Influence of ultrasonic agitation on the abrasive wear characteristics of Al-Cu/ 2 vol.% Grp composite

2021 ◽  
Author(s):  
Ramendra Kumar Gupta ◽  
Nitesh Vashishtha ◽  
S.G. Sapate ◽  
V. Udhayabanu ◽  
D R Peshwe
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Graphite Particle ◽  
Wear Behavior ◽  
Base Alloy ◽  
Graphite Layer ◽  
Material Layer ◽  
Abrasive Wear Behavior ◽  
Contact Surfaces ◽  
Wear Tests

Abstract In the present study, the abrasive wear behavior of Al-4.4 wt.% Cu composite reinforced with 2 vol.% graphite particle (Grp) has been investigated. In the preparation of composite, Ultrasonic Treatment (UT) is provided in the composite melt for the uniform distribution of reinforcement particles. Two bond abrasive wear tests are conducted for composites treated with ultrasound and without UT and base alloy. The results of abrasive wear studies indicate that at 5 and 10 Newton (N) loads, the composite with UT has a higher coefficient of friction (COF) and wear resistance than that of the base alloy (Al-4.4 wt.% Cu). Whereas, at 15 and 20 N load, the value of COF and wear resistance is lower for the composite. Two abrasive wear mechanisms micro-plowing and micro-cutting have been observed during the wear tests of base alloy and composites. The analysis of worn-out sample surfaces at higher load reveals that softened material layer due to localized elevation in temperature between two contact surfaces during wearing acts as a tribolayer in base alloy while in composites both softened material layer and graphite layer have worked together as tribolayer.

Abrasive Wear Behavior of Permanent Moulded Toughened Austempered Ductile Iron

2009 ◽  
Author(s):  
T. R. Uma ◽  
J. B. Simha ◽  
K. Narasimha Murthy
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Ductile Iron ◽  
Wear Behavior ◽  
Structural Features ◽  
Abrasive Wear Resistance ◽  
Austempered Ductile Iron ◽  
Graphite Morphology ◽  
Abrasive Wear Behavior ◽  
Austempering Temperature

Laboratory abrasive wear tests have been reported on permanent moulded toughened austempered ductile iron. The influence of austempering temperature on the abrasive wear behavior have been studied and discussed. The results indicate that with increase in austempering temperature from 300°C to 350°C, the abrasive wear resistance increased, and as the austempering temperature increased to 400°C, there was reduction in the abrasive wear resistance. These results have been interpreted based on the structural features and graphite morphology.

scholarly journals Niobium Additions to a 15%Cr–3%C White Iron and Its Effects on the Microstructure and on Abrasive Wear Behavior

Metals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1321 ◽  
Author(s):  
Arnoldo Bedolla-Jacuinde ◽  
Francisco Guerra ◽  
Ignacio Mejia ◽  
Uzzi Vera
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Abrasive Wear ◽  
Volume Fraction ◽  
Wear Behavior ◽  
Solidification Process ◽  
White Iron ◽  
Bulk Hardness ◽  
Abrasive Wear Behavior ◽  
Cast Alloys

From the present study, niobium additions of 1.79% and 3.98% were added to a 15% Cr–3% C white iron, and their effects on the microstructure, hardness and abrasive wear were analyzed. The experimental irons were melted in an open induction furnace and cast into sand molds to obtain bars of 45 mm diameter. The alloys were characterized by optical and electron microscopy, and X-ray diffraction. Bulk hardness was measured in the as-cast conditions and after a destabilization heat treatment at 900 °C for 30 min. Abrasive wear resistance tests were undertaken for the different irons according to the ASTM G65 standard in both as-cast and heat-treated conditions under three loads (58, 75 and 93 N). The results show that niobium additions caused a decrease in the carbon content in the alloy and that some carbon is also consumed by forming niobium carbides at the beginning of the solidification process; thus decreasing the eutectic M7C3 carbide volume fraction (CVF) from 30% for the base iron to 24% for the iron with 3.98% Nb. However, the overall carbide content was constant at 30%; bulk hardness changed from 48 to 55 hardness Rockwell C (HRC) and the wear resistance was found to have an interesting behavior. At the lowest load, wear resistance for the base iron was 50% lower than that for the 3.98% Nb iron, which is attributed to the presence of hard NbC. However, at the highest load, the wear behavior was quite similar for all the irons, and it was attributed to a severe carbide cracking phenomenon, particularly in the as-cast alloys. After the destabilization heat treatment, the wear resistance was higher for the 3.98% Nb iron at any load; however, at the highest load, not much difference in wear resistance was observed. Such a behavior is discussed in terms of the carbide volume fraction (CVF), the amount of niobium carbides, the amount of martensite/austenite in matrix and the amount of secondary carbides precipitated during the destabilization heat treatment.

scholarly journals Effect of microstructure on the abrasive wear resistance of steels with hardness 450 HV

2019 ◽  
Vol 36 (1−2) ◽  
Author(s):  
Oskari Haiko ◽  
Vuokko Heino ◽  
David A Porter ◽  
Juha Uusitalo ◽  
Jukka Kömi
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Wear Behavior ◽  
Surface Hardness ◽  
Abrasive Wear Resistance ◽  
Scratch Testing ◽  
Tempered Martensite ◽  
Cooling Rates ◽  
Abrasive Wear Behavior ◽  
Main Factor

Hardness has been considered the main factor controlling the abrasive wear of steels. However, microstructure also affects the wear behavior. Four steels with different microstructures were produced with a Gleeble 3800 thermomechanical simulator and tested for abrasive wear behavior. Different cooling rates and heat treatments were applied to obtain a surface hardness of approximately 450 HV. Mainly tempered martensite, pearlite and some bainite could be observed in the microstructures. Scratch testing with a CETR UMT-2 tribometer was conducted to produce wear tracks. The results revealed that each steel showed distinct wear behavior.

The Wear Behavior of Shots Impeller Pair in Shot Blast Cleaning

2013 ◽  
Vol 364 ◽  
pp. 37-41 ◽  
Author(s):  
Ling Hui Song ◽  
Shou Ren Wang ◽  
Ying Zi Wang ◽  
Pei Long Song ◽  
Guang Ji Xue
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Investment Casting ◽  
Wear Behavior ◽  
Shot Blasting ◽  
High Chromium ◽  
Casting Technology ◽  
Abrasive Wear Behavior ◽  
Materials Used ◽  
The Ideal

This article discussed the compound impact-abrasive wear behavior of shots impeller pair in shot blast cleaning. The shots impeller pairs were fabricated by investment casting processing. The predominance and shortcoming of investment casting for high chromium wear resistance materials used in shot blasting machine were also analyzed. Using investment casting technology, the high-Cr iron casting would be improvement in interal and explicit quality. And, owing to different included angles of shots, the blade show different wear behavior. The ideal included angle of shots is 12o. Increase in the angles leads to decreases of the wear resistance.

Wear Behavior of MoSi2 and MoSi2 Matrix Composites

1994 ◽  
Vol 350 ◽  
Author(s):  
D. E. Alman ◽  
J. A. Hawk ◽  
A. V. Petty
Keyword(s):  
Wear Resistance ◽  
Intermetallic Compound ◽  
Abrasive Wear ◽  
Wear Behavior ◽  
Refractory Metals ◽  
Advanced Materials ◽  
Matrix Composites ◽  
High Stiffness ◽  
Wear Tests ◽  
The U.S

AbstractThe U.S. Bureau of Mines is examining the wear behavior of a variety of advanced materials, including the intermetallic compound MoSi2. The high stiffness and hardness of MoSi2 make it attractive for use in applications requiring wear resistance. This research reports on the results of pin abrasion wear tests for a variety of powder processed MoSi2 and MoSi2 matrix composites. The effect of the addition of ductile (Nb) and brittle (SiC) reinforcements, as well as the influence of reinforcement type and orientation geometry, on abrasive wear is discussed. Comparisons of the wear behavior of MoSi2 and MoSi2-based composites with other materials, such as refractory metals, aluminides, and ceramics, are made.

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.

The Influence of Powder Types and Plasma Spray Conditions on Abrasive Wear of Nanostructured and Conventional Al2O3/TiO2 Coatings

2007 ◽  
Vol 539-543 ◽  
pp. 1294-1299 ◽  
Author(s):  
You Wang ◽  
D.L. Wang ◽  
G. Liu ◽  
W. Tian ◽  
C.H. Wang
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Crack Resistance ◽  
Thermal Spray ◽  
Plasma Spray ◽  
Wear Mechanisms ◽  
Wear Behavior ◽  
Abrasive Wear Behavior ◽  
Tio2 Coatings

In this paper, Al2O3/TiO2 coatings via thermal spray approach using three different feedstock powders, i.e., (a) reconstituted nanosized Al2O3/TiO2 feedstock powders, (b) reconstituted nanosized Al2O3/TiO2/ZrO2/CeO2 feedstock powders and (c) conventional Al2O3/TiO2 feedstock powders are described. Effects of different powder types and various plasma spray conditions on the density, microhardness and crack resistance, especially on the abrasive wear behavior of the coatings have been evaluated. The result showed that the coatings sprayed using different feedstock powders exhibit different abrasive wear behavior with changing the plasma spray conditions. The coatings sprayed using the reconstituted nanosized Al2O3/TiO2/ZrO2/CeO2 feedstock powders showed a significantly improved wear resistance compared to the coatings sprayed using reconstituted nanosized Al2O3/TiO2 feedstock powders or conventional Al2O3/TiO2 feedstock powders. The wear mechanisms of the coatings were discussed.

Three-Body Abrasive Wear Behavior of Basalt and Glass Fabric Reinforced Epoxy Composites

2011 ◽  
Vol 121-126 ◽  
pp. 534-538 ◽  
Author(s):  
C. Anand Chairman ◽  
S.P. Kumaresh Babu
Keyword(s):  
Weight Loss ◽  
Wear Resistance ◽  
Wear Rate ◽  
Abrasive Wear ◽  
Wear Behavior ◽  
Basalt Fiber ◽  
Specific Wear Rate ◽  
Abrasive Wear Behavior ◽  
Three Body ◽  
Increasing Load

Three-body abrasive wear behavior of basalt–epoxy (B–E) and glass–epoxy (G–E) composites have been investigated using Dry sand rubber wheel abrasion resistance for various abrading distance, viz., 150, 300, 450 and 600m and different loads(22N and 32N) at 200 rpm. The weight loss and specific wear rate as a function of load and abrading distance were determined. The weight loss increases with increasing load and also with abrading distance while the specific wear rate decreases with increase in abrading distance and increases with the load. Better abrasion wear resistance was observed in B-E composite compared to G–E composite. Scanning Electron Microscope (SEM) is used to examine the abraded composite specimens and revealed that the more damage occur to glass fiber compared to basalt fiber. Also good interfacial adhesion was observed between epoxy and basalt fiber which leads to good abrasive wear resistance.

Mechanical and Three-body Abrasive Wear Behavior of Carbon-Epoxy Composite With and Without Graphite Filler

2010 ◽  
Vol 44 (21) ◽  
pp. 2509-2519 ◽  
Author(s):  
B. Suresha ◽  
B.N. Ramesh ◽  
K.M. Subbaya ◽  
G. Chandramohan
Keyword(s):  
Mechanical Properties ◽  
Abrasive Wear ◽  
Wear Behavior ◽  
Testing Machine ◽  
High Strength ◽  
Filler Loading ◽  
Wear Volume ◽  
Abrasive Wear Behavior ◽  
Three Body ◽  
Wear Tests

Fiber and particulate reinforced polymeric composites are known to possess high strength and attractive wear resistance in dry sliding conditions. Though the reinforcement and/filler type are known to control the properties, less is known about their tribo performance especially with graphite as filler material. How these composites perform in abrasive wear situations needs a proper understanding. Hence, the present investigation reports on the mechanical and three-body abrasive wear behavior of carbon fabric reinforced epoxy (C-E) and silane treated graphite filled C-E (Gr-C-E) composites. The mechanical properties were evaluated using Universal testing machine. In three-body wear tests, quartz particles of size 150-200 μm were used as dry and loose abrasives. Three-body abrasive wear tests were conducted using rubber wheel abrasion tester under different loads/abrading distances. The results showed that the wear volume increased with increasing abrading distance and the specific wear rate decreased with abrading distance/load and depends on filler loading. However, the presence of silane treated graphite filler in C-E showed a promising trend. Further, the abrasive wear volume of composites has been correlated with mechanical properties such as hardness, tensile strength and percentage elongation. The worn surface features, when examined through scanning electron microscopy, showed more number of broken carbon fibers in C-E compared to graphite filled C-E composites.

Sign in / Sign up

Export Citation Format

Share Document