venkata ramana Vsn

GITAM University | GITAM · Department of Mechanical Engineering

The wear rate of Al4Mg matrix composites reinforced with particulate of Al20Cu20Mg was inspected by means of the pin-on-disc apparatus. The composite materials were fabricated with 5, 10, and 15% of reinforcement of the high strength ternary alloy particulate (HSAp) in the Al4Mg alloy by means of stir casting followed by a hot-extrusion process. Th...

AA7075 is a candidate alloy which is extensively used in aerospace, defence and automobile applications due to its high strength, but key the problem associated with this alloy is low resistance towards corrosion. In this present investigation friction, stir processing technique was employed to modify the surface of AA7075 alloy. In the present wor...

In this present investigation, rotary friction welding has been used to join Ti64 rods. Different heat treatments namely α-β and β with stress-relieving (SR) were carried out before welding. After welding, corrosion studies were carried out in a 3.5% NaCl environment. It was observed that the α-β heat-treated condition with SR showed the least corr...

In this paper, nano nickel coating was made by pulsed electrodeposition technique to improve the surface properties of base metal. The developed nickel coating was characterized using SEM, Xrd, Vickers microhardness, Potentiodynamic polarization and ball on plate wear testing. X-ray diffraction studies shown that predominant (111) crystalline plane...

Titanium and its alloys are extensively used in automobile, aerospace and biomedical applications. There are many problems associated with the fusion welding of titanium. Thus, friction welding is an alternative technique for joining titanium without defects. In this study, Ti-6Al-4V (Grade 5 -Titanium alloy) rods were welded using a rotary frictio...

The present study investigated the wear behaviour of Al6061 alloy reinforced with nano zirconium dibor-ide (ZrB 2) particles. The Al6061 metal matrix nanocomposites (AMMNCs) werefabricated by the addition of ZrB 2 nanoparticles in various wt.% using stir casting route. Microstructure and XRD analysis was carried out on Al6061 alloy and fabricated c...

In a new approach, an excellent functionally graded Aluminium Metal Matrix Nano Composites (AMMNC)fabricating via Powder metallurgy (P/M) route using various nanomaterials reinforcementhaving high potential in a field of ordnance, petroleum, petrochemical, aerospace, and automobile industrial applications. In the present investigations,an attempt h...

Explosion welding is a solid-state welding process that is used for the metallurgical joining of similar and dissimilar combinations of metals and alloys with varying physical and mechanical properties. In this process the metal surfaces are brought into sufficiently close contact, the valence electrons overcome the repulsive forces and result in s...

AA2014 aluminium alloy is high strength and lightweight alloy that is extensively used in aerospace and various metallurgical industrial applications. AA2014, which is the second most popular of the AA2000 aluminium alloy series, is behind only AA2024 aluminium alloys. However, fusion welding of these alloys presents many challenges. Keeping these...

Aluminum matrix composites (AMCs) are extensively using in different fields such as defense automotive, marine, electronics and automobile sectors because of their impressive mechanical properties. This study aims to investigate the tribological and corrosion behavior of AA6061 alloy with the reinforcement of ilmenite (FeTiO3) particles. AA 6061-(F...

The dry sliding wear behaviour of Al4Mg binary alloy and Al4Mg reinforced with Al20Cu20Mg composites was examined using pin on disc apparatus. The composites were synthesized by the reinforcement of different weight % (5, 10 and 15) of the high strength alloy particulate (HSAp) in the base binary alloy Al4Mg using stir casting technique followed by...

High hardness and high temperature melting of tungsten is best utilized in the manufacture of electrode materials where high erosion due to discharge in high current carrying conductors. Usually, copper is added in the range of 20-45 % by weight and prepared by powder metallurgy methods. Similarly, copper based electrical contacts are also prepared...

A ternary alloy (Al20Cu20Mg) high strength metallic particulate was reinforced in a base matrix binary alloy of Al-4Mg to prepare a metal-metal composite. This was investigated for corrosion behaviour. High Strength Alloy particulate (HSAp) of non-uniform size from the ternary alloy was utilized with weight proportions of 5%, 10%, and 15% to prepar...

Dissimilar Aluminium alloy welding is becoming significant in aerospace, shipbuilding, and defence applications. The present work aims to study the microstructure and corrosion behavior of dissimilar aluminium alloy welds welded by using friction stir welding (FSW) process. It is also attempted in this work to study how post weld heat treatment (T4...

Stir casting process is an effective manufacturing technique for producing metal matrix composites. The extensively use reinforcing materials for the aluminum matrix composites are silicon carbide, aluminum oxide and graphite in the variety of particles. In this work, the effect of addition of SiC reinforcement on the microstructure, mechanical and...

In roller burnishing is process, a hard and highly polished roller is pressed against a rotating component. This results in the plastic flow of material from the peaks of surface irregularities into the valleys, thereby reducing the surface roughness. The pressure applied causes the cold working of the component’s surface which in turn improves mic...

Titanium alloys are widely used in aerospace, biomedical, and other engineering areas due to their superior properties. However, machining of titanium alloys has always been a challenge due to the high temperatures and tool wear rates. Dry machining has a limited range of permissible cutting conditions and is hence not suitable for industrial produ...

Cutting fluids have been used in machining for over two centuries. However, different environmental issues associated with them have limited their application. Although vegetable based cutting fluids are formulated, vegetable based emulsifier is not found in the literature. In the present work, cutting fluids containing both vegetable based emulsif...

Cutting fluids are popularly used for cooling and lubricating the machining zone. However, the hazardous effects of cutting fluids on the workers’ health limit their usage. Although different studies were carried out to replace mineral oils in cutting fluids using vegetable oils, replacement of mineral-based emulsifier was not considered. This work...

Corrosion is one of the detrimental phenomena that restricts the service period of components. It can be confined locally to form a pit and leads to intergranular cracks and progresses by anodic loss. Naval applications such as ships, submarines and automobile sectors are always prone to failure because of corrosion. Even though aluminium alloys po...

Cutting fluids are widely used in machining. However they pose several health and environmental issues. Several works on vegetable-based cutting fluids have been reported in literature but the prime focus of these works was the replacement of mineral oil with vegetable oil while the emulsifier, which is often the root-cause of all these issues, was...