Study of Structural and Mechanical Properties of Al/Nano-Al2O3 Metal Matrix Nanocomposite Fabricated by Powder Metallurgy Method

2020 ◽  
Vol 73 (4) ◽  
pp. 1007-1013 ◽  
Author(s):  
Vilas Tiku ◽  
Kumar Navin ◽  
Rajnish Kurchania
2016 ◽  
Vol 5 (3) ◽  
pp. 241-249 ◽  
Author(s):  
Kalidindi Sita Rama Raju ◽  
Vegesna Ramachandra Raju ◽  
Penumetsa Rama Murty Raju ◽  
Siriyala Rajesh ◽  
Ghosal Partha

2016 ◽  
Vol 879 ◽  
pp. 1068-1073
Author(s):  
Han Joo Lee ◽  
Jae Kyung Han ◽  
Byung Min Ahn ◽  
Megumi Kawasaki ◽  
Terence G. Langdon

High-pressure torsion (HPT) is one of the major severe plastic deformation (SPD) procedures where disk metals generally achieve exceptional grain refinement at ambient temperatures. HPT has been applied for the consolidation of metallic powders and bonding of machining chips whereas very limited reports examined the application of HPT for the fabrication of nanocomposites. An investigation was initiated to evaluate the potential for the formation of a metal matrix nanocomposite (MMNC) by processing two commercial metal disks of Al-1050 and ZK60 magnesium alloy through HPT at room temperature. Evolutions in microstructure and mechanical properties including hardness and plasticity were examined in the processed disks with increasing numbers of HPT turns up to 5. This study demonstrates the promising possibility for using HPT to fabricate a wide range of hybrid MMNCs from simple metals.


Metals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 667 ◽  
Author(s):  
Danai Giannopoulou ◽  
Hajo Dieringa ◽  
Jan Bohlen

A pure Mg and a ZW0303 alloy metal matrix nanocomposite reinforced with AlN nanoparticles were prepared assisted by mechanical stirring and sonication for deagglomeration of particles. The produced nanocomposites were investigated to determine the influence of the AlN nanoparticles during indirect extrusion on the microstructure and texture development, as well as the resulting hardness and mechanical properties. For pure Mg, grain refinement and hardness increase due to the addition of AlN were revealed in the as-cast and the extruded condition. For ZW0303, the same was found for the as-cast condition. However, contamination of the alloy with Al significantly changes the recrystallization behavior during extrusion. This is directly related to the removal of solute Y due to the formation of intermetallic particles. Particle and grain size effects were distinguished for this alloy.


2021 ◽  
Vol 37 (5) ◽  
pp. 1062-1067
Author(s):  
Brindha T ◽  
Rathinam R ◽  
Dheenadhayalan S ◽  
Sivakumar R

Corrosion is one of the biggest problems which affects the economy of the country, which occurs as a result of the interaction of the metal with its surroundings. One of the easiest ways to prevent corrosion is coatings of the metals with paint, plastic or wood. Several types of coatings have been adopted by corrosion scientists in the prevention of corrosion that are mainly based on electrochemical principles. Fortunately, based on cost and effectiveness, four types of coatings are variably employed by the metal and metallurgy industries. One among the cheapest and effective way to prevent corrosion is to use barrier coatings like plastic, powder and paint. Hence, nanocomposite coatings by electrochemical deposition offers an excellent, scratch and corrosion resistance on the metal surface. These coatings may be used to restoration of the components instead of interchanging them, resulting in reduced maintenance costs and disturbance. Significant improvements in the corrosion protection of steel have been reported by using metal-metal matrix, metal-metal oxide matrix, metal-polymer matrix, and ceramic-metal matrix nanocomposite. This review presents an overview of works related to nanocomposite coatings and to re-evaluate the literature for the future research in the field that still lacks validation.


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