scholarly journals Study on the Self-Organization of an Fe-Mn-C-B Coating during Friction with Surface-Active Lubricant

Materials ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3025 ◽  
Author(s):  
Marcin Barszcz ◽  
Mykhaylo Pashechko ◽  
Krzysztof Dziedzic ◽  
Jerzy Jozwik
Keyword(s):  
Friction Pair ◽  
Self Organization ◽  
Sliding Velocity ◽  
Laminar Structure ◽  
Friction Process ◽  
Nickel Chromium ◽  
Before And After ◽  
Pin On Disc ◽  
Surface Active ◽  
Sliding Distance

This paper investigates the friction process between an Fe-based coating and C45 steel with surface-active lubrication, as well as examines the coating surface before and after tribological testing. As a result, it is possible to determine whether the surface undergoes self-organization during friction. Coatings were produced by hardfacing a subeutectic alloy Fe-Mn-C-B modified by silicon, nickel, chromium and copper. Tribological tests were performed using a pin-on-disc tribometer. The pin (coating) and the disc made of steel C45 were subjected to heat treatment (hardening and tempering). The tests were carried out under loads of 3 MPa, 7 MPa and 10 MPa at a constant sliding velocity of 0.4 m/s and a sliding distance of 5700 m using a surface-active lubricant (glycerine oil). Obtained results were compared with the published results of previous tests carried out under the same conditions but under a load of 20 MPa. Obtained microscopic and spectroscopic results demonstrate that that the friction pair materials (the coating made of subeutectic alloy Fe-Mn-C-B modified by Si, Ni, Cr, Cu and C45 steel) and the surface-active lubricant cause self-organization during friction. The friction surface of the coatings has a flay-laminar structure and is covered with triboreaction products. The surface shows the presence of wear-resistant compounds such as oxides, carbides, borides and nitrides.

scholarly journals Self-Organization of Friction Surface of Fe-Mn-C-B Coating With Increased Resistance to Abrasion / Samoorganizacja Powierzchni Tarcia Powłoki Fe-Mn-C-B O Zwiększonej Odporności Na Zużycie Ścierne

2015 ◽  
Vol 60 (4) ◽  
pp. 2651-2656 ◽  
Author(s):  
M. Barszcz ◽  
M. Paszeczko ◽  
K. Lenik
Keyword(s):  
Arc Welding ◽  
Friction Surface ◽  
Sliding Friction ◽  
Friction Pair ◽  
Alloy Coating ◽  
Self Organization ◽  
Hypoeutectic Alloy ◽  
Cored Wire ◽  
Pin On Disc ◽  
Surface Active

The paper concerns the research on self-organization of the surface of coating of hypoeutectic alloy Fe-Mn-C-B modified Si, Ni, Cr, Cu with friction with C45 steel. The coatings were obtained by arc welding using a flux-cored wire. Tests of resistance to wear were carried out for hypoeutectic coatings with use of the friction pair pin-on-disc in the conditions of sliding friction, in model lubricating environments. The surface-active (glycerol oil) and inactive (Vaseline grease) lubricant was used. Tribological tests carried out showed that cooperation of hypoeutectic alloy coating with counterbody of C45 steel with lubrication with surface-active lubricant results in a significant improvement in tribological properties than in case of the lubrication with surface-inactive lubricant. The resulting effect is related to the self-organization of friction surface. After deposition and wear resistance tests, the friction surface microstructure was analysed, as well as the surface and depth distribution of the elements.

scholarly journals Effect of Temperature on the Tribological Properties of Selected Thermoplastic Materials Cooperating with Aluminium Alloy

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7318
Author(s):  
Anita Ptak ◽  
Paula Taciak ◽  
Wojciech Wieleba
Keyword(s):  
Aluminium Alloy ◽  
Contact Pressure ◽  
Tribological Properties ◽  
Polymer Materials ◽  
Effect Of Temperature ◽  
Test Results ◽  
Friction Process ◽  
Before And After ◽  
Pin On Disc ◽  
Two Parameters

This article concerns the tribological properties of three selected polymer materials: polyamide PA6, polyethylene PE-HD and polyetheretherketone composite PEEK/BG during sliding against aluminium alloy EN AW-2017A in the presence of hydraulic oil HLP 68. The tests were carried out under contact pressure p of 3.5–11 MPa at ambient temperature T ranging from −20 °C to +20 °C. The dependence of kinetic friction coefficient μk on the two parameters was determined through tribological tests carried out using a pin-on-disc tribometer. A five-level central composite rotatable design (CCRD) was adopted for the experiment. All the test results were statistically analysed. The microhardness of the surface of the polymeric material was measured before and after the friction process. The surface was also examined under SEM. Temperature and contact pressure have been found to have a significant effect on the tribological properties of the tested sliding pairs. Relative to the applied friction conditions, the surfaces after friction showed rather heavy signs of wear.

Studies on Adhesive Wear Characteristics of Centrifugally Cast Functionally Graded Ceramic Reinforced Composite

2020 ◽  
Vol 17 (4) ◽  
Author(s):  
K. Kartik Sriram ◽  
N. Radhika ◽  
Manu Sam ◽  
Shrihari S
Keyword(s):  
Adhesive Wear ◽  
Centrifugal Casting ◽  
Longitudinal Axis ◽  
Functionally Graded ◽  
Dry Sliding Wear ◽  
Sliding Velocity ◽  
Cross Sectional ◽  
Centrifugally Cast ◽  
Pin On Disc ◽  
Sliding Distance

Functionally graded material containing LM13 aluminium alloy as matrix and alumina as reinforcement (10 wt. %) was fabricated (Φout150 × Φin90 × 100 mm) by centrifugal casting. Samples were machined from the cylindrical cast along its longitudinal axis. Variation in hardness along the radial cross-sectional wall revealed 33.7% improvement at the outer periphery due to higher presence of alumina. This zone was preferred for dry sliding wear experiments, designed based on Taguchi L27 orthogonal array by varying the process parameters like sliding velocity, sliding distance and load using pin-on-disc tribometer. Analysis of variance revealed velocity as most influential wear factor, next to load. An optimal condition to minimise adhesive wear was determined at a load of 15 N, sliding velocity of 3.5 m/s and sliding distance of 1250 m. Scanning electron microscope analysis on abraded surfaces showed formation of tribolayer at high velocities and delamination at high loads.

Effect of Tribological Behaviours on Laser Surface Textured Hard Forged Steel

2020 ◽  
Vol 12 (2) ◽  
Author(s):  
R. Ravichandran ◽  
M. Duraiselvam ◽  
F. Peter Prakash
Keyword(s):  
High Temperature ◽  
Wear Rate ◽  
Applied Load ◽  
Optical Microscope ◽  
Laser Surface ◽  
Sliding Velocity ◽  
Cooling Process ◽  
Pin On Disc ◽  
Sliding Distance ◽  
Minimum Wear

The wear characteristics of untextured and Laser Surface Textured (LST) hard forged steel samples were dissected using a Pin-On-Disc Tribometer. In this analysis, the input parameters such as sliding distance, sliding velocity and applied load were selected as experiment parameters. Before LST, the forged steel was hardened at a high temperature of around 900ºC to 1400ºC followed by a rapid cooling process which causes the iron atoms to change their position with metal lattice as martensite. The characterization was carried out on an optical microscope (OM) and white light interferometer (WLI). The results showed that the LST samples have minimum wear rate of 2.7410-4 to 4.3910-4 mm3/m and co-efficient of friction of 0.22 to 0.44 compared to untextured samples.

Comparative Study of Effect of Cryogenics Heat Treatment and Case Hardening on the Wear Property of 20MnCr5

2015 ◽  
Vol 798 ◽  
pp. 435-439
Author(s):  
S.D. Ambekar ◽  
Sandeep Kadam ◽  
S.A. Sonawane
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Comparative Study ◽  
Abrasive Wear ◽  
Alloy Steel ◽  
Case Hardening ◽  
Wear Property ◽  
Sliding Velocity ◽  
Pin On Disc ◽  
Sliding Distance

This research is limited to study of wear resistance of 20MnCr5 (SAE 5120) alloy steel hardened by Carburizing and Cryogenics, which has wide application in industries like gears, shafts, bearings, pins etc. Cryogenics is used as a supplement treatment that is performed after carburizing. The abrasive wear study is performed on pin-on-disc tribotester. The counterface disc was kept same for both the heat treatments (carburizing and cryogenics). Sliding velocity of 0.8 m/s, 1.6 m/s, 2.4 m/s, Sliding Distance of 1200 m, 1400 m, 1600 m and Load of 3 kg, 4 kg and 5 kg were used to evaluate the wear resistance.

Friction Coefficient Model of Friction Pair Composed of Automotive Brake Materials

2014 ◽  
Author(s):  
Zhishuai Wan ◽  
Xiandong Liu ◽  
Haixia Wang ◽  
Yingchun Shan ◽  
Tian He
Keyword(s):  
Friction Coefficient ◽  
Friction Pair ◽  
Testing Machine ◽  
Friction Material ◽  
Sliding Velocity ◽  
Brake Pressure ◽  
Pin On Disc ◽  
Model Of Friction ◽  
Semi Empirical ◽  
Material Testing Machine

The friction experiments are conducted on a pin-on-disc friction material testing machine. The sliding velocity, pressure, temperature and friction coefficient are measured. The effects of brake temperature, brake pressure and braking speed on the friction coefficient are examined. Based on energy conservation theory, the model of friction coefficient is established using statistical methods. Then a semi-empirical model of friction coefficient is established by regression analysis methods. And the effects of the temperature, brake pressure, the relative sliding velocity and these cross-terms on the friction coefficient are also discussed.

scholarly journals Wear analysis of natural-inorganic fiber reinforced automotive brake composites

2021 ◽  
pp. 36-44
Author(s):  
Tej Singh ◽  
Gusztáv Fekete
Keyword(s):  
Sliding Wear ◽  
Normal Load ◽  
Sliding Velocity ◽  
Wear Properties ◽  
Banana Fiber ◽  
Wear Performance ◽  
Significant Control ◽  
Pin On Disc ◽  
Four Levels ◽  
Sliding Distance

Brake friction composite materials comprising varying proportions of natural (banana) and inorganic (lapinus) fibers were designed, fabricated by compression molding, and characterized for sliding wear performance. The sliding wear properties of the manufactured friction composites have been studied by the Taguchi method. An orthogonal array (L 16) was used to investigate the influence of sliding wear parameters. A series of tests were conducted on a pin-on-disc machine by considering four control parameters: composition, normal load, sliding velocity, and sliding distance, each having four levels. The results showed that the wear in terms of weight loss decreases with increasing banana fiber and increases with increasing lapinus fiber, normal load, sliding velocity, and sliding distance. The results indicate that the normal load emerges as the most significant control parameter affecting wear performance, followed by sliding distance and sliding velocity.

Experimental Investigation on Friction and Wear Performance of C/C Composite Finger Seal

2021 ◽  
Vol 144 (2) ◽  
Author(s):  
Zhang Yan-chao ◽  
Zhou Rui-min ◽  
Yin Ming-hu ◽  
Zhang Yong-tao ◽  
Hu Hai-tao ◽  
...  
Keyword(s):  
Performance Test ◽  
Base Alloy ◽  
Friction Pair ◽  
Good Choice ◽  
Wear Loss ◽  
Test Results ◽  
Durability Test ◽  
Friction Characteristics ◽  
Before And After ◽  
Pin On Disc

Abstract In order to find a good friction pair for the finger seal, the pin-on-disc friction tests matching the actual working conditions of finger seal are designed based on the performance simulation of finger seal and the similarity principle of PV value, in which the friction characteristics between pins with two different materials (C/C composite or cobalt-base alloy GH605) and discs with two different coatings (Cr3C2 or Al2O3) are tested and analyzed respectively; the test results show that the wear loss of all the friction pairs increases with the load increasing, but the friction coefficient of the C/C composite pin (no matter contacting with Cr3C2 or Al2O3 coating) is much less than that of GH605 pin; in the four kinds of friction pairs, the C/C–Cr3C2 pair has the greatest friction characteristics and least wear loss. Then, to verify the application feasibility of C/C composite in the finger seal further, the bench-scale performance test of the finger seal with C/C–Cr3C2 pair (the finger seal is made of C/C composite, and the rotor surface is coated with Cr3C2) is carried out with a self-developed testing rig; according to the leakage and wear results before and after the durability test lasted for 60 h, there is little distinct trace of destruction on the friction surfaces of finger seal with C/C–Cr3C2 pair after the durability test, which is in good agreement with the result of pin-on-disc friction test; besides, after the durability test, the static leakage of finger seal with C/C–Cr3C2 pair becomes lower than that before and is lower than that of finger seal made of GH605. The test results in this paper indicates that the C/C–Cr3C2 pair has nice friction characteristics and can be a good choice for the friction pair of the finger seal.

Effect of Reinforcement and Tribological Behaviour of AA 7068 Hybrid Composites Manufactured through Powder Metallurgy Techniques

2017 ◽  
Vol 867 ◽  
pp. 19-28 ◽  
Author(s):  
J. Lakshmipathy ◽  
Subburaj Rajesh Kannan ◽  
K. Manisekar ◽  
S. Vinoth Kumar
Keyword(s):  
Sintering Temperature ◽  
Hybrid Composites ◽  
High Strength ◽  
Phase Changes ◽  
Wear Loss ◽  
X Ray Diffraction ◽  
Tribological Behaviour ◽  
Different Temperatures ◽  
Pin On Disc ◽  
Sliding Distance

In this article, an attempt was made to study the mechanical behaviour of AA7068 - 6 vol. % of MoS2 - X vol. % of WC (X = 0, 5, 10 and 15) hybrid aluminium composites produced by blend–press–sinter methodology. Compacted Powders (700MPa) were sintered at different temperatures (450 0c, 500 0c and 550 0c ) in order to find the influence of sintering temperature on mechanical properties and tribological behavior of AA7068 hybrid composites.The sintered samples have been characterized by x-ray diffraction (XRD) method for identification of phases and also to investigate the phase changes. The change in density, hardness and porosity values of composites were reported. The composite with 15 vol. % of tungsten carbide and 6 vol. % of MoS2 showed the highest hardness and density at the sintering temperature range of 550 0c. Pin-on-disc type apparatus was used for determining the wear loss occurring at different conditions. The hybridization of the two reinforcements enhanced the wear resistance of the composites, especially under high applied load, sliding distance and sliding speeds. Due to this, the hybrid aluminium composites can be considered as an outstanding material where high strength and wear-resistant components are of major importance, predominantly in the aerospace and automotive engineering sectors. The morphology of the wear debris and the worn out surfaces were analyzed to understand the wear mechanisms.

scholarly journals Evaluation of Marginal Misfit of Metal Frameworks Welded by Gas-Torch, Laser, and Tungsten Inert Gas Methods

2018 ◽  
Vol 2018 ◽  
pp. 1-6
Author(s):  
Wilson Matsumoto ◽  
Paula Pastana Beraldo ◽  
Rossana Pereira de Almeida ◽  
Ana Paula Macedo ◽  
Beatriz Roque Kubata ◽  
...  
Keyword(s):  
Inert Gas ◽  
Marginal Fit ◽  
Nickel Chromium ◽  
Before And After ◽  
Master Model ◽  
The One ◽  
Flexural Resistance ◽  
One Way Anova ◽  
Silicone Matrix ◽  
And Tungsten

Purpose. The objective of this study was to evaluate the marginal fit and the flexural resistance of nickel-chromium frameworks welded by different techniques, gas-torch, laser, and tungsten inert gas (TIG), compared with that of frameworks made via one-piece casting. Methods. To evaluate the marginal fit, a master model was fabricated simulating four implants. Transfers and replicas were used to transfer the positions of the implants to the model, using a silicone matrix. The bars were waxed up and casted. Three assessments of misfit were performed for each implant using a stereomicroscope before and after welding in two predetermined regions, totaling six readings for each implant. To evaluate the flexural resistance, one group was made casting the specimens in one piece. Other 3 groups using gas-torch, laser, and TIG welding techniques were made after sectioned transversally. The data showed normal distribution and two-way ANOVA for marginal fit and one-way ANOVA for flexural resistance, and Tukey’s posttest (α=0.05) was performed. Results. For the marginal fit, the three welding methods presented similar results and were different from one-piece casting. For the flexural resistance, significant differences were observed among the studied groups (p<0.001), and the one-piece group presented higher resistance compared to the three welding techniques. Conclusions. Within the limits of this study, the three welding techniques yielded similar misfit results, and the laser and TIG techniques presented similar flexural resistance but lower than gas-torch and one-piece casting.

Sign in / Sign up

Export Citation Format

Share Document