Gurunagendra GR Ramachandra

• Ph.D
• Professor (Associate) at Global Academy of Technology

The mechanical characteristics of graphene and coconut shell ash (CSA) particles added to aluminium 6061 metal matrix composites (MMC) are examined in this work. In the process of fabricating composites, stir casting is used, with CSA fluctuations ranging from 0 to 8% and a constant graphene content of 0.6%. Scanning electron microscopy (SEM) micro...

Stir casting was used to prepare ZA-27 hybrid composites with weight fractions of 1.5 wt%, 3.0 wt%, 4.5 wt%, and 6.0 wt% of primary reinforcement zirconium silicate and 3 wt% MoS2. Morphological structure, density, and void fraction of ZA-27 hybrid composites are found. The effect of zirconium silicate particles as reinforcement, as well as the fab...

Metal matrix composites are the promising materials for highly demanding engineering applications. This paper deals with the fabrication of ZA-27 composites by stir casting and evaluation of tribological properties of ZA-27 alloy reinforced with 1.5 wt. % to 6.0 wt. % in the space of 1.5 wt. % zircon sand using pin on disc tribometer. The composite...

This paper investigated the effects of process parameters such as burn off distance, oscillating frequency, and forging pressure on linear friction welding of commercially pure aluminium. Friction welding (FW) techniques are a group of techniques that are based on frictional heat between components that occurs during movement while under pressure....

Engineering components that can be modeled as a rotating disc include the rotor of a turbine engine, saw blades, grinding wheels, and computer magnetic recording disks etc. The rotating disc is subjected to centrifugal force which tends to pull the disc in radial direction, introduces large stresses and displacements on the disc. Further the disc i...

In the present work formulation of the stiffness matrix is carried out for laminated composites Envelope and core angles are taken with three plies with core thickness and envelope thickness varied for cantilever beam widely used in Aircraft structures. The natural frequency of the structure was found using the stiffness formulated for different or...

In the area of VLSI design, the focus is on reducing delays, power consumption and space, and improving speed. This paper presents the design of 32-bit modified-HSCSA using parallel prefix adder in which the basic design is based on Binary to Excess-1 Converter (BE1C) and also handouts brief review on traditional techniques used in standard BE1C, B...

During the last few years, ZA-27 alloys are commercially used as a bearing material due to their excellent tribological properties. This alloy also possesses advantages like good mechanical properties, low energy consumption, and ease of machining. It is found that ZA-27 alloys lose their dimensional stability above 100 �C during its usage. This ha...

Zinc-Aluminum alloys are employed as a bearing material in various machinery. In the present work zircon sand microparticles of size, 100 µm are dispersed in ZA-27 alloy with weight fractions of 1.5 wt%, 3.0 wt%, 4.5 wt%, and 6.0 wt% to synthesize ZA-27 metal matrix composites by stir casting. Microstructure studies using, SEM/EDAX conducted to det...

In the present work stir casting route is used to fabricate the ZA27 Metal matrix composites containing 3 wt%, 6 wt%, 9 wt%, and 12 wt%. Zircon sand particulates of size 100 mesh. Microstructure studies using Optical Microscopy, SEM-EDAX are carried out to ascertain the distribution and morphology of particulates in the composites. Effect of zircon...

This paper has carried out characterization and dry sliding wear of ZA alloy composites reinforced with solid lubricants like graphite microparticles and zinc oxide nanoparticles to enhance the wear properties of ZA-Nano composite. ZA composite samples were fabricated using Nano ZnO and micro graphite particulates (50-60 microns) by stir casting te...