Effects of SiO2 Particles on Wear Behavior of Cu-SiO2 Dispersion-Hardened Alloys

2007 ◽  
Vol 561-565 ◽  
pp. 659-662 ◽  
Author(s):  
Hisashi Sato ◽  
Yoshimi Watanabe
Keyword(s):  
Volume Fraction ◽  
Wear Behavior ◽  
Solid Particles ◽  
Wear Property ◽  
Wear Process ◽  
Hardened Alloy ◽  
Pin On Disc ◽  
Sio2 Particles ◽  
Worn Surface ◽  
Sliding Distance

Effects of solid particles on wear behavior of dispersion-hardened alloy were investigated using Cu-SiO2 alloys containing 0.6vol.%SiO2, 1.2vol.%SiO2 and 1.7vol.%SiO2 particles. Wear tests were made using pin-on-disc type wear machine. Wear property of the Cu-SiO2 alloys is improved by increasing volume fraction of SiO2 particles. Moreover, wear amounts of Cu-SiO2 alloys increase with increasing the sliding distance, and then are saturated at exceeding about 1km. This is why that SiO2 particle improves the strength of Cu-SiO2 alloy, and that the work hardening occurs on worn surface. Wear-induced layer is formed just below worn surface by severe plastic deformation due to wear, and its hardness increases as the volume fraction of SiO2 particles increases. From these obtained results, wear process of Cu-SiO2 alloy was discussed.

Wear Behavior of ZrO2-CNF and Si3N4-CNT Nanocomposites

2011 ◽  
Vol 465 ◽  
pp. 495-498 ◽  
Author(s):  
Pavol Hvizdoš ◽  
Annamária Duszová ◽  
Viktor Puchý ◽  
Orsolya Tapasztó ◽  
Peter Kun ◽  
...  
Keyword(s):  
Volume Fraction ◽  
Tribological Behavior ◽  
Wear Behavior ◽  
Carbon Nanofibres ◽  
Wear Rates ◽  
Pull Out ◽  
Pin On Disc ◽  
Material Volume ◽  
Wear Damage ◽  
Sliding Distance

Tribological behavior of ZrO2 and Si3N4 based nanocomposites with addition of carbon nanofibres and nanotubes has been studied by the pin-on-disc technique. Friction coefficients were measured and recorded, wear rates were calculated in terms of material volume loss per load and sliding distance. The wear damage was studied using optical and electron microscopy and its mechanisms were identified. In monolithic materials the dominant wear mechanism was abrasion, in composites with CNF and with higher volume fraction of CNTs (5 and 10%) fiber pull-out and lubricating by the carbon phases occurred.

Tribological Behavior of Cenosphere-Filled Epoxy Syntactic Foams in Dry Sliding Conditions

2020 ◽  
Vol 142 (5) ◽  
Author(s):  
Ch. Sri Chaitanya ◽  
R. Narasimha Rao
Keyword(s):  
Wear Debris ◽  
Volume Fraction ◽  
Tribological Behavior ◽  
Applied Pressure ◽  
Tribological Performance ◽  
Syntactic Foams ◽  
Pin On Disc ◽  
Surface Examination ◽  
Worn Surface ◽  
Sliding Distance

Abstract The tribological behavior of the 10%, 20%, 30%, and 40% cenosphere-filled epoxy syntactic foams in terms of the wear rate and the friction coefficient of the foams were reported using a pin on disc tribometer in the present study. The influence of the wear parameters like applied pressure, sliding speed, and the sliding distance on the tribological performance of syntactic foams was reported. Syntactic foams with 40% cenosphere volume fraction exhibit better tribological properties over the other syntactic foams. The worn surface examination shows the adhesive dominant wear mechanism and the wear debris with broken cenosphere particles.

Multi-response optimization of tribological characteristics of aluminum MMCs using PCA

2014 ◽  
Vol 10 (2) ◽  
pp. 276-287
Author(s):  
Rajesh Siriyala ◽  
A. Gopala Krishna ◽  
P. Rama Murthy Raju ◽  
M. Duraiselvam
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Principal Component ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Sliding Velocity ◽  
Content Type ◽  
Wear Process ◽  
Response Optimization ◽  
Sliding Distance

Purpose – Since, wear is the one of the most commonly encountered industrial problems leading to frequent replacement of components there is a need to develop metal matrix composites (MMCs) for achieving better wear properties. The purpose of this paper is to fabricate aluminum MMCs to improve the dry sliding wear characteristics. An effective multi-response optimization approach called the principal component analysis (PCA) was used to identify the sets of optimal parameters in dry sliding wear process. Design/methodology/approach – The present work investigates the dry sliding wear behavior of graphite reinforced aluminum composites produced by the molten metal mixing method by means of a pin-on-disc type wear set up. Dry sliding wear tests were carried on graphite reinforced MMCs and its matrix alloy sliding against a steel counter face. Different contact stress, reinforcement percentage, sliding distance and sliding velocity were selected as the control variables and the response selected was wear volume loss (WVL) and coefficient of friction (COF) to evaluate the dry sliding performance. An L25 orthogonal array was employed for the experimental design. Optimization of dry sliding performance of the graphite reinforced MMCs was performed using PCA. Findings – Based on the PCA, the optimum level parameters for overall principal component (PC) of WVL and COF have been identified. Moreover, analysis of variance was performed to know the impact of individual factors on overall PC of WVL and COF. The results indicated that the reinforcement percentage was found to be most effective factor among the other control parameters on dry sliding wear followed by sliding distance, sliding velocity and contact stress. Finally the wear surface morphology of the composites has been investigated using scanning electron microscopy. Practical implications – Various manufacturing techniques are available for processing of MMCs. Each technique has its own advantages and disadvantages. In particular, some techniques are significantly expensive compared to others. Generally the manufacturer prefers the low cost technique. Therefore stir casting technique which was used in this paper for manufacturing of Aluminum MMCs is the best alternative for processing of MMCs in the present commercial sectors. Since the most important criteria of a dry sliding wear behavior is to provide lower WVL and COF, this study has intended to prove the application of PCA technique for solving multi objective optimization problem in wear applications like piston rings, piston rods, cylinder heads and brake rotors, etc. Originality/value – Application of multi-response optimization technique for evaluation of tribological characteristics for Aluminum MMCs made up of graphite particulates is a first-of-its-kind approach in literature. Hence PCA method can be successfully used for multi-response optimization of dry sliding wear process.

scholarly journals Influence of micro- and nanofiller contents on friction and wear behavior of epoxy composites

2017 ◽  
Vol 24 (4) ◽  
pp. 485-494 ◽  
Author(s):  
Iskender Ozsoy ◽  
Adullah Mimaroglu ◽  
Huseyin Unal
Keyword(s):  
Fly Ash ◽  
Friction And Wear ◽  
Filler Content ◽  
Wear Behavior ◽  
Tribological Performance ◽  
Epoxy Composites ◽  
Atmospheric Conditions ◽  
Wear Rates ◽  
Pin On Disc ◽  
Worn Surface

AbstractIn this study, the influence of micro- and nanofiller contents on the tribological performance of epoxy composites was studied. The fillers are micro-Al2O3, micro-TiO2, and micro-fly ash and nano-Al2O3, nano-TiO2, and nanoclay fillers. The microfillers were added to the epoxy by 10%, 20%, and 30% by weight. The nanofillers were added to the epoxy by 2.5%, 5%, and 10%. Friction and wear tests were conducted using the pin-on-disc arrangement. Tribo elements consisted of polymer pin and DIN 1.2344 steel counterface disc. A load value of 15 N, a sliding speed of 0.4 m/s, a sliding distance of 2000 m, and dry atmospheric conditions were applied to test conditions. The results show that the friction coefficients and the specific wear rates of the nanofilled composites increase as the filler content increases. For microfiller-filled epoxy composites, these values decrease as filler content increases. The tribological performance of epoxy composites is enhanced by the addition of microfillers, and the higher enhancement is reached with the addition of 30% fly ash filler. Finally, the pin and disc worn surface images show the presence of adhesive and some abrasive wear mechanisms.

Friction and Wear Behavior of 9SiCr Steel under Different Treatment with Plant Abrasive

2012 ◽  
Vol 562-564 ◽  
pp. 318-321 ◽  
Author(s):  
Xiao Peng Huang ◽  
Jing Feng Wu ◽  
Fang Xin Wan ◽  
Ke Ping Zhang
Keyword(s):  
Wear Resistance ◽  
Wear Behavior ◽  
Fatigue Wear ◽  
Wear Rates ◽  
Laser Quenching ◽  
Wear Damage ◽  
Worn Surface ◽  
Sliding Distance ◽  
Wear Tests ◽  
Temperature Sample

In this study, the wear behavior of 9SiCr steel under different treatment with plant abrasive was evaluated by using an abrasive rubber wheel tester. The samples’ microstructures were analyzed by a metallurgical microscope, the samples’ worn surface morphology was observed by using SEM.The results show that: With the increasing of hardness of sample, Its wear resistance is greatly improved. Hardness of laser quenching sample is the highest, wear resistance of it is the best, the second is sub temperature sample. The wear rates and the wear coefficients are proportional to the sliding distance. The Laser quenching samplel display a consistent behaviour with a very low wear rate and a small increase of the wear damage is observed during the abrasive wear tests. The worn surfaces of the three kind samples are characterized by the micro-cutting wear, and no treatment sample is accompanied by fatigue wear mechanism.

Study of Wear Properties of In Situ TiB/TiC Reinforced Ti1100 Composites

2013 ◽  
Vol 550 ◽  
pp. 107-113
Author(s):  
Xiao Lu Gong ◽  
Fei Zhao ◽  
Di Zhang
Keyword(s):  
Shear Stress ◽  
Wear Debris ◽  
Matrix Alloy ◽  
Stress Distributions ◽  
Wear Properties ◽  
Wear Process ◽  
The Matrix ◽  
Pin On Disc ◽  
Worn Surface

The tribological performances of in-situ (TiB + TiC) / Ti1100 composites prepared by casting and the matrix alloy were tested by pin-on disc mode. The worn surface and wear debris were investigated by SEM. The models of the composites during the wear process were simulated by ABAQUS FEA software. The analysis shows the stress distributions inside the composites under the different shear stress. The wear mechanism of the composites is probed.

Microstructure and Wear Performance of Cu-Mo-Si Alloys Fabricated by Self-Propagation High-Temperature Synthesis

2010 ◽  
Vol 658 ◽  
pp. 408-411
Author(s):  
Hui Xie ◽  
Lei Jia ◽  
Si Ming Wang ◽  
Ji Ling Zhu ◽  
Zhen Lin Lu
Keyword(s):  
High Temperature ◽  
Wear Behavior ◽  
X Ray Diffraction ◽  
Temperature Synthesis ◽  
Wear Performance ◽  
X Ray ◽  
Cu Content ◽  
High Temperature Synthesis ◽  
Pin On Disc ◽  
Worn Surface

Cu-Mo-Si alloys with different Cu contents were prepared by self-propagation high-temperature synthesis (SHS). The microstructure and the worn surface morphology were observed using scanning electron microscopy (SEM) together with energy dispersive X-ray spectroscopy (EDS) analysis. Phase composition was determined by X-ray diffraction (XRD). The wear behavior of the Cu-Mo-Si alloys was characterized by pin-on-disc wear tester. The results showed that most of Si atoms dissolved in Cu matrix or resulted in formation of compound with Cu, while only small amount of Si atoms reacted with Mo atoms to form Mo5Si3 particles in the Cu-Ni-Si alloys with 80% Cu content. The wear rate of Cu-Mo-Si alloys descended with a decrease of Cu content, and the predominant wear mechanism could be identified as abrasive wear for Cu content less than 90% and plastic deformation for Cu content higher than 90%.

scholarly journals Al/Graphene/CNT hybrid composites: Hardness and sliding wear studies

2021 ◽  
Vol 49 (2) ◽  
pp. 414-421
Author(s):  
Manjunath Naik ◽  
L.H. Manjunath ◽  
Vishwanath Koti ◽  
Avinash Lakshmikanthan ◽  
Praveennath Koppad ◽  
...  
Keyword(s):  
Wear Rate ◽  
Sliding Wear ◽  
Hybrid Composites ◽  
Wear Behavior ◽  
Lubricating Layer ◽  
Wear And Friction ◽  
Bulk Hardness ◽  
Graphene Content ◽  
Worn Surface ◽  
Sliding Distance

Graphene and carbon nanotubes are two carbon based materials known for their unique wear and friction properties. It would be quite interesting to understand the wear behavior of aluminium hybrid composites when these two nanosize reinforcements are incorporated into it. The hybrid composites with varying weight fractions of graphene (1, 2, 3 and 5 wt.%) and fixed CNT content of 2 wt.% were produced using powder metallurgy technique. The effect of varying graphene content on hardness and sliding wear of hybrid composites was studied. The wear tests were done as per ASTM G-99 standard with fixed sliding velocity (2 m/s) and sliding distance (1200 m) but varying applied load (10 - 30 N). Worn surface analysis was conducted using scanning electron microscope to arrive at wear mechanisms responsible for wear of aluminium and its hybrid composites. Increase in graphene content led to increase in bulk hardness with highest value of 61 RHN for hybrid composite with 3 wt.% graphene content. The wear rate of hybrid composites was found to be decreasing with enhancement in graphene content. Lower wear rate in hybrid composites was due to the formation of lubricating layer on the worn surface.

scholarly journals Optimization of Wear Process Parameters on 17-Cr Ferritic ODS Steel

2019 ◽  
Vol 9 (2) ◽  
pp. 1828-1836
Keyword(s):  
Wear Rate ◽  
Process Parameters ◽  
Wear Behavior ◽  
Oxide Dispersion Strengthened ◽  
Oxide Dispersion ◽  
Sliding Velocity ◽  
Oxide Dispersion Strengthened Steel ◽  
Wear Process ◽  
Ods Steel ◽  
Sliding Distance

The main aim of this article deals with the wear behavior of mechanically alloyed 17-Cr oxide dispersion strengthened (ODS) Ferritic steel consolidated through Vacuum Hot Pressing (VHP) at temperature level of 1170 °C under pressure level of 60 MPa with 60 minutes as holding time and with rate of cooling of 50 ˚C /min and a vacuum level of 10-3 torr. The persuade of wear process parameters were investigated based on the load applied, sliding velocity and sliding distance at a temperature of 350°C on dry sliding track of 17-Cr Ferritic oxide dispersion strengthened steel (Fe-17Cr-0.35Y2O3 -1.5ZrO2 -4Al (%wt). Wear test was conducted in a dry atmosphere using a pinon-disc wear testing machine. Wear behavior of 17-Cr Ferritic ODS steel was analyzed by using Taguchi approach. To examine the process parameter during high temperature wear rate analysis of variance and signal to noise ratios were used. During the wear analysis sliding distance was found to be influential parameters of wear rate for 17-Cr Ferritic oxide dispersion strengthened steel succeeded by functional load and sliding velocity. The regression model was found to calculate the rate of wear for 17-Cr Ferritic oxide dispersion strengthened steel.

Influence of WC Content on Microstructure and Wear Resistance of (Cu-50Mo)-WC Composites

2014 ◽  
Vol 1052 ◽  
pp. 115-119
Author(s):  
Xin Le Cheng ◽  
Bao Hong Tian
Keyword(s):  
Wear Resistance ◽  
Spark Plasma Sintering ◽  
Wear Mechanism ◽  
Wear Behavior ◽  
Comprehensive Properties ◽  
Plasma Sintering ◽  
Pin On Disc ◽  
Spark Plasma ◽  
Surface Morphologies ◽  
Worn Surface

By using a SPS-30 spark plasma sintering pressing sintering furnace, the Cu-50Mo-WC composites were prepared with four different WC content by spark plasma sintering method (SPS). The wear behavior of the Cu-50Mo-WC composite pin against the QCr0. 5 bronze disc was examined on a pin-on-disc tribotester. The worn surface morphologies of the composite were observed by a scanning electron microscope (SEM). The wear mechanism was investigated briefly.The results show that the WC particles improve the hardness and wear resistance of the composites. The main wear mechanism of the composites is of adhesive wear and abrasive wear. When addition of 1% WC content, the optimal comprehensive properties of the composite is obtained.

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