scholarly journals Investigation of Mechanical and Wear Properties of LM24/Silicate/Fly Ash Hybrid Composite Using Vortex Technique

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
B. R. Senthil Kumar ◽  
M. Thiagarajan ◽  
K. Chandrasekaran
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Fly Ash ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Wear Behavior ◽  
Wear Properties ◽  
Alloy Matrix ◽  
Pin On Disc ◽  
Wear Reduction

This work has investigated to find the influence of silicate on the wear behavior of LM 24/4 wt.% fly ash hybrid composite. The investigation reveals the effectiveness of incorporation of silicate in the composite for gaining wear reduction. Silicate particles with fly ash materials were incorporated into aluminum alloy matrix to accomplish reduction in wear resistance and improve the mechanical properties. The LM24/silicate/fly ash hybrid composite was prepared with 4 wt.% fly ash particles with 4, 8, 12, 16, 20, and 24 wt.% of silicate using vortex technique. Tribological properties were evaluated under different load (15, 30, 45, 60, and 75 N); sliding velocity (0.75, 1.5, 2.25, and 3 m/sec) condition using pin on disc apparatus and mechanical properties like density, hardness, impact strength, and tensile strength of composites were investigated. In addition, the machining of the aluminum hybrid composite was studied using Taguchi L9orthogonal array with analysis of variance. The properties of the hybrid composites containing 24 wt.% silicates exhibit the superior wear resistance and mechanical properties.

Experimental Investigations on Wear Behavior of AA20204-Flyash-Nanostructured Redmud Hybrid Composites Synthesized by Stircasting

2018 ◽  
Vol 6 (2) ◽  
pp. 23-35
Author(s):  
Anitha Santhoshi Madugula ◽  
B. Murali Krishna ◽  
G. Swaminaidu
Keyword(s):  
Wear Resistance ◽  
Fly Ash ◽  
Red Mud ◽  
Sliding Mode ◽  
Hybrid Composites ◽  
Wear Behavior ◽  
Normal Load ◽  
High Energy ◽  
Experimental Investigations ◽  
Dispersion Strengthening

Red mud emerges as the major waste material during the production of alumina from bauxite and its potential as a filler material in metal matrices has not yet been reported. In view of this, an attempt is made to explore the possibility of making a class of wear resistant metal matrix hybrid composites with nano-structured red mud and micro sized fly ash particles as reinforcement. The micro-sized red mud particles have been modified to nano-structured red mud using high energy ball milling and after 30 hours of milling, the size was reduced from 100 microns to 30 nm. Composites were fabricated by stir casting and experiments were conducted under laboratory condition to assess the wear characteristics of AA2024- 15 wt% fly ash (micro-sized) and varying fractions (2 wt%, 4 wt% and 6 wt%) red mud (nano-structured) hybrid composites under different working conditions in pure sliding mode on a pin-on-disc machine. Tests were conducted with sliding speeds of 200 rpm, 400 rpm and 600 rpm at loads of 10N, 20N and 30N. The increased frictional thrust at higher load results in increased de-bonding and caused easy removal of material and hence the wear rate is increased with increase in normal load. The wear resistance of the composite is increased with increase in red mud fraction. This is due to the increase in surface energy and inter-atomic bonding with increase in nano-structured red mud fraction. The addition of redmud particles to the matrix phase causes dispersion strengthening and hence the strength as well. Wear resistance is increased with increase in redmud fraction.

Thermal and Mechanical Properties of Epoxy Resin Functionalized Copper and Graphene Hybrids using In-situ Polymerization Method

2020 ◽  
Vol 16 ◽  
Author(s):  
Nadia A. Ali ◽  
Alaa M. Abd-Elnaiem ◽  
Seenaa I. Hussein ◽  
Asmaa Sh. Khalil ◽  
Hatem R. Alamri ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Wear Resistance ◽  
Epoxy Resin ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Weight Ratio ◽  
Epoxy Composites ◽  
Thermal And Mechanical Properties ◽  
Maximum Hardness

Objective: In this work, graphene (Gr) or/and Cu particles are used to improve the thermal and mechanical properties of epoxy resin. Methods: Various contents of Gr powder (0.1, 0.3, and 0.5 wt%), Cu powder (10, 30, and 50 wt%) were loaded to epoxy to form Gr/epoxy and Cu/epoxy composites, respectively. In addition, hybrids epoxy/Cu/Gr samples were prepared with a selection of lowest (0.1 and 10) and highest (0.5 and 50) ratios of Gr, and Cu, respectively. Results: The thermal conductivity increases with the increasing weight ratio of Gr and Cu as compared to the pure epoxy. The Thermogravimetric analysis (TGA) of epoxy composites and hybrid composites reveals an improvement in the thermal stability. In addition, the mechanical properties such as hardness shore D and the wear resistance are enhanced for both the epoxy composites and hybrids composites. However, the Ep+0.5wt%Gr+50wt%Cu hybrid composite has the maximum hardness 84, thermal conductivity of 3.84 W/m.K, it shows the lowest wear resistance 2.7×10-6 mm3/Nm at loading 10 N. Conclusion: The hybrid composite containing 0.5wt%Gr and 50wt%Cu shows the maximum hardness and thermal conductivity, as well as the lowest wear resistance when compared to other composites. The physical properties of the hybrid composite can be controlled by the host blend, and hence the morphology, and interfacial characteristics.

Influence of Carbon Content in Cobalt-Based Superalloys on Mechanical and Wear Properties

2004 ◽  
Vol 126 (2) ◽  
pp. 204-212 ◽  
Author(s):  
Rong Liu ◽  
Matthew X. Yao ◽  
Xijia Wu
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Carbon Content ◽  
X Ray Diffraction ◽  
Wear Properties ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Pin On Disc ◽  
Rotating Bending ◽  
The Impact

Two cobalt-based superalloys containing 1.6% and 2% carbon respectively were studied, with the emphasis on the influence of the carbon content on their microstructures, wear resistance, and mechanical properties. Phase formation and transformation in the microstructures were analyzed using metallographic, X-ray diffraction, and differential scanning calorimetry techniques. Wear resistance, tensile and fatigue behaviors of the alloys were investigated on a pin-on-disc tribometer, MTS machine and rotating-bending machine, respectively. It is found that the wear resistance was increased significantly with the carbon content. The mechanical properties of the alloys are also influenced by the carbon content, but the impact is not so significant as on the wear resistance. It was observed that the carbon content increased the yielding strength and fatigue strength, but decreased the fracture stress and fracture strain.

Effect of Reinforcements on the Sliding Wear Behavior of Self-Lubricating AZ91D-SiC-Gr Hybrid Composites

2022 ◽  
Vol 10 (1) ◽  
pp. 1-19
Author(s):  
Sandeep Kumar Khatkar ◽  
Rajeev Verma ◽  
Suman Kant ◽  
Narendra Mohan Suri
Keyword(s):  
Wear Rate ◽  
Sliding Wear ◽  
Hybrid Composites ◽  
Wear Behavior ◽  
Signal To Noise Ratio ◽  
Normal Load ◽  
Critical Factor ◽  
Wear Properties ◽  
Pin On Disc ◽  
Sliding Distance

This article statistically investigates the effect of various parameters such as material factors: silicon carbide (SiC) reinforcement, graphite (Gr) reinforcement and mechanical factors: normal load, sliding distance and speed on the sliding wear rate of vacuum stir cast self-lubricating AZ91D-SiC-Gr hybrid magnesium composites. The sliding wear tests have been performed on pin-on-disc tribometer at 10-50N loads, 1-3m/s sliding speed and 1000-2000m sliding distance. It has been examined that hybrid composites yielded improved wear resistance with reinforcement of SiC and solid lubricant graphite. ANOVA and signal-to-noise ratio investigation indicated that applied load was the most critical factor influencing the wear rate, followed by sliding distance. Further, the AZ91D/5SiC/5Gr hybrid composite has exhibited the best wear properties. From the SEM and EDS analysis of worn surfaces, delamination was confirmed as the dominant wear mechanism for AZ91D-SiC-Gr hybrid composites.

Correlation of Reinforced Ceramicparticle’s Nature and Size with Microstructure and Wear Behavior of Al-Si Alloy Composite

2012 ◽  
Vol 585 ◽  
pp. 564-568 ◽  
Author(s):  
Vipin Sharma ◽  
Suresh Kumar ◽  
O.P. Pandey
Keyword(s):  
Wear Resistance ◽  
Wear Behavior ◽  
Eutectic Silicon ◽  
Microstructural Analysis ◽  
Sand Particle ◽  
Wear Properties ◽  
Alloy Matrix ◽  
Aluminium Matrix Composite ◽  
Zircon Sand ◽  
Sand Particles

The present study aims to analyze the effect of particle size on nature of microstructural features and wear behavior of composite. Stir casting route has been adopted for the fabrication of aluminium matrix composite using Al-Si LM13 piston alloy. Composites have been developed by varyig the size of zircon sand particles while keeping the SiC particles of same size. Microstructural analysis shows that SiC has a pronounced effect on the microstructure and eutectic silicon refinement. Microstructure evolution is mainly governed by the thermal conductivity difference between two phase’s i.e. ceramic particle and alloy matrix. The dendritic ripening is also observed in the composites in microstructural study. EDS analysis reveals the formation of mechanically mixed layer in the composites enabling better wear properties. Fine size zircon sand particle reinforced composite exhibits better wear resistance than coarse particle at same weight percentage of reinforcement. The SiC reinforcement is better as compared to zircon sand particles for enhancing wear resistance of the composite. Silicon carbide refines the eutectic silicon whereas zircon sand provides good interfacial bonding. SEM examination of worn surface and wear debris shows that the various wear mechanism are involved in material removal.

The Influence of Hydrostatic Extrusion on the Properties of an Austenitic Stainless Steel

2006 ◽  
Vol 114 ◽  
pp. 57-62 ◽  
Author(s):  
Julia Budniak ◽  
Małgorzata Lewandowska ◽  
Wacław Pachla ◽  
Mariusz Kulczyk ◽  
Krzysztof Jan Kurzydlowski
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Wear Resistance ◽  
Friction Coefficient ◽  
Wear Test ◽  
Extrusion Process ◽  
Hydrostatic Extrusion ◽  
Compression Tests ◽  
Wear Properties ◽  
Pin On Disc

The paper presents the results of investigations into the mechanical properties and tribological characteristics of 316 LVM processed by hydrostatic extrusion (HE). The mechanical properties were characterized by microhardness measurements and compression tests. The wear properties were investigated using a pin-on-disc tribometer under dry and lubricated conditions. The friction coefficient was measured as a function of the time of the wear test. The results indicate that the hydrostatic extrusion process significantly improves the mechanical properties and the wear resistance of 316 LVM stainless steel. The results are discussed in terms of the microstructural changes induced during processing by hydrostatic extrusion.

Effect of applied pressure on high-stress abrasive wear behavior of hybrid Al–Mg–Si composites

2016 ◽  
Vol 231 (8) ◽  
pp. 1089-1100
Author(s):  
N Ch Kaushik ◽  
RN Rao
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Hybrid Composites ◽  
Wear Behavior ◽  
Applied Pressure ◽  
High Stress ◽  
Matrix Alloy ◽  
Grit Size ◽  
Pin On Disc ◽  
Marginal Improvement

In this experimental investigation, the effect of applied pressure on high-stress abrasive wear resistance characteristics of stir-cast Al 6082-5 wt% SiC-5 wt%Gr (Al–SiC–Gr) hybrid metal matrix composites was studied and compared with its unreinforced matrix alloy and 10 wt% SiC-reinforced (Al–SiC) composites. The tests were carried on pin-on-disc equipment at applied pressures of 0.1–0.3 MPa, sliding distance of 75 m, and SiC abrasive grit size of 100 µm and 200 µm. It was noted that the wear resistance decreases with increase in applied pressure in both as-cast and T6 conditions. The improvement in wear resistance was 1.63 (alloy) to 3.29 m/mm3 (Al–SiC–Gr) in case of lower grit size and applied pressures. However, the marginal improvement of wear resistance was observed i.e. 0.67 (alloy) to 1.05 m/mm3 (Al–SiC–Gr) at higher grit size and applied pressures. Relative wear resistance plots indicate that hybrid composites conceded better wear resistance properties compared to SiC-reinforced composites. The evaluation of wear mechanisms, worn surfaces of the pins, emery papers, and debris was also studied using scanning electron microscopy.

Investigation of Microstructural and Mechanical Properties of Al 5083-ZrSiO4-Gr Hybrid Composite

2018 ◽  
Vol 17 (04) ◽  
pp. 1760029
Author(s):  
T. Hariprasad ◽  
K. Varatharajan ◽  
S. Ravi
Keyword(s):  
Mechanical Properties ◽  
Hybrid Composite ◽  
Normal Load ◽  
Wear Test ◽  
Stir Casting ◽  
X Ray Diffraction ◽  
Wear Properties ◽  
Casting Technique ◽  
Mechanical And Tribological Properties ◽  
Pin On Disc

In this present work, an attempt is made to compare the microstructural, mechanical and tribological properties of Al 5083-5% and 10% Gr, Al 5083-5% and 10% ZrSiO4 composite with Al 5083-5, 10% Gr-5 and 10% ZrSiO4 hybrid composite. The samples were prepared by using the stir casting technique, and the characterizations of composites and hybrid composite were observed by using SEM, EDAX and X-ray diffraction (XRD). The mechanical properties such as hardness, tensile, compressive strength of hybrid composite were found to be better than those of composites. The wear test was carried out by using a pin-on-disc wear tribometer by varying parameters like normal load (5, 10[Formula: see text]N), sliding speed (1, 1.5, 2[Formula: see text]m/s) with constant sliding distance (2000[Formula: see text]m). The worn surface of the samples is examined by using SEM, and the wear properties of the hybrid composite are found to exhibit superior wear resistance properties than composites.

scholarly journals Evaluation of Wear Properties of Heat-treated Al 7075/Graphite Powder/Bagasse ash Hybrid Metal Matrix Composites

2019 ◽  
pp. 201-210
Author(s):  
Prof Maibusab ◽  
H K Shivanand ◽  
Madhu M. G. ◽  
Shivaraj H.A. ◽  
Sumana B. G.
Keyword(s):  
Wear Rate ◽  
Coefficient Of Friction ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Research Work ◽  
Graphite Powder ◽  
Dry Sliding ◽  
Wear Properties ◽  
Al 7075 ◽  
Pin On Disc

This research work investigated the in?uence of graphite powder on the wear behavior of Al 7075/Graphite Powder (Gr)/Bagasse ash (BA) hybrid composite. The investigation reveals the effectiveness of incorporation of graphite powder in the composite for gaining wear reduction. The Al 7075 (Aluminium alloy 7075) reinforced with graphite powder and Bagasse ash were investigated. The conventional liquid casting technique was used for the fabrication of composite material and subjected to T6 heat treatment. The reinforcement content was chosen as 1, 3, and 5wt. % of graphite powder to identify its potential for self-lubricating property under dry sliding conditions. Hybrid composite is processed at 1wt% of Gr with 2, 4 and 6wt% of BA. The effect of load on dry sliding wear rate and coefficient of friction performance of Al 7075 casting alloy and its composites was evaluated by using a pin-on-disc with two different loads with constant speed at room temperature. Wear tests were conducted by using pin on disc apparatus to evaluate the tribological behaviour of the composite and to determine the optimum content of graphite powder for its minimum wear rate. The wear rate decreases with addition of graphite powder content and reaches its minimum at 5wt. % graphite. The coefficient of friction decreases with addition of graphite content and was found to be minimum at wt. 5% graphite. The wear properties of the hybrid composites containing graphite exhibited the superior wear-resistance properties.

Wear Properties of Al-17Si Alloys with Variable Fe Levels Formed by Semi-Solid Process

2014 ◽  
Vol 217-218 ◽  
pp. 111-118
Author(s):  
Shu Sen Wu ◽  
Chong Lin ◽  
Shu Lin Lü ◽  
Ping An
Keyword(s):  
Wear Resistance ◽  
Applied Load ◽  
Volume Fraction ◽  
Wear Behavior ◽  
Dry Sliding Wear ◽  
Wear Properties ◽  
Load Range ◽  
Casting Alloys ◽  
Pin On Disc ◽  
Semi Solid

The Fe-rich Al-Si alloys have the potential to be used to make wear-resistant parts. However, there has been few work devoted to study the wear behavior of the hypereutectic Al-Si alloys with about 2% Fe (mass %). In this work, the semi-solid slurry of the alloy was prepared by an ultrasonic vibration (USV) process. The effect of Fe content on dry sliding wear properties of the alloys rheo-casted after USV treatment was investigated. The wear tests were carried out using a pin-on-disc wear tester at four different loads of 50N, 100N, 150N and 200N at a constant sliding speed of 0.75m/s. The results show that the wear rate of USV treated alloy increases almost linearly as the applied load increases from 50 N to 200N. The alloys made with semi-solid process exhibited improved wear resistance at the entire applied load range in comparison to the conventional casting alloys. At the applied load of 50N, oxidative wear is the dominant mechanism for the alloys with USV treatment. At 200N, a combination of delamination and oxidation wear is the main wear mechanism. The wear resistance of Al-17Si alloys containing 2% to 3% Fe is closely related to the morphology, size and volume fraction of Fe-bearing compounds, which can be changed by USV semi-solid process.

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