Journal of Research in Materials and Metallurgical Engineering

Authors:-Roopesh Kumar, Sonal rai

Abstract:-The interest in using natural fibres such as different plant fibres and wood fibres as reinforcement in plastics has increased. The importance of materials in modern world can be realized from the fact that much of the research is being done to apply new materials to different components. Today composite materials have changed all the material engineering. The evolution of composite materials has given an opportunity to various designers to use new and better materials resulting in cost reduction, increase in efficiency and better utilization of available resources. Composite materials are finding their applications in aerospace industry, automobile sector, manufacturing industries, etc.

Authors:-S. Sreeremya

Abstract:-Coconut palm (Cocos nucifera L.) is a member in the kingdom Plantae, division Magnoliophyta, class Liliopsida, order Arecales, family Arecaceae and it is broadly growing in tropical countries. The mature dehusked coconut usually possesses 50% wet meat or kernel, 33% shell and 17% water .Coconut husk and other cellulosic biomass as enormous nutrient value which can be used as a growth medium or as a proper substrate for mushroom cultivation.

Author: S. Sreeremya

Abstract:  In a developing country like India generation of waste is a major problem which makes serious negative impacts directly and indirectly to the environment. Food industry is one major field where enormous amount of waste is released each year. Organic load produced in the diary industries is in huge quantity. The major aim of the study is to understand the physicochemical analysis of diary effluents in the region of Palakkad.

Authors: S. Sreeremya, M.Flory Shobana

Abstract: My coremediation plays a crucial role in breaking down numerous toxic substances like petroleum hydrocarbons, polychlorinated biphenyls, heavy metals (by biosorption), phenolic derivatives, persistent pesticides etc. Fungi employs some of these hazardious compounds as the nutrient source and convert them to simpler segmented forms. Fungal treatment is lower in costs than the use of chemicals . Over the years, a number of organisms, in particular fungi, possessing cellulose-degrading enzymes have been isolated and researched for the coremediating activity. Biotechnological conversion of cellulosic biomass is potentially sustainable approach to develop new bioprocesses and products. Microbial cellulases have become the focal biocatalysts due to their complex nature and wide spread industrial applications.

Authors: Roopesh Sinha, Sonal Rai

Authors: Kamal B, Parthiban V, Moha Priya G, Malathi K

Abstract: Textile is a leading industry of every country because of necessity of clothes and a textile industry plays a vital role in the industrial sectors and it consume lots of water for their usage as well as they dispose equal amount of wastewater with toxic dye contents. When textile wastewater is disposed to natural system, it creates major impacts to human as well as natural environment such as human related diseases, pollution of natural system etc., So, it is necessary to treat them effectively for the purpose of protection of Environmental condition and also to save humans and animal life. The Ocimum Tenuiflorum (Tulsi) leaves extract arbitrated green synthesis of silver coated nanoparticles (AgNPs) was used as an adsorbent for dye removal. The Silver Nano particles (AgNP) is characterised by the Particle Size Analyser. The adsorbent material is added to the dye solution at different proportions and shaked well in a conical flask shaker at different rpm. A centrifuge shaker is used to settle down the floating materials. The sample is then tested for spectrophotometer to find the absorption value and removal efficiency. These nanocomposite were found to possess moderate removal efficiency in comparison with soil as an adsorbent in the removal of reactive dye. Furthermore, using these Silver nanocomposites as an adsorbent helped in achieving about 51% removal of the methyl orange reactive dye from the effluent solution.

Authors: S.Hemalatha, M Deepthi

Abstract: In the fast developing world, the concern for the environmental pollution and the prevention of non-renewable and non-biodegradable resources has attracted researchers seeking to develop new eco-friendly materials and products based on sustainability principles. The fibres from the natural sources provide indisputable advantages over synthetic reinforcement materials such as low cost, low density, non toxicity, comparable strength and minimum waste disposal problems. In order to optimize the cost of construction and to reduce the pollution which are caused by the manufacturing of cement concrete tile, natural fibre composite roofing tiles are playing a nominal role. In this context, coir fibre is considered to be suitable for this application. Coir is a green building material for the production of roofing materials like corrugated sheets and tiles. The main objective of this study is to produce cost effective tiles without compromising their quality by replacing cement up to 15% coir fibre.

Authors: D. Janaki Ramudu, Dr. T. Kiran Kumar, Dr. J. V. Gurumurthy

Abstract: Permeation grouting is an effective way to improve the engineering properties of the silty sand soil. In this technique the grout is injected into the ground without disturbing the soil structure. In this investigation an attempt is made to study the comparison of permeation grouting with cement and lime grout. The cement grout and lime grout are injected into the soil specimen by changing weight of cement and lime which will be at 2%, 4%, 6%, 8%, & 10% by the soil weight. Grouting is conducted in a tank of size 30 x 30 x 30cm. The grouted samples are tested in triaxial test after 1, 7, & 14 days of curing period. The permeability test also conducted on the grouted samples. The test results revealed that the shear strength properties are improved for grouted soil, where as the permeability is reduced.

Authors: Prashant Waydande, Nitin Ambhore, Chinchanikar and Dinesh Kamble

Abstract: 

This paper present an experimental study of hard turning with PVD coated carbide tool of AISI 52100 bearing steel, with the hardness of 45-47 HRC. The main purpose of given study is to establish the effect of cutting condition on cutting forces and surface roughness. The main focused on relationship between cutting parameter i.e. cutting speed , feed and depth of cut and machining output variables i.e. cutting forces and surface roughness through the response surface methodology i.e. central composite rotatable design. The effect of cutting parameters on machining output variables is to examine using analysis of variance (ANOVA). The quadratic model is drawn by using RSM which was used to find out most favorable machining parameters based on observed facts i.e. cutting forces and surface roughness. The machining of work piece material was conducted using super fine PVD coated carbide tool insert. Cutting forces were measured using lathe tool dynamometer and surface roughness was measured using Taylor hobson’s surtronic duo measuring instrument. It was found that at lower feed value, lower depth of cut value and cutting speed of 130m/min we get minimum value of cutting forces, surface roughness and tool wear.

Authors: S. Sandhya Rani, P. Suresh Praveen Kumar

Abstract: The primary application of various geotechnical construction techniques is for ground improvement. Many soil improvement methods have been developed due to the ongoing increase in urban and industrial growth and the need for greater access to lands. Stone columns are one of the best available techniques for soft soil improvement. In this method, subsurface soils which are weak and unstable are replaced with compacted dense aggregate columns that often entirely penetrate into the weak layers. This study deals with a short state-of-the art on the stone column ground improvement technique based on laboratory small scale model. Due to high permeability of the material component used in the stone columns, not only the load carrying capacity of the soil is raised, but also the soil settlement is reduced considerably and the post construction settlement is minimized. To achieve this goal, several significant characteristics of stone column in terms of design parameters are considered. This contribution, reports on small scale model tests for short time loading condition on column foundation, with special analysis for bearing and deformation behaviour of varying diameters of stone column in homogenous and layered soil. In the present work modifications to existing column technique proposed are carried out to evaluate the behaviour of stone column as Vertical reinforcement to improve bearing capacity of soft soils. The modification is in the form of introducing Stone Dust as a granular material. In addition to this the Encasement of grid is suggested for enhancing the load carrying capacity of the Stone Column.

Author: Dipjyoti Sarma

Abstract: The paper presents a probable low- cost alternative of conventional building materials which are very expensive in developing countries like India with special emphasis on Assam. The paper addresses various scope and challenges of using these materials as structural component for affordable housing and related infrastructures. The paper also discusses environmental and economical advantages of these alternative materials which can changes the demography of the construction industry. Also this paper aims to find a solution to alternate source of energy in rural areas and helps the same to become a smart village.

Authors: Paulson Varghese, Febin Joseph, Merrin John Varkey, Don Dominic, M. Pooja, V. Vijeesh and K. G. Samuel

Abstract: 

Aluminum-silicon alloy A356 was exposed to different durations at various solutionizing and ageing temperatures before and after strontium modification. The effect of Sr-modification on the microstructures and hardness were examined as a function of heat treatment parameters (temperature and time). The combination of Sr-modification and heat treatment increased the hardness of the alloy. The Sr-modification process also influenced the heat treatment parameters of the alloy as it decreased the solutionizing time by 4 hrs and increased the ageing time by 2 hrs to obtain the peak hardness. It was deduced that the modification favored the spheroidization of eutectic silicon to decrease the solutionizing time, however, the increase in ageing time was due to the interaction of modifiers with the Mg2Si precipitates.

Authors: A.T. Kamble, Prof. S.M. Shinde

Abstract: The spot weld is a very important structural joint used in different industries worldwide. An automobile body typically contains thousands of spot-welds. The finite element method (FEM) can be used to analyze spot welded components. Several models have been proposed in different literature to achieve this. However, there are still issues in the application of these models. Spot weld joint strength can be improved by using adhesives or modification in spot weld parameters. In this paper, experiment and FEA are performed by varying lap length and thickness of specimen.

Authors: M. A. I. Nahid, Mikihiko Oogane, Miho Watanabe, Hiroshi Naganuma, Yasuo Ando

Abstract: 

The ï´-phase MnAl films were epitaxially grown on MgO(100) substrate with CrRu buffer layer by dc sputtering. The magnetic and structural properties were studied systematically by varying the growth temperature. The films grown at 300oC possess higher magnetic anisotropy constant of about 2×106 erg/cc. The saturation magnetization obtained in that sample was about 470 emu/cc. The CrRu buffer layer and growth temperature plays an important role in the epitaxial growth of ï´-phase MnAl thin films. It is observed that there is a strong correlation between structural and magnetic properties of the MnAl film which can be tuned by the growth temperature.