scholarly journals Wear and Residual Stress Analysis of Waste Sea Shell and B4C Particles Reinforced Green Hybrid Aluminium Metal Composite

2021 ◽  
Author(s):  
Vipin Kumar Sharma ◽  
◽  
Sri Kant Rana ◽  
Roop Lal ◽  
Ramakant Rana ◽  
...  
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Wear Behavior ◽  
Stir Casting ◽  
Metal Composite ◽  
Friction Behavior ◽  
Wear And Friction ◽  
B4c Particles ◽  
B4c Powder ◽  
Aluminium Metal

Present work, evaluates the effects of Sea shell and B4C powder on the mechanical behavior of the aluminium material (Al 6082). Stir casting method was used to fabricate a hybrid composite of Al 6082 with sea shell and B4C. A linear reciprocating tribometer was used to evaluate the wear and friction behavior. The addition of sea shell and B4C particles, resulted in 7-13 % reduction in coefficient of friction and 32-43 % improvement in wear resistance as compared to the Al 6082 alloy. The average Vicker hardness was also improved by 20-70 %. The residual stresses developed during the mechanical testing were also measured to inspect the generation of residual stresses in the fabricated composite. Optical micrographs and scanning electron microscope (SEM) were obtained to analyze the prepared composites for the wear behavior. Waste sea shells were reinforced with B4C in Al 6082 alloys. Microhardness along with microstructure and residual stress of the developed green hybrid aluminium metal composite are compared and presented. The wear and friction data have also been shown in this paper for the use of green hybrid aluminium composite in tribological applications.

Dry Sliding Wear Behavior of A356-ZrO2 Metal Matrix Composite

2015 ◽  
Vol 1125 ◽  
pp. 116-120
Author(s):  
Hamidreza Ghandvar ◽  
Saeed Farahany ◽  
Mohd Hasbullah Idris ◽  
Mohammadreza Daroonparvar
Keyword(s):  
Metal Matrix ◽  
Sliding Wear ◽  
Adhesive Wear ◽  
Wear Behavior ◽  
A356 Alloy ◽  
Matrix Alloy ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Friction Behavior ◽  
Wear And Friction

Dry sliding wear and friction behavior of cast A356 Al-Si alloy and composite containing 5wt. % ZrO2 particles were studied by means of a pins-on-disk apparatus over loads of 5N, 20N and a sliding speed of 0.628m/s. The experimental results showed that the composites exhibited a higher wear resistance in comparison to that of the unreinforced A356 alloy. The friction coefficient of tested materials increased with increasing applied load from 5 to 20 N. FESEM investigations revealed that the wear mechanism of the A356 matrix alloy changed from sever abrasive, adhesive wear into mild abrasion and adhesive wear with addition of 5wt. % ZrO2 reinforcement particles.

Friction and wear behavior of a PMMA-SiO2 coating on hardened steel

2014 ◽  
Vol 1613 ◽  
pp. 109-114
Author(s):  
Luis E. Torres-Parga ◽  
Carolina Hernández-Navarro ◽  
Karla J. Moreno-Bello ◽  
J.S. García-Miranda ◽  
Luis D. Aguilera-Camacho ◽  
...  
Keyword(s):  
Wear Behavior ◽  
Sol Gel ◽  
Dip Coating ◽  
Hardened Steel ◽  
Protective Film ◽  
Friction Behavior ◽  
A Value ◽  
Wear And Friction ◽  
Dry Conditions ◽  
Steel Substrates

ABSTRACTSol-gel coatings show an excellent chemical stability, oxidation control and enhanced corrosion resistance for metal substrates. An organic-inorganic hybrid consisting of poly (methyl methacrylate) (PMMA) and silica (SiO2) was successfully synthesized in the form of solution, by using 3-(trimethoxysilyl) propyl methacrylate (TMSPM) as a coupling agent and cohydrolyzed with tetraethyl orthosilicate (TEOS) to afford chemical bondings to the forming silica networks by a sol-gel method. The as-synthesized hybrid material was subsequently characterized by Fourier Transformation infrared (FTIR) spectroscopy. PMMA-SiO2 was applied as a protective film on hardness steel substrates by dip-coating. The thickness of the coating was 25 µm, while the roughness Ra = 0.6 µm. The wear and friction behavior of the coating on hardened steel (HS) was evaluated by a ball-on-disk test in dry conditions with a AISI steel ball as counterface applying 2, 4, 6, 8 and 10 N normal loads. Friction coefficient values (µk) were in the range of 0.76 to 0.99, whereas the lowest wear rate (k) was observed at 6N with a value of 1.30x10-4 (mm3(Nm)-1).

scholarly journals A Comprehensive Study about the Role of Crosslink Density on the Tribological Behavior of DLC Coated Rubber

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5460
Author(s):  
Suleyman Bayrak ◽  
Dominik Paulkowski ◽  
Klaus Werner Stöckelhuber ◽  
Benjamin Staar ◽  
Bernd Mayer
Keyword(s):  
Crosslink Density ◽  
Wear Behavior ◽  
Substrate Material ◽  
Butadiene Rubber ◽  
Friction Behavior ◽  
Functional Layer ◽  
Wear And Friction ◽  
Substrate Properties ◽  
The Impact

The friction and wear behavior of coated rubber components is strongly dependent on the substrate properties. This work deals with the impact of the crosslink density, i.e., the hardness of the rubber substrate on the tribological performance of uncoated and coated rubber. The hardness of nitrile butadiene rubber (NBR) is varied altering the sulfur content. Both the uncoated and coated rubber samples are characterized in terms of surface and mechanical properties. Tribological tests comprise the examination of the macroscopic contact area and the temperature in the contact zone. It was found that the functional layer enhances the wear resistance significantly. Apparently, the wear and friction behavior of the coated rubber correlates with the hardness and the bulk properties of the substrate material.

Effect of crystal size on the tribological behavior of manganese phosphate coatings under lubricated sliding

2017 ◽  
Vol 232 (10) ◽  
pp. 1285-1292
Author(s):  
Nicolás S Fochesatto ◽  
Camila Müller ◽  
Nicolás A Zabala ◽  
Pablo A Castro ◽  
Walter R Tuckart
Keyword(s):  
Crystal Size ◽  
Wear Behavior ◽  
Activator Concentration ◽  
Friction Behavior ◽  
Manganese Phosphate ◽  
Phosphate Coatings ◽  
Wear And Friction ◽  
Optical Profilometer ◽  
Sliding Distance ◽  
Wear Tests

In this study, the wear and friction behavior of manganese phosphate coatings with different crystal sizes were investigated. Crystal size was controlled modifying the chemical composition of the phosphating bath, particularly the concentration of the activator which modifies the number of nuclei for crystal growth. Activator concentration range used for this work varied from 0 to 0.7 g/L, and crystal size was measured using image analysis software on scanning electron microscopy photographs. Available volume for lubricant retention was determined measuring the phosphated surface with a 3D optical profilometer. At the same time, lubricated wear tests were carried out using a ring-on-block configuration at low speeds (23 mm/s) and high loads (14,500 N). Wear behavior was determined as the sliding distance to failure, which was noticed through signs of removal of the phosphate along with the increase of coefficient of friction. It was found that there is a competition between the availability of volume to hold the lubricant, which increases with the crystal size, and the surface coverage, which diminishes as the crystal size grows. Optimal results were obtained for an activator concentration of 0.3 g/L, which meant an average crystal size of 16 µm.

Abrasive wear behavior of Al-TiB2 and Al-TiB2-nano-graphite metal matrix composites

2021 ◽  
pp. 146442072199158
Author(s):  
Suswagata Poria ◽  
Goutam Sutradhar ◽  
Prasanta Sahoo
Keyword(s):  
Abrasive Wear ◽  
Fixed Effects ◽  
Wear Behavior ◽  
Base Alloy ◽  
Operating Conditions ◽  
Grit Size ◽  
Friction Behavior ◽  
Uniform Dispersion ◽  
Wear And Friction ◽  
Abrasive Wear Behavior

This paper deals with abrasive wear behavior of two different composite materials namely Al-TiB2 and Al-TiB2-nano-graphite. At the time of fabrication, ultrasonic vibration is used along with mechanical stirrer to obtain uniform dispersion of micro (TiB2) and nano (graphite) reinforcement phase. Uniform dispersion is confirmed through SEM images of cast composites. Micro-hardness values are obtained for composites and base alloy. Wear tests under two-body abrasion are performed by a tribological test apparatus where composite pins are being rubbed against a disc holding different grades of SiC abrasives: 240 grit, 320 grit and 400 grit. Operating load is varied between 10N and 30N while sliding speed and duration of sliding are kept fixed. Effects of load, reinforcing phase content and abrasive grit size on abrasive wear and friction behavior have been evaluated. Al-TiB2 composites demonstrate higher wear resistance and better friction behavior in comparison with base alloy under all operating conditions. Addition of nano-graphite phase contributes in achieving better abrasive wear and friction performance of Al-TiB2 composites. With increase in grit size, wear reduces for composites and base alloy while wear increases with load. Worn surfaces of samples and emery papers are studied using SEM micrographs and EDX maps. Wear debris at different operating conditions are studied also using SEM and EDX. Operative wear mechanisms are identified from the experimental results.

scholarly journals Towards the Enhanced Mechanical and Tribological Properties and Microstructural Characteristics of B4C Particles Reinforced Aluminium Composites: A Short Overview

2021 ◽  
Author(s):  
V. V. Monikandan ◽  
K. Pratheesh ◽  
P. K. Rajendrakumar ◽  
M. A. Joseph
Keyword(s):  
Tribological Behavior ◽  
Wear Behavior ◽  
Stir Casting ◽  
Physical Parameters ◽  
Matrix Composites ◽  
Microstructural Characteristics ◽  
Mechanical And Tribological Properties ◽  
Wide Range ◽  
B4c Particles ◽  
Aluminum Metal Matrix Composites

This paper overviews the fabrication, microstructural characteristics, mechanical properties, and tribological behavior of B4C reinforced aluminum metal matrix composites (AMMCs). The stir casting procedure and parameters used to fabricate the Al-B4C composites are discussed. The influence of physical parameters such as applied load, sliding speed, and sliding distance on tribological behavior is analyzed. The role of the mechanically mixed layer (MML) and wear mechanisms on the wear behavior and friction coefficient are emphasized. The overview of tribological behavior revealed that the Al-B4C composites possess excellent abrasion resistance and the ability to operate over a wide range of physical parameters. The Al-B4C composites exhibited better tribological behavior when compared with the composites reinforced with conventional reinforcement particles (SiC).

scholarly journals Wear and Friction Behavior of Gr/Sn Solid Lubricated Dual Reinforced AMCs

2021 ◽  
Author(s):  
Varun Singhal ◽  
Om Prakash Pandey
Keyword(s):  
Wear Rate ◽  
Solid Lubricant ◽  
Stir Casting ◽  
Sem Analysis ◽  
Friction Behavior ◽  
Casting Technique ◽  
Aluminum Metal ◽  
Aluminum Metal Matrix Composite ◽  
Wear And Friction ◽  
The Matrix

Abstract The current work has been undertaken to see the effect of Gr/Sn as a solid lubricant for the development of hybrid aluminum metal matrix composite (HAMCs). HAMCs were fabricated by reinforcing 10 wt. % (sillimanite + ilmenite) minerals with or without 1 wt. % Sn/Gr/both solid via stir casting technique. Optical microscopy revealed a homogenous distribution of reinforced particles with the refinement of silicon. Vicker hardness of the HAMCs showed a good interfacial bonding of particles with the matrix. The wear rate and coefficient of friction of the HAMCs are reduced with a maximum of composite with tin and graphite as lubrication agents. The composite contained tin and graphite wear rate as lubrication agents were in tune with the cast-iron brake drum used in the automobile industries. Abrasive wear was dominant at low loads and adhesive wear at high load, as confirmed from SEM analysis.

The Unlubricated Sliding Wear Behavior of a Wrought Cobalt-Chromium Alloy Against Monolithic Ceramic Counterfaces

1989 ◽  
Vol 111 (4) ◽  
pp. 668-674 ◽  
Author(s):  
C. V. Cooper ◽  
C. L. Rollend ◽  
D. H. Krouse
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Degradation Mechanism ◽  
Chromium Alloy ◽  
Cobalt Chromium ◽  
Material Degradation ◽  
Friction Behavior ◽  
Solution Treated ◽  
Wear And Friction ◽  
Cobalt Chromium Alloy

The unlubricated sliding wear and friction behavior of a wrought cobalt-chromium alloy against sintered Al2O3, ZrO2-toughened Al2O3, MgO-partially-stabilized ZrO2, and hot-pressed Si3N4 ceramic counterfaces has been investigated. Both untreated (baseline) and surface-borided conditions of alloy 6B disks were investigated. The dominant wear and/or material degradation mechanism for surface-borided alloy 6B was a combination of abrasion and plastic deformation; in addition, adhesive transfer of the cobalt alloy to monolithic Al2O3 counterfaces was a significant wear mechanism for the as-solution-treated alloy 6B disk. For the partially stabilized ZrO2 counterface, the degradation mechanism involved thermal and/or mechanical fatigue processes, resulting in the formation of microcracks in the 6B disks transverse to the sliding direction. This microcracking has been ascribed to the low thermal conductivity of the partially stabilized ZrO2 and the activation of a martensitic, fcc-to-hcp transition with each passing of the ZrO2 ball. For borided alloy 6B against hot-pressed Si3N4, a transition from negligible to severe wear was noted with increasing sliding speeds.

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