Dry Sliding Wear and Corrosion Behaviour of Al-Based Hybrid Composites Reinforced with Micro-Tip and Micro/Nano-Al2O3p

2015 ◽  
Vol 69 (6) ◽  
pp. 1155-1167 ◽  
Author(s):  
Shanta Mohapatra ◽  
Anil Kumar Singh Bankoti ◽  
Ashok Kumar Mondal ◽  
Arunachalam Thirugnanam
2021 ◽  
Vol 9 (4) ◽  
pp. 045046
Author(s):  
Chandrashekar A ◽  
V Mohanavel ◽  
Abdul Razak Kaladgi ◽  
Vinod Kumar R ◽  
M Ravichandran ◽  
...  

Abstract Aluminum matrix composites were extensively used as structural material as it possesses good surface properties such as wear and corrosion resistance. The practical importance of nano particles in composite materials has triggered widespread attention towards the enhancement of its properties. In this study, Al-Mg/Al2O3 (0–8 wt%) metal matrix nano composites fabricated by two step stir casting route was investigated to comprehend its wear and corrosion behaviour. The Pin-on-Disc dry sliding wear test was performed on Al-Mg/Al2O3 (0–8 wt%) by adopting Design of Experiments under the action of different contact loads and sliding distance following the ASTM G99 Standard. The experimental results conveyed that specific wear rate decreases with increase in sliding distance. Statistical analysis was performed by Taguchi’s Technique and Analysis of Variance (ANOVA) to determine the most dominating factor that influences specific wear rate for the optimum weight percentage of reinforcement. Analysis revealed adequacy with the constructed model in predicting the wear behavior of composite and unreinforced Al-Mg alloy. The corrosion behaviour of the base alloy and composites was analysed by static immersion and electrochemical assessments, by immersing prepared specimens in aqueous sodium chloride (3.5%) solution. The dependance of corrosion rate of the composites with the weight percentage of Al2O3, exposure duration and temperature of the corrosive medium was studied in detail. Corrosion test results exhibit that corrosion rate decreases with increase in weight percentage of Al2O3 particles and exposure duration, whereas it follows reverse trend with increase in corrosion medium temperature.


2012 ◽  
Vol 710 ◽  
pp. 276-281
Author(s):  
Aditya K. Padap ◽  
Gajanan P. Chaudhari ◽  
Sameer K. Nath

As ultrafine grained (UFG) steels obtained by severe plastic deformation (SPD) are useful for structural purposes and micro devices, it is necessary to establish the relation of microstructure with wear and corrosion properties. Very few studies are available that correlate the microstructural changes and the mechanical properties of UFG steels to the degradation phenomena such as wear and corrosion. In present work a HSLA steel was severely deformed by warm (500°C) multiaxial forging (MAF) technique using up to nine strain steps. Submicron sized grain size was obtained after warm MAF. The hardness and strength improved significantly. The MAF processed UFG HSLA steel did not show any improvement in wear resistance. Low pull-off-work and fragmented nanosized pearlitic cementite particles were the two factors found responsible for it. The corrosion resistance of HSLA steel after warm MAF remained largely unaffected.


2015 ◽  
Vol 90 ◽  
pp. 148-156 ◽  
Author(s):  
O. Carvalho ◽  
M. Buciumeanu ◽  
S. Madeira ◽  
D. Soares ◽  
F.S. Silva ◽  
...  

Author(s):  
R. Soundararajan ◽  
A. Sathishkumar ◽  
S. Sivasankaran ◽  
G. Shanthosh ◽  
S. Karthik

2017 ◽  
Vol 140 (2) ◽  
Author(s):  
Vineet Tirth

AA2218–Al2O3(TiO2) composites are synthesized by stirring 2, 5, and 7 wt % of 1:2 mixture of Al2O3:TiO2 powders in molten AA2218 alloy. T61 heat-treated composites characterized for microstructure and hardness. Dry sliding wear tests conducted on pin-on-disk setup at available loads 4.91–13.24 N, sliding speed of 1.26 m/s up to sliding distance of 3770 m. Stir cast AA2218 alloy (unreinforced, 0 wt % composite) wears quickly by adhesion, following Archard's law. Aged alloy exhibits lesser wear rate than unaged (solutionized). Mathematical relationship between wear rate and load proposed for solutionized and peak aged alloy. Volume loss in wear increases linearly with sliding distance but drops with the increase in particle wt % at a given load, attributed to the increase in hardness due to matrix reinforcement. Minimum wear rate is recorded in 5 wt % composite due to increased particles retention, lesser porosity, and uniform particle distribution. In composites, wear phenomenon is complex, combination of adhesive and abrasive wear which includes the effect of shear rate, due to sliding action in composite, and abrasive effect (three body wear) of particles. General mathematical relationship for wear rate of T61 aged composite as a function of particle wt % load is suggested. Fe content on worn surface increases with the increase in particle content and counterface temperature increases with the increase in load. Coefficient of friction decreases with particle addition but increases in 7 wt % composite due to change in microstructure.


Author(s):  
P. Ravindran ◽  
M. Jinnah Sheik Mohamed ◽  
S. Joe Patrick Gnanaraj ◽  
M. Appadurai

2016 ◽  
Vol 2 ◽  
pp. S12-S24 ◽  
Author(s):  
V.V. Monikandan ◽  
M.A. Joseph ◽  
P.K. Rajendrakumar

Author(s):  
Madeva Nagaral ◽  
V Auradi ◽  
K I Parashivamurthy ◽  
B K Shivananda ◽  
S A Kori

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