Dry Sliding Tribological Behavior of Al7010/B4C/BN Hybrid Metal Matrix Nanocomposites Prepared by Ultrasonic-Assisted Stir Casting

2020 ◽  
Author(s):  
Gopichand Dirisenapu ◽  
Lingaraju Dumpala ◽  
Seelam Pichi Reddy
Keyword(s):  
Metal Matrix ◽  
Tribological Behavior ◽  
Stir Casting ◽  
Dry Sliding ◽  
Metal Matrix Nanocomposites ◽  
Ultrasonic Assisted ◽  
Ultrasonic Assisted Stir Casting ◽  
Hybrid Metal Matrix Nanocomposites ◽  
Matrix Nanocomposites

Ultrasonication Assisted Fabrication of Aluminum and Magnesium Matrix Nanocomposites - A Review

2020 ◽  
Vol 979 ◽  
pp. 63-67
Author(s):  
K. Parthiban ◽  
Lakshmanan Poovazhgan
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix ◽  
Casting Process ◽  
Ultrasonic Cavitation ◽  
Solidification Processing ◽  
Magnesium Matrix ◽  
Metal Matrix Nanocomposites ◽  
Ultrasonic Assisted ◽  
Agglomeration Of Nanoparticles ◽  
Matrix Nanocomposites

Recent researches in the domain of casting confirmed that the mechanical properties of aluminum and magnesium based nanocomposites can be appreciably enhanced when ultrasonic cavitation assisted solidification processing is used. Ultrasonic cavitation assisted solidification processing is used for the manufacturing of aluminum and magnesium alloy based metal matrix nanocomposites reinforced with nanoceramic particles. In this solidification processing, formation of clusters have been minimized and the nanoreinforcements were distributed uniformly in aluminum and magnesium matrix nanocomposites. The ultrasonic assisted casting approach will manage the grain dimensions via minimizing agglomeration of nanoparticles in metal matrices. This paper opinions the properties and morphology of aluminum and magnesium based metal matrix nanocomposites fabricated through ultrasonic assisted casting process.

scholarly journals Metal matrix nanocomposites in tribology: Manufacturing, performance, and mechanisms

Friction ◽  
2022 ◽  
Author(s):  
Shuaihang Pan ◽  
Kaiyuan Jin ◽  
Tianlu Wang ◽  
Zhinan Zhang ◽  
Long Zheng ◽  
...  
Keyword(s):  
Smart Materials ◽  
Metal Matrix ◽  
Tribological Behavior ◽  
Quantitative Description ◽  
Tribological Performance ◽  
Coating Materials ◽  
Metal Matrix Nanocomposites ◽  
The Coefficient Of Friction ◽  
Characteristic Features ◽  
Matrix Nanocomposites

AbstractMetal matrix nanocomposites (MMNCs) become irreplaceable in tribology industries, due to their supreme mechanical properties and satisfactory tribological behavior. However, due to the dual complexity of MMNC systems and tribological process, the anti-friction and anti-wear mechanisms are unclear, and the subsequent tribological performance prediction and design of MMNCs are not easily possible: A critical up-to-date review is needed for MMNCs in tribology. This review systematically summarized the fabrication, manufacturing, and processing techniques for high-quality MMNC bulk and surface coating materials in tribology. Then, important factors determining the tribological performance (mainly anti-friction evaluation by the coefficient of friction (CoF) and anti-wear assessment with wear rate) in MMNCs have been investigated thoroughly, and the correlations have been analyzed to reveal their potential coupling/synergetic roles of tuning tribological behavior of MMNCs. Most importantly, this review combined the classical metal/alloy friction and wear theories and adapted them to give a (semi-)quantitative description of the detailed mechanisms of improved anti-friction and anti-wear performance in MMNCs. To guarantee the universal applications of these mechanisms, their links with the analyzed influencing factors (e.g., loading forces) and characteristic features like tribo-film have been clarified. This approach forms a solid basis for understanding, predicting, and engineering MMNCs’ tribological behavior, instead of pure phenomenology and experimental observation. Later, the pathway to achieve a broader application for MMNCs in tribo-related fields like smart materials, biomedical devices, energy storage, and electronics has been concisely discussed, with the focus on the potential development of modeling, experimental, and theoretical techniques in MMNCs’ tribological processes. In general, this review tries to elucidate the complex tribo-performances of MMNCs in a fundamentally universal yet straightforward way, and the discussion and summary in this review for the tribological performance in MMNCs could become a useful supplementary to and an insightful guidance for the current MMNC tribology study, research, and engineering innovations.

scholarly journals Microstructure evolution, mechanical properties, and fractography of AA7068/ Si3N4 nanocomposite fabricated thorough ultrasonic-assisted stir casting advanced with bottom pouring technique

2022 ◽  
Author(s):  
Ashish Kumar ◽  
R. S. Rana ◽  
Rajesh Purohit
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Fine Particles ◽  
Base Alloy ◽  
High Strength ◽  
Stir Casting ◽  
Microstructural Investigation ◽  
Metal Matrix Nanocomposites ◽  
Ultrasonic Assisted ◽  
Ultrasonic Assisted Stir Casting

Abstract Ceramic particulate embedded aluminum metal matrix nanocomposites (AMNCs) possess superior mechanical and surface properties and lightweight features. AMNCs are a suitable replacement of traditional material, i.e., steel, to make automotive parts. The current work deals with developing Si3N4 strengthened high strength AA7068 nanocomposites via novel ultrasonic-assisted stir casting method advanced with bottom pouring setup in the proportion of 0.5, 1.0, 1.5, and 2 wt.%. Planetary ball milling was performed on a mixture of AA7068 powder and Si3N4 (in the proportion of 3:1) before incorporation in aluminum alloy melt to avoid rejection of fine particles. Finite element scanning electron microscope (FESEM), Energy dispersive spectroscopy (EDS), X-Ray diffraction (XRD), and Elemental mapping techniques were used in the microstructural investigation. Significant grain refinement was observed with increasing reinforcing content, whereas agglomeration was found at higher weight %. Hardness, Tensile strength, ductility, porosity content, compressive strength, and impact energy were also examined of pure alloy and each composite. Improvement of 72.71%, 50.07%, and 27.41 % was noticed in hardness value, tensile strength, and compressive strength, respectively, at 1.5 weight % compared to base alloy because of various strengthening mechanisms. These properties are decreased at 2wt.% due to severe agglomeration. In contrast, nanocomposite's ductility and impact strength continuously decrease compared to monolithic AA7068. Fracture analysis shows the ductile and mixed failure mode in alloy and nanocomposites.

Challenges in Manufacturing Aluminium Based Metal Matrix Nanocomposites via Stir Casting Route

2012 ◽  
Vol 736 ◽  
pp. 72-80 ◽  
Author(s):  
Subhranshu Chatterjee ◽  
Amitava Basu Mallick
Keyword(s):  
Metal Matrix ◽  
Settling Velocity ◽  
Strengthening Mechanism ◽  
Stir Casting ◽  
Theoretical Concepts ◽  
Metal Matrix Nanocomposites ◽  
Theoretical Predictions ◽  
Matrix Nanocomposites ◽  
Grain Refinement Strengthening

The influence of material processing conditions for preparing aluminium based metal matrix nanocomposites through stir casting route is reviewed. The role of particle size with respect to Brownian motion, Stokes settling velocity and strengthening mechanism is assessed from theoretical understandings. Variation of microstructural features and mechanical properties of the nanocomposites are predicted from theoretical concepts and related mathematical models. Experiments conducted to validate the theoretical predictions show that both Orowan and grain refinement strengthening mechanisms remain operative which is the key to the improved strength property of the nanocomposites.

Exploration of Properties of Al 6060/CNT Metal Matrix Nanocomposites

2021 ◽  
Vol 903 ◽  
pp. 133-140
Author(s):  
B. Madhusudhana Reddy ◽  
S.P. Akbar Hussain ◽  
K. Raja Sekhar ◽  
P. Anand
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix ◽  
Casting Process ◽  
Stir Casting ◽  
Metal Matrix Nanocomposites ◽  
Weight Percentage ◽  
Mechanical Parts ◽  
Manufacturing Sectors ◽  
Experimental Values ◽  
Matrix Nanocomposites

Nowadays the use of composites in all most all manufacturing sectors is developing rapidly and is likely to increase more rapidly shortly. Aluminum alloy is playing a greater role in all engineering fields. Modern mechanical parts require superior properties, the material available in pure form do not have the required mechanical properties such as strength, hardness, corrosion resistance, etc. A Composite is formed by two or more physically and chemically distinct substances and which is fabricated to enhance the distinctiveness of base metal. The Present work has focused on properties of Carbon nanoTubes (CNTs) reinforced aluminum metal matrix Al 6060; Nanocomposites. These Nanocomposites are fabricated by using the stir casting method by varying the CNT reinforcement with a multi-walled size 10 to 15 nm weight percentage (0.3%, 0.7%, and 1%) of the Al 6060 matrix. To study its properties, the fabricated specimens are tested for mechanical properties. The properties of the Nanocomposites are found to be greatly influenced by the increase in weight percentage of reinforcement. With the mixing of different weight proportion reinforced particles by stir casting process properties of Tensile, Flexural, Impact, and hardness strength of composites are increased. The experimental values obtained from tests more useful in the development of Nanocomposites for different applications.

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