scholarly journals Tribological behaviour of microalloyed Cu50Zr50 alloy

2021 ◽  
pp. 1-22
Author(s):  
Abdurauf Younes ◽  
Silvia de la Flor ◽  
Stewart Clark ◽  
John Nutter ◽  
Martin Birkett ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Wear Rate ◽  
Coefficient Of Friction ◽  
Density Functional ◽  
Wear Testing ◽  
Partial Replacement ◽  
Tribological Behaviour ◽  
Wear Resistant

Abstract Promoting the martensitic transformation through optimum microalloying with Fe and/or Mn was observed to be an effective method to enhance the wear resistance of the Cu50Zr50 at. % shape memory alloy (SMA). Among all the potential microelements and concentrations, partial replacement of Cu by up to 1 at. % Fe and Mn is of interest since from density functional based calculations large minimization of the stacking fault energy (SFE) of the B2 CuZr phase is predicted. For this reason, an effective martensitic transformation is expected. The largest decrease of the SFE from 0.36 J/m2 to 0.26 J/m2 is achieved with partial replacement of Cu by 0.5 at. % Fe. This results in the highest martensitic transformation upon wear testing, especially at highest load (15 N) for which the mass loss is 0.0123 g compared to 0.0177 g for Cu50Zr50 and a specific wear rate of 5.9 mm3/Nm, compared to 8.5 for mm3/Nm for Cu50Zr50. This agrees with the low coefficient of friction of 0.48±0.05 and low roughness of 0.200±0.013 μm of the Fe-containing alloy compared to that for Cu50Zr50, 0.55 and 0.415±0.026 μm, respectively. All the worn surfaces show the formation of abrasive grooves, being shallowest for the more wear resistant 0.5 at. % Fe alloy. The second more wear resistant alloy contains 0.5 at. % Mn. Wear mechanisms of abrasion, adhesion and delamination have been identified.

Microstructure and Grain Abrasion Properties of Cr3C2-NiCr Coating Prepared by Laser Cladding Method

2012 ◽  
Vol 271-272 ◽  
pp. 3-7
Author(s):  
Long Wei ◽  
Zong De Liu ◽  
Xin Zhi Li ◽  
Ming Ming Yuan ◽  
Cheng Yuan Zhong
Keyword(s):  
Wear Resistance ◽  
Wear Rate ◽  
Laser Cladding ◽  
Micro Hardness ◽  
High Quality ◽  
Wear Resistant ◽  
Hardness Tester ◽  
Technology Analysis ◽  
Main Component

Cr3C2-NiCr has high quality of wear resistant properties and is widely used in abrasive environment. In this paper, Cr3C2-NiCr coating was prepared on 45 steel by laser cladding technology. Analysis and research of the coatings were achieved by SEM and XRD to determine the main component and the different region on coatings. The hardness and the element component were investigated by micro-hardness tester and EDS. Abrasion tests were performed to contrast the wear resistance of two materials. The results indicate that the hardness of the coatings is nearly 3 times as the substrate. The coatings are well combined with the substrate and the phase of Cr3C2 has a large proportion in the coatings. Abrasion tests show that the average of wear rate on substrate is 5.2 times as the coatings.

Effect of abrasive particle size on tribological behavior of elastomers

2019 ◽  
Vol 234 (3) ◽  
pp. 373-385 ◽  
Author(s):  
F Hakami ◽  
A Pramanik ◽  
AK Basak ◽  
N Ridgway ◽  
MN Islam
Keyword(s):  
Particle Size ◽  
Tensile Strength ◽  
Wear Rate ◽  
Coefficient Of Friction ◽  
Abrasive Particle ◽  
Tribological Behaviour ◽  
Elongation At Break ◽  
Tear Strength ◽  
Wear And Friction ◽  
Abrasive Size

Effect of abrasive particle size on tribological behaviour of different elastomers was investigated experimentally in this study. The size of abrasive particle size was varied from coarse (425 µm) to fine (82 µm). Wear rate and coefficient of friction were calculated and analyzed accordingly followed by the examination of worn surfaces by a scanning electron microscope to unravel the wear mechanism. Experimental results showed that abrasive size had a significant effect on wear and friction behaviour of the elastomers. As the abrasive particle size increased, wear rate and coefficient of friction also increased at different rates and exhibited different wear mechanisms that changed from friction to fatigue and roll formation. Mechanical properties of elastomers such as hardness, tensile strength, tear strength, and elongation at break also contributed to wear and friction. The effect of elongation at break and tensile strength on wear rate is more pronounced at lower abrasive particle size, whereas hardness and tear strength play a pivotal role at the higher abrasive size.

Effect of particle size on mechanical properties and tribological behaviour of aluminium/fly ash composites

2012 ◽  
Vol 19 (3) ◽  
pp. 247-253 ◽  
Author(s):  
Krishnan Ravi Kumar ◽  
Kothavady Mylsamy Mohanasundaram ◽  
Ganesan Arumaikkannu ◽  
Ramanathan Subramanian
Keyword(s):  
Tensile Strength ◽  
Wear Resistance ◽  
Fly Ash ◽  
Ultimate Tensile Strength ◽  
Coefficient Of Friction ◽  
Fine Particles ◽  
Dry Sliding Wear ◽  
Tribological Behaviour ◽  
Weight Percentage ◽  
Pin On Disc

AbstractIn the present study, aluminium alloy (A380) composites containing 3, 6, 9 and 12 weight percentage of fly ash particles were fabricated by liquid metallurgy technique. Three different size ranges of fly ash particles (50–75 μm, 75–103 μm and 103–150 μm) were used. The composites were evaluated for hardness, tensile strength, density, dry sliding wear and frictional behaviour. Pin-on disc apparatus was used to conduct wear tests at loads of 20, 30 and 40 N at a sliding speed of 3 m/s for a constant period of 10 min. Results showed that hardness, ultimate tensile strength, wear resistance and coefficient of friction were superior in composites reinforced with coarse fly ash particles (103–150 μm) compared to composites with fine particles. The hardness, ultimate tensile strength and wear resistance increased, whereas the coefficient of friction and density decreased with the increase in weight percentage of fly ash. Wear resistance and coefficient of friction decreased with increase in applied load. Scanning electron microscope investigations of worn-out samples were carried out to study the progress of wear.

Tribological Behaviour of Combined Coatings Deposited on Aluminium

2007 ◽  
Vol 280-283 ◽  
pp. 1453-1458 ◽  
Author(s):  
U. Akin ◽  
Harun Mindivan ◽  
R. Samur ◽  
E.S. Kayali ◽  
H. Çimenoğlu
Keyword(s):  
Wear Resistance ◽  
Pure Aluminum ◽  
Tribological Performance ◽  
Wear Testing ◽  
Oxide Coatings ◽  
Tribological Behaviour ◽  
Ptfe Film ◽  
Testing Conditions ◽  
Commercially Pure ◽  
Combined Coatings

In this paper the tribological performance of oxide (Cr2O3, ZrO2CaO and Al203) and combined coatings applied on a commercially pure aluminum sheet were presented. Combined coatings were produced by applying Polytetrafluoroethylene (PTFE) film on the oxide coatings. Among the oxide coatings Cr2O3 exhibited the highest and Al2O3 exhibited the lowest wear resistance, in accordance with their hardness. Combined coatings exhibited superior wear resistance than oxide coatings even at heavy wear testing conditions.

Tribology Study of Nanodiamond Hybrid Polyurethane/Epoxy Interpenetrating Polymer Networks Materials

2012 ◽  
Vol 557-559 ◽  
pp. 1533-1538 ◽  
Author(s):  
Shao Ling Xia ◽  
Lin Qi Zhang ◽  
Dong Mei Wang ◽  
Wen Jun Zou ◽  
Jin Peng ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Hybrid Materials ◽  
Rotational Speed ◽  
Polymer Networks ◽  
Testing Machine ◽  
Interpenetrating Polymer Networks ◽  
Wear Testing ◽  
Wear Resistant ◽  
Nd Addition ◽  
Hybrid Polyurethane

Tribology behavior of Nanodiamond(ND) polyurethane(PU)/epoxy(EP) interpenetrating polymer networks hybrid materials were tested by friction wear testing machine. Results showed that when EP content was 30%, resultant PU/EP IPNs exhibited best wear resistance. For ND-PU/EP IPNs hybrids, when the ND addition was 0.2wt%, the best wear resistant ability was obtained. Under dry condition, the effect of wear parameters, such as rotational speed, load and central distance to friction and abrasion value were also investigated.

Wear resistance of maraging steel developed by direct metal laser sintering

2020 ◽  
Vol 10 (7) ◽  
pp. 1079-1090 ◽  
Author(s):  
Gulam Mohammed Sayeed Ahmed ◽  
Irfan Anjum Badruddin ◽  
Vineet Tirth ◽  
Ali Algahtani ◽  
Mohammed Azam Ali
Keyword(s):  
Wear Resistance ◽  
Wear Rate ◽  
Maraging Steel ◽  
Normal Load ◽  
Testing Machine ◽  
Wear Test ◽  
Laser Sintering ◽  
Wear Testing ◽  
Direct Metal Laser Sintering ◽  
Wear Tests

This work presents wear study on maraging steel developed by additive manufacturing using Direct Metal Laser Sintering, utilizing a laser beam of high-power density for melting and fusing the metallic powders. Short aging treatment was given to the specimen prior to the wear tests. The density and the hardness of the 3D printed maraging steel were found to be better than the homogenized-aged 18Ni1900 maraging steel. The wear resistance is an important aspect that influences the functionality of the components. The wear tests in dry condition were performed on maraging steel on pin/disc standard wear testing machine. The design of experiments was planned and executed based on response surface methodology. This technique is employed to investigate three influencing and controlling constraints namely speed, load, and distance of sliding. It has been observed that sliding speed and normal load significantly affects the wear of the specimen. The statistical optimization confirms that the normal load, sliding distance, and speed are significant for reducing the wear rate. The confirmation test was conducted with a 95% confidence interval using optimal parameters for validation of wear test results. A mathematical model was developed to estimate the wear rate. The experimental results were matched with the projected values. The wear test parameters for minimum and maximum wear rate have been determined.

Study of Tribological Behaviour of AA6351/SiC/Gr Hybrid Metal Matrix Composite using Taguchi Technique

2019 ◽  
Vol 11 (3) ◽  
Author(s):  
M. Vijaya ◽  
K. Srinivas ◽  
N.B.Prakash Tiruveedula
Keyword(s):  
Wear Resistance ◽  
Frictional Force ◽  
Metal Matrix ◽  
Testing Machine ◽  
Wear Testing ◽  
High Wear Resistance ◽  
Wear Property ◽  
Taguchi Technique ◽  
Tribological Behaviour ◽  
The Impact

Using stir-casting, the hybrid aluminium metal matrix composites are prepared with the reinforcement of SiC and graphite particulates by varying equally 2%, 4%, 6%, and 8% by weight. The wear and frictional force for the prepared specimens were investigated through pin on disc wear testing machine. Exercising ANOVA technique, the wear rate and coefficient of friction was accomplished with the impact of applied load, sliding speed and sliding distance. Using Taguchi technique, experiments have been performed depending on the design of experiments. For analysis of data L9 Orthogonal array was preferred. Wear resistance and frictional force were influenced majorly with the reinforcement of graphite. The morphology of the depleted surfaces and the wear fragments were analysed to recognize the wear property. Distinguished to other percentages of reinforcements, 6% wt. of SiC and 6% wt. of graphite has demonstrated high wear resistance.

scholarly journals Experimental and Analytical Investigations on Tribological Properties of PTFE/AP Composites

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4295
Author(s):  
Hai Wang ◽  
Annan Sun ◽  
Xiaowen Qi ◽  
Yu Dong ◽  
Bingli Fan
Keyword(s):  
Wear Resistance ◽  
Wear Rate ◽  
Coefficient Of Friction ◽  
Tribological Properties ◽  
Chemical Structure ◽  
Element Composition ◽  
Support Material ◽  
Test Conditions ◽  
Transfer Films ◽  
The Coefficient Of Friction

The tribological properties of polytetrafluoroethylene (PTFE)/AP (poly(para-phenyleneterephthalamide) (PPTA) pulp) composites under different test conditions (load: 2N, 10N; frequency: 1 Hz, 4 Hz; amplitude: 2 mm, 8 mm) were holistically evaluated. PTFE/AP composites with different AP mass ratios of 3%, 6%, and 12% as a skeleton support material were prepared. The coefficient of friction (COF) and wear rate were determined on a ball-on-disk tribometer. Furthermore, the morphology, element composition, and chemical structure of the transfer membrane were analyzed accordingly. The relationships between load, frequency, amplitude, and tribological properties were further investigated. According to the wear mechanism, AP enables effective improvement in the stiffness and wear resistance, which is also conducive to the formation of transfer films.

scholarly journals Effect of Bulk Current Density on Tribological Properties of Fe-W, Co-W and Ni-W Coatings

2015 ◽  
Author(s):  
S.A. Silkin ◽  
A.V. Gotelyak ◽  
N. Tsyntsaru ◽  
A.I. Dikusar ◽  
R. Kreivaitis ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Coefficient Of Friction ◽  
Current Density ◽  
Dry Friction ◽  
Scratch Test ◽  
Tribological Behaviour ◽  
The Coefficient Of Friction ◽  
Current Densities ◽  
Scratch Tests ◽  
The Given

Evaluation of tribological behaviour of Fe-W, Ni-W and Co-W coatings produced by electrodeposition at various bulk current densities (BCD) was under investigation in the given study. BCD does not have essential effect on the microhardness and wear characteristics of Fe-W and Co-W coatings. But the scratch tests reveal the presence of such influence. These tests showed superior wear resistance for the coatings obtained at low BCD. It was found that BCD has influence on wear resistance of Ni-W coatings under dry friction conditions. The BCD also has an influence on the coefficient of friction of Fe-W and Ni-W coatings at dry friction conditions. However, such an effect is opposite to that, observed at the scratch test.

Influence of Reinforcement of TiC Particles on Wear Behaviour of Al7075/TiC Composite Material

2020 ◽  
Vol 37 ◽  
pp. 37-45
Author(s):  
Eshan S. Agrawal ◽  
Vinod B. Tungikar
Keyword(s):  
Composite Material ◽  
Wear Rate ◽  
Coefficient Of Friction ◽  
Centrifugal Casting ◽  
Testing Machine ◽  
Casting Machine ◽  
Wear Test ◽  
Wear Testing ◽  
Wear Behaviour ◽  
Weight Percentage

TiC particles are reinforced with Al 7075 to develop metal matrix composite. Special purpose die is fabricated for centrifugal casting machine for the preparation of composite material. The tribological properties such as wear rate and coefficient of friction are determined by using pin on disc wear testing machine. Weight percentage of TiC, applied load, sliding distance are considered as parameters for the wear test. The results show that the wear resistance of the developed composite increases with increase of TiC percentage. Wear rate of Al-TiC composite is observed to be reduced by 11%, 31% and 42% with increasing percentage of TiC by 2.5%, 5% and 7.5% respectively. SEM and EDS analysis are used for morphological study of the worn surfaces of composite. Keywords: Composites, Al-TiC, Wear, Coefficient of Friction (CoF), SEM

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