Mechanical behavior of Al-matrix nanocomposites produced by stir casting technique

2018 ◽  
Vol 5 (13) ◽  
pp. 26873-26877 ◽  
Author(s):  
V. Mohanavel ◽  
S. Suresh Kumar ◽  
K. Mariyappan ◽  
P. Ganeshan ◽  
T. Adithiyaa
Keyword(s):  
Mechanical Behavior ◽  
Stir Casting ◽  
Casting Technique ◽  
Matrix Nanocomposites ◽  
Al Matrix

Experimental Investigation on Mechanical and Wear Properties of Al7075-B4C-TiO2 Composite

2018 ◽  
Vol 23 ◽  
pp. 17-23
Author(s):  
M. Ganesh ◽  
D. Srinivasan ◽  
Naren Vivekanandan
Keyword(s):  
Metal Matrix ◽  
High Strength ◽  
Stir Casting ◽  
Pure Aluminium ◽  
Light Weight ◽  
Matrix Composites ◽  
Wear Properties ◽  
Casting Technique ◽  
Double Shear ◽  
Al Matrix

Hybrid metal matrix composites are being widely investigated for use in light weight, high strength applications. In the present study, Aluminium alloy Al7075 was reinforced with B4C and TiO2at 4% and 2% weight fractions respectively. The powders of the reinforcements were ball milled for uniform distribution in the Al matrix, and later fabricated by stir casting technique primarily due to simplicity and economy of the method. The specimen were prepared as per ASTM standards and later subjected to hardness, double shear, wear and impact tests and the results were compared with that of pure aluminium specimen fabricated by the same method. The hardness, shear strength, impact strength of the composite were found to be higher than pure aluminium by 4.97%, 32.28% ands 6.41% respectively.

Influence of nano-sized Al2O3 reinforcements on the mechanical behavior of the Al7075 composites

2021 ◽  
Vol 13 ◽  
Author(s):  
M S Prashanth Reddy ◽  
H P Raju ◽  
Nagaraj R Banapurmath ◽  
Vinod Kumar V Meti ◽  
Arun Y Patil
Keyword(s):  
Mechanical Behavior ◽  
Structural Engineering ◽  
Matrix Material ◽  
High Strength ◽  
Stir Casting ◽  
Nano Particles ◽  
Homogeneous Distribution ◽  
Weight Percentage ◽  
Casting Technique ◽  
Al2o3 Particles

Aims: Al7075 is a well-defined alloy for its excellent physical and mechanical behavior such as high strength, toughness, and low density. To reach the expectations of the automobile and aerospace applications, the properties of Al7075 alloy has to be improved by reinforcing nano-sized Al2O3 particles. Objectives: Synthesis and characterization of the Al7075 alloy reinforced with Al2O3 nano particles for different structural engineering applications. Methods: In this present work, nano-sized Al2O3 particles were added and dispersed homogeneously using a stir casting technique. AA7076/Al2O3 composites were prepared by varying wt.% percent of Al2O3 reinforcement particles (0.75, 1, 1.25, 1.5. 1.75 and 2 wt.% (weight-percentage)). Results: The SEM micrographs reveal the homogeneous distribution of Al2O3 reinforcements along the grain boundaries of the Al7075 matrix material. The experimental test results showed that the addition of Al2O3 reinforcements, the mechanical properties of the Al7075/Al2O3 composite, improved as compared to the Al7075 matrix material. Conclusion: The composite with 1.5 wt.% Al2O3 showed higher strength and hardness as compared to other reinforcements.

Distinct heat treatments and powder size ratios affecting mechanical responses of Al/Si/Cu composites

2021 ◽  
pp. 002199832110293
Author(s):  
Luz M Satizabal ◽  
Heloisa FN Caurin ◽  
Yuri A Meyer ◽  
Giovana S Padilha ◽  
Ausdinir D Bortolozo ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Mechanical Behavior ◽  
Deleterious Effect ◽  
Stir Casting ◽  
Heat Treatments ◽  
Powder Size ◽  
Mechanical Responses ◽  
Si Content ◽  
Mechanical Strengths ◽  
Al Matrix

The aim in this investigation is focused on the evaluation of two distinctive powder size ratios of pure elements (Al, Si and Cu) powders. Heat treatments (T4 and T6) affecting the mechanical strengths of Al/Si/Cu composites are also investigated. The novelty concerns to pure elements to constituting the composites and no melting or stir casting route are used. It is found that the densifications and tensile strengths are similar when distinct powder size ratios are used. It is also found that T4 and T6 treatments increases and decreases the mechanical strengths, respectively. The Si content indicates a deleterious effect in mechanical behavior. The T6 aging provides θ-Al2Cu incoherent with Al matrix, and the compressive strength is decreased. This suggests that the examined Al/Cu composites (using pure powders) are potential materials considering economical and environmentally friendly aspects.

scholarly journals A simple stir casting technique for the preparation of in situ Fe-aluminides reinforced Al-matrix composites

2016 ◽  
Vol 8 ◽  
pp. 529-532 ◽  
Author(s):  
Susanta K. Pradhan ◽  
Subhranshu Chatterjee ◽  
Amitava Basu Mallick ◽  
Debdulal Das
Keyword(s):  
Stir Casting ◽  
Matrix Composites ◽  
Casting Technique ◽  
Al Matrix Composites ◽  
Al Matrix

scholarly journals Tribological characterisation of magnesium matrix nanocomposites: A review

2021 ◽  
Vol 13 (4) ◽  
pp. 168781402110090
Author(s):  
Sudip Banerjee ◽  
Prasanta Sahoo ◽  
J Paulo Davim
Keyword(s):  
Weight Ratio ◽  
High Strength ◽  
Stir Casting ◽  
Tribological Behaviour ◽  
Magnesium Matrix ◽  
Friction Stir ◽  
Wear Friction ◽  
Melt Deposition ◽  
Mechanical And Tribological Characteristics ◽  
Matrix Nanocomposites

Magnesium matrix nanocomposites (Mg-MNCs) are high grade materials widely used in aerospace, electronics, biomedical and automotive sectors for high strength to weight ratio, excellent sustainability and superior mechanical and tribological characteristics. Basic properties of Mg-MNCs rely on type and amount of reinforcement and fabrication process. Current study reviews existing literatures to explore contribution of different parameters on tribological properties of Mg-MNCs. Effects of particle size and amount of different reinforcements like SiC, WC, Al2O3, TiB2, CNT, graphene nano platelets (GNP), graphite on tribological behaviour are discussed. Incorporation of nanoparticles generally enhances properties. Role of different fabrication processes like stir casting (SC), ultrasonic treatment casting (UST), disintegrated melt deposition (DMD), friction stir processing (FSP) on wear and friction behaviour of Mg-MNCs is also reviewed. Contributions of different tribological process parameters (sliding speed, load and sliding distance) on wear, friction and wear mechanism are also examined.

Studies on mechanical property and wear behaviour of AA7075 hybrid composites prepared by a conventional casting method

2021 ◽  
pp. 095440892110349
Author(s):  
V Vignesh Kumar ◽  
K Raja ◽  
T Ramkumar ◽  
M Selvakumar ◽  
TS Senthil Kumar
Keyword(s):  
Boron Nitride ◽  
Boron Carbide ◽  
Hybrid Composites ◽  
Stir Casting ◽  
Wear Behaviour ◽  
Tensile Behaviour ◽  
Wear Properties ◽  
Casting Technique ◽  
Reciprocating Wear ◽  
Sliding Distance

The research article addresses the reciprocating wear behaviour of hybrid AA7075 reinforced with boron carbide and boron nitride through a stir-casting technique. The experiment involved varying wt.% of the secondary particle boron carbide (3, 6 and 9) while boron nitride (3) was kept as constant. The hybrid composites were characterised using scanning electron microscopy coupled with energy dispersive spectroscopy. The hardness and tensile behaviour of the hybrid composites were evaluated. Reciprocating wear behaviour of the hybrid composites were examined using a tribometer by varying the wear parameters such as load and sliding distance. The results revealed that AA7075/6boron carbide/3boron nitride had better hardness, tensile and wear properties. The surface morphology of the wear samples was analysed using SEM.

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