Slurry Erosive Wear Behavior of Forged Al6061-CeO2-TiO2 Hybrid Composites

2013 ◽  
Author(s):  
Ramesh Chinnakurli Suryanarayana ◽  
Ummar Khan Attaullah ◽  
Kumar Saheb ◽  
Apoorva Kumar ◽  
Manoj Kumar Rajput
Keyword(s):  
Aluminium Alloy ◽  
Corrosion Protection ◽  
Aluminium Alloys ◽  
Hybrid Composites ◽  
Wear Behavior ◽  
Hot Forging ◽  
Erosive Wear ◽  
Hot Extrusion ◽  
Matrix Alloy ◽  
Slurry Erosion

Aluminium alloys are being widely used in naval applications owing to their excellent corrosion resistance and high formability characteristics. One of the most popular naval components is the tarpedo blade which makes use of forged aluminium alloy followed by anodizing surface treatment for corrosion protection. In recent years, there have been few attempts to replace the conventional aluminium alloys by their composites for the tarpedo blade applications. Literature review clearly says that CeO2 (Ceria) coating on aluminium and aluminium composites enhances their corrosion protection in aggressive marine environment. Further, there are reports suggesting that combination of CeO2 and TiO2 do yield better corrosion protection. However, there is no information on the work related to development of hybrid ceramic reinforced aluminium alloy matrices with CeO2 and TiO2 as particulate reinforcements for potential naval applications. In the light of above, the present work focuses on the development of novel Al6061-CeO2-TiO2 hybrid metal matrix composite by stir casting route followed by hot extrusion with an extrusion ratio of 8:1 at a temperature 550 °C and hot forging at 475 °C. The developed forged hybrid composites and the matrix alloy have been evaluated for microstructure, micro hardness and slurry erosion wear tests as per the ASTM Standards.

scholarly journals Slurry Erosive Wear Behavior of Hot Extruded Al6061-Si3N4 Composite

2013 ◽  
Vol 773-774 ◽  
pp. 454-460 ◽  
Author(s):  
Chinnakurli Suryanarayana Ramesh ◽  
Saleem Khan ◽  
Khan Zulfiqar ◽  
K.S. Sridhar
Keyword(s):  
Silicon Nitride ◽  
Erosion Resistance ◽  
Wear Behavior ◽  
Erosive Wear ◽  
Hot Extrusion ◽  
Matrix Alloy ◽  
Stir Casting ◽  
Hydraulic Press ◽  
Silica Sand ◽  
Slurry Erosion

Silicon nitride possess excellent hot hardness and wear resistance coupled with very good corrosion resistance. Hence, in recent years, silicon nitride has been a serious contender as a reinforcement to develop light weight metal matrix composites for several technological applications. Al6061 is most popular matrix alloy as it possess excellent formability and in particular the quality of extrudates of Al6061 is quite high and are the most preferred in space and naval applications especially for support structures and torpedoes blades respectively. Improved corrosion and slurry erosion resistance on use of silicon nitride in nickel and aluminum alloy matrices have been reported by several researchers. In the light of the above, this paper focuses on development of Al6061-6wt% Si3N4 by stir casting the most economical and popular route followed by hot extrusion. Hot extrusion was carried out using 200T hydraulic press at extrusion ratio of 1:10 at a temperature of 550°C. Slurry erosion tests were carried out using 3.5% NaCl solution containing silica sand particles of size 312μm at different rotational speeds varying between 300 rpm and 1200 rpm. The sand concentration was varied from 10g/l to 40 g/l. Under identical test conditions, hot extruded Al6061-6wt% Si3N4 composite do possess better slurry erosion resistance when compared with matrix alloy. The mechanism involved in the material removal process during slurry erosion process will also be discussed.

Design of Experiments to Study Slurry Erosive Wear Behavior of Inconel-718 Coatings on Copper

2014 ◽  
Vol 939 ◽  
pp. 459-464 ◽  
Author(s):  
C.S. Ramesh ◽  
Rupanagudi Suresh Kumar ◽  
Sikhakolli Ramakrishna ◽  
Venkatesh K.G. Kashyap
Keyword(s):  
Particle Size ◽  
Design Of Experiments ◽  
Analysis Of Variance ◽  
Inconel 718 ◽  
Wear Behavior ◽  
Erosive Wear ◽  
Taguchi Technique ◽  
Nacl Solution ◽  
Slurry Erosion ◽  
Wear Tests

The present work is aimed at investigating the effect of speed , slurry concentration and particle size on Inconel-718 coatings on copper subjected to slurry erosion with the help of DOE (design of experiments) tool among which the Taguchi technique is well known. The coatings are subjected to slurry erosive wear tests in 3.5% NaCl solution (35 gms NaCl/ ltr of water) with sand as erodent. On application of analysis of variance, it is found that all three parameters namely speed, sand concentration of the slurry and particle size are significant with speed being the most significant one.

Studies on Erosive Wear Behavior of UHMWPE-Filled Aramid–Epoxy Hybrid Composites

2012 ◽  
Vol 27 (4) ◽  
pp. 430-435 ◽  
Author(s):  
N. Mohan ◽  
S. Natarajan ◽  
S. P. Kumaresh Babu ◽  
S. Siddaramaiah ◽  
Joong Hee Lee
Keyword(s):  
Hybrid Composites ◽  
Wear Behavior ◽  
Erosive Wear

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.

Study of Slurry Erosive Wear Behavior of Titania-30 Wt% Inconel-718 Plasma Sprayed Mild Steel Using Taguchi Technique

2015 ◽  
Vol 813-814 ◽  
pp. 111-115
Author(s):  
C.S. Ramesh ◽  
R. Suresh Kumar ◽  
G. Dilip Maruthi ◽  
R. Rashmi
Keyword(s):  
Wear Resistance ◽  
Mild Steel ◽  
Wear Behavior ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Erosive Wear ◽  
Wear Test ◽  
Silica Sand ◽  
Slurry Erosion ◽  
Uncoated Sample

Surface coating is sharing the responsibility between coating and substrate, which enhances the surface properties such as strength, hot hardness and toughness, wear resistance, antifriction and chemical inertness. The present work is focused on wear behavior of Mild Steel substrate material deposited with Titanium dioxide-30 wt % of Inconel718 incorporating plasma spray process. These composite coatings were subjected to slurry erosion wear test by simulating the corrosive-erosive atmosphere by mixing of silica sand and 3.5 percent of NaCl in distilled water. Under identical conditions, coated mild steels gave better wear resistance compared to uncoated sample.

Slurry erosion performance of CeO2-modified Ni–WC coatings

2014 ◽  
Vol 66 (4) ◽  
pp. 533-537 ◽  
Author(s):  
Surajit Purkayastha ◽  
Dheerendra Kumar Dwivedi
Keyword(s):  
Erosion Resistance ◽  
Wear Behavior ◽  
Steel Substrate ◽  
Erosive Wear ◽  
Wear Test ◽  
Silica Sand ◽  
Slurry Erosion ◽  
Content Type ◽  
Sem Study ◽  
Erosion Test

Purpose – This paper aims to deal with the study of effect of cerium oxide (CeO2) modification on the sand slurry erosion resistance of Ni – tungsten carbide (WC) coatings. Design/methodology/approach – Flame-sprayed conventional and CeO2-modified Ni–WC coatings were developed on a mild steel substrate. Slurry erosion tests were carried out in an in-house-designed and fabricated pot-type slurry erosion test rig to evaluate wear behavior of conventional and modified coatings. The erosive wear test was conducted using 5 per cent silica sand slurry at 850 rpm. Findings – Modified coatings exhibited increased hardness as compared to the conventional coating. Slurry erosion resistance of most modified coatings was superior to that of the unmodified coating. Hardness of coating doped with 0.9 per cent CeO2 was highest among all coatings, and concomitantly this composition also showed the least wear. Scanning electron microscopy (SEM) revealed that microcutting was much less in the modified coating. Originality/value – Slurry erosion wear of Ni–WC flame-sprayed coatings in sand slurry media is substantiated by extensive SEM study.

Effect of Nano TiO2/Clay on the Erosive Wear Behavior of Basalt-Epoxy Hybrid Composites at Elevated Temperatures

2015 ◽  
Vol 813-814 ◽  
pp. 40-45 ◽  
Author(s):  
C R Mahesha ◽  
Shivarudraiah ◽  
C. Rajesh Chandra ◽  
R. Suprabha
Keyword(s):  
Impact Velocity ◽  
Erosion Rate ◽  
Elevated Temperatures ◽  
Hybrid Composites ◽  
Wear Behavior ◽  
Erosive Wear ◽  
Wear Test ◽  
Normal Incidence ◽  
Filler Concentration ◽  
The Impact

Materials added to the matrix help improving operating properties of a composite. In the last few years, nanofiller /polymer composite have been widely investigated because of their outstanding multifunctional properties. In order to improve the erosive wear resistance of composite, an attempt was made to use nanoTiO2 and nanoclay as filler for the basalt reinforced epoxy composite (BE). The impact velocity, filler concentration and temperature are the parameters used for the study. The composites were fabricated using vacuum assisted resin infusion technique (VARI) technique. The fabricated composite specimens were tested by using erosive wear test rig as per ASTM G76 under normal incidence. The result shows that the erosion rate increases with increase in temperature and impact velocity. However, nanoTiO2-filled BE composite exhibits lower erosion rate as compared to Nanoclay filled and unfilled composite. The morphology of eroded surfaces was examined by using scanning electron microscopy (SEM).

scholarly journals Homogenisation Efficiency Assessed with Microstructure Analysis and Hardness Measurements in the EN AW 2011 Aluminium Alloy

Metals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1211
Author(s):  
Maja Vončina ◽  
Aleš Nagode ◽  
Jožef Medved ◽  
Irena Paulin ◽  
Borut Žužek ◽  
...  
Keyword(s):  
Experimental Data ◽  
Image Analysis ◽  
Phase Equilibrium ◽  
Aluminium Alloy ◽  
Phase Formation ◽  
Aluminium Alloys ◽  
Eutectic Phase ◽  
The Matrix ◽  
Equilibrium Solidification ◽  
Homogenisation Process

When extruding the casted rods from EN AW 2011 aluminium alloys, not only their homogenized structure, but also their extrudable properties were significantly influenced by the hardness of the alloy. In this study, the object of investigations was the EN AW 2011 aluminium alloy, and the effect of homogenisation time on hardness was investigated. First, homogenisation was carried out at 520 °C for different times, imitating industrial conditions. After homogenisation, the samples were analysed by hardness measurements and further characterised by microscopy and image analysis to verify the influence of homogenisation on the resulting microstructural constituents. In addition, non-equilibrium solidification was simulated using the program Thermo-Calc and phase formation during solidification was investigated. The homogenisation process enabled more rounded shape of the Al2Cu eutectic phase, equilibrium formation of the phases, and the precipitation in the matrix, leading to a significant increase in the hardness of the EN AW 2011 aluminium alloy. The experimental data revealed a suitable homogenisation time of 4–6 h at a temperature of 520 °C, enabling optimal extrusion properties.

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