in vacuum (∼10−6 torr) and in air on size R-3 ball bearings, which were run at 6000 rpm in servomotors. No significant radiation effects were detected with the MoS2:Au lubricant on 440 C steel in tests at room temperature and 600 deg F. In tests at room temperature, 600 deg F, and 1200 deg F on Rene´ 41, the data indicated a possible radiation effect at 600 deg F but not at the other temperatures. In two vacuum tests on bearings, the MoS2:Au lubricant gave a mean running time of about 110 h. The MoS2:Bi film gave a mean life of 96 h in the first test and 853 h in the second test.

Investigation on fretting wear of Al-Li alloy

2020 ◽  
Vol 72 (7) ◽  
pp. 913-921
Author(s):  
Teng Xiao ◽  
Daosheng Wen ◽  
Shouren Wang ◽  
Mingyuan Zhang ◽  
Beibei Kong ◽  
...  
Keyword(s):  
Peer Review ◽  
Wear Mechanism ◽  
Design Methodology ◽  
Room Temperature ◽  
Adhesive Wear ◽  
Displacement Amplitude ◽  
Fretting Wear ◽  
Content Type ◽  
Mild Wear ◽  
Wear Tests

Purpose This paper aims to investigate the fretting wear mechanism of an Al-Li alloy at room temperature, the tangential fretting wear tests were carried out. Design/methodology/approach The effects of displacement amplitude and fretting frequency on the tangential fretting wear characteristics were mainly investigated. The experimental data obtained are analyzed and compared. Findings The results indicated that the fretting friction coefficient increased with the increase of displacement amplitude. As the displacement amplitude increased, the wear scar morphology changed significantly, mainly in terms of delamination debris and furrow scratches. The wear mechanism changed from initial mild wear to more severe oxidative wear, adhesive wear and abrasive wear. Originality/value This paper extends the knowledge into mechanical tight connections. The conclusions can provide theoretical guidance for the fretting of mechanical tight connections in the field of automotive lightweight and aerospace. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-11-2019-0490/

scholarly journals Wear Characteristics of FeW/FeW-B4C Coatings Produced by TIG Process

2017 ◽  
Vol 62 (4) ◽  
pp. 2001-2006
Author(s):  
S. Islak
Keyword(s):  
Wear Behavior ◽  
Cost Effective ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Wear Properties ◽  
Cost Effective Approach ◽  
Low Levels ◽  
Disc Configuration ◽  
Wear Tests ◽  
Ball On Disc

AbstractIn this study, wear properties of FeW-B4C coatings produced by tungsten inert gas (TIG) process on the AISI 1060 steel were investigated. TIG process was selected because it is a cost-effective approach for melting-based coatings. The treated surfaces were evaluated and characterized by means of scanning electron microscope (SEM), X-ray diffraction analysis, and electron dispersive spectrometry (EDS). The microhardness and wear experiment were also performed by using a microhardness machine and ball-on-disk tribometer. SEM observations showed that the obtained coating had a smooth and uniform surface. According to XRD analysis, borides and carbides phases formed in the coatings. The wear behavior of the coatings was compared with ball-on-disc configuration wear tests, at the same conditions. Average coefficient of friction values of the coatings were obtained at relatively low levels.

Electrical Sliding Wear Property of Cu-Ag-Cr Alloy

2006 ◽  
Vol 118 ◽  
pp. 497-502 ◽  
Author(s):  
Ping Liu ◽  
Shu Guo Jia ◽  
Feng Zhang Ren ◽  
Bao Hong Tian ◽  
Mao Sheng Zheng
Keyword(s):  
Abrasive Wear ◽  
Sliding Wear ◽  
Adhesive Wear ◽  
Electrical Current ◽  
Vacuum Induction Furnace ◽  
Wear Property ◽  
Erosion Wear ◽  
Sliding Speed ◽  
Electrical Erosion ◽  
Wear Tests

By means of a vacuum induction furnace, Cu-Ag-Cr alloy were produced. The wear property and mechanism of Cu-Ag-Cr alloy are studied, and its property was compared with a Cu-Ag alloy. The microstructure of the Cu-Ag-Cr alloy before wear tests was analyzed by transmission electron microscopy. Worn surfaces of the Cu-Ag-Cr alloy were analyzed by scanning electron microscope (SEM) and energy dispersive X-ray spectrum (EDS). Wear tests were conducted under laboratory with a special sliding wear apparatus that simulated the tribological conditions of sliding current collectors on contact wires, and alloy wire was slid against a copper-based powder metallurgy strip under unlubricated conditions. The results show that the wear rate of Cu-Ag-Cr alloy increase with the increase in the sliding speed and the sliding distance. Adhesive wear, abrasive wear and electrical erosion wear are the dominant mechanisms under the electrical current sliding processes. At lower sliding speed, adhesives wear and abrasive wear are the major wear damage, while electrical erosion wear and adhesive wear are the major at higher sliding speed. Under the same conditions, the wear resistance of the Cu-Ag-Cr alloy is 2~3 times of the Cu-Ag alloy.

Effect of Sliding Speed and Loads on Tribological Behaviors of Iron and Cobalt-Based High-Temperature Alloys against Al2O3 Balls

2016 ◽  
Vol 861 ◽  
pp. 241-246
Author(s):  
Chang Ming Huang ◽  
Bin Zou ◽  
Yan An Liu ◽  
Shuai Zhang
Keyword(s):  
High Temperature ◽  
Sliding Wear ◽  
Adhesive Wear ◽  
Dry Sliding Wear ◽  
High Temperature Alloy ◽  
Sliding Speed ◽  
Test Conditions ◽  
High Temperature Alloys ◽  
Worn Surface ◽  
Ball On Disc

The dry sliding wear behaviors of iron and cobalt-based high-temperature alloys against Al2O3 with different sliding speed under various loads were investigated using a ball-on-disc tribo-tester. The friction coefficient of both high-temperature alloys decreased with the increasing speed and load. The GH605 exhibited the stronger wear resistance than GH2132 under all test conditions. The adhesion layer and oxides were found on the worn surface of Al2O3, and the high-temperature alloy would react with air and the wear mechanisms might be adhesive wear and oxidative wear.

Tribological Properties of Ti-Al Alloy Self-Lubricating Composite Materials

2013 ◽  
Vol 842 ◽  
pp. 114-117
Author(s):  
Xiu Ling Wang ◽  
Li Ying Yang ◽  
Shou Ren Wang ◽  
Yi Zhang
Keyword(s):  
Sliding Wear ◽  
Solid Lubricant ◽  
Al Alloy ◽  
Test Results ◽  
Weight Percentage ◽  
Dry Conditions ◽  
Hot Pressing Sintering ◽  
Worn Surface ◽  
Wear Tests ◽  
Self Lubricating Composites

A series of Ti-48Al-2Cr-2Nb/62%BaF2-38%CaF2 (CB) self-lubricating composites with addition of different weight percentage of solid lubricant were prepared by vacuum hot pressing sintering. Sliding wear tests against 45#steel were performed on the specimen in dry conditions, worn morphology was observed by the scanning electron microscope (SEM). The test results show that when addition of solid lubricant weight percentage is 10%, the worn surface of the composites is most smooth.The main wear mechanisms of Ti-48Al-2Cr-2Nb/62%BaF2-38%CaF2 composite are abrasive wear and adherent wear.

Dry sliding wear behaviour of AA 6351-ZrB2 in situ composite at room temperature

2010 ◽  
Vol 31 (3) ◽  
pp. 1526-1532 ◽  
Author(s):  
G. Naveen Kumar ◽  
R. Narayanasamy ◽  
S. Natarajan ◽  
S.P. Kumaresh Babu ◽  
K. Sivaprasad ◽  
...  
Keyword(s):  
Sliding Wear ◽  
Room Temperature ◽  
Wear Behaviour ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
In Situ Composite ◽  
Sliding Wear Behaviour

Microstructure and wear resistance of Cuss-toughened Cr5Si3/CrSi metal silicide alloys

2005 ◽  
Vol 20 (5) ◽  
pp. 1122-1130 ◽  
Author(s):  
Y.X. Yin ◽  
H.M. Wang
Keyword(s):  
Solid Solution ◽  
Wear Resistance ◽  
Sliding Wear ◽  
Room Temperature ◽  
Wear Test ◽  
Melting Process ◽  
Dry Sliding Wear ◽  
Metal Silicide ◽  
X Ray Diffraction ◽  
X Ray

Wear-resistant Cu-based solid-solution-toughened Cr5Si3/CrSi metal silicide alloy with a microstructure consisting of predominantly the dual-phase primary dendrites with a Cr5Si3 core encapsulated by CrSi phase and a small amount of interdendritic Cu-based solid solution (Cuss) was designed and fabricated by the laser melting process using Cr–Si–Cu elemental powder blends as the precursor materials. The microstructure of the Cuss-toughened Cr5Si3/CrSi metal silicide alloy was characterized by optical microscopy, powder x-ray diffraction, and energy dispersive spectroscopy. The Cuss-toughened silicide alloys have excellent wear resistance and low coefficient of friction under room temperature dry sliding wear test conditions with hardened 0.45% C carbon steel as the sliding–mating counterpart.

Effect of tribological parameters on sliding wear and friction coefficient which relates to preload loss in tapered roller bearing

2019 ◽  
Vol 71 (1) ◽  
pp. 61-73 ◽  
Author(s):  
Ayush Jain ◽  
Abhishek Singh ◽  
Arendra Pal Singh
Keyword(s):  
Sliding Wear ◽  
Roller Bearing ◽  
Wear Test ◽  
Thickness Effect ◽  
Surface Parameters ◽  
Content Type ◽  
Tapered Roller Bearing ◽  
Tapered Roller ◽  
Tribological Parameters ◽  
Ball On Disc

Purpose This paper aims to study the sliding wear and coefficient of friction (COF) using “ball on disc” tribometer. Discs of bearing steel were subjected to different tribological parameters such as heat treatment (through hardening and case hardening), sliding speed, sliding distance and micro-geometry of the functional ball and disc point contact. Results obtained from tribometer were correlated with the preload loss in tapered roller bearing. Preload loss is subjected to wear rate pattern with respect to the internal geometry and micro-geometry of functional surfaces of the tapered roller bearing, caused by internal resistance between roller large ends sliding against cone supporting face. This confirms the optimum geometry and physical/mechanical property of the tapered roller bearing, which makes the use of these bearings under the demanding application in the automotive industry such as differential gears and installation of pinions of differential gears in power transmissions or wheels. Design/methodology/approach The paper opted for an exploratory study using the design of experiments with full factorial method. The approach was to do ball on disc sliding wear test and correlate that sliding wear with preload loss in tapered roller bearing. Findings The paper provides the limit of preload loss in tapered roller bearing. Research limitations/implications Because of the chosen research approach, the research lacks the effect of environmental conditions such as temperature and relative humidity and lube film thickness effect on wear test. It also lacks the validation part with actual preload loss on tapered roller bearings. Above work is included in future scope of work. Practical implications This paper includes the recommendation for surface parameters which can increase the bearing life by reducing the preload loss in tapered roller bearing. Social implications This paper includes the recommendation for surface parameters for bearing manufacturing industries. Originality/value This paper provides the relation between sliding wear and preload loss in tapered roller bearing.

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