Selection of Insulation Material for Solar Food Grain Disinfection System by Weighted Property Method

Volume 5 Issue 1 April - June 2017

Research Paper

Selection of Insulation Material for Solar Food Grain Disinfection System by Weighted Property Method

Sandeep D.V.*, Ullas U.**, Tej Kiran G.K.***, Valleesh B.V.****, Kiran Kumar P.*****

*-**** UG Student, Department of Mechanical Engineering, SJB institute of Technology, Bangalore, India.

***** Professor, Department of Mechanical Engineering, SJB institute of Technology, Bangalore, India.

Sandeep, D.V., Ullas, U., Kiran, G.K.T., Valleesh, B.V., and Kumar, P.K. (2017). Selection of Insulation Material for Solar Food Grain Disinfection System by Weighted Property Method. i-manager’s Journal on Material Science, 5(1), 9-13. https://doi.org/10.26634/jms.5.1.13481

Abstract

The Solar disinfection system uses solar energy to disinfect food grains, by removing the moisture content present in them. This aids their preservation for a long term. A mixed mode solar dryer uses a combination of direct solar drying and hot air drying, for maximum efficiency. It is observed that, some amount of this energy is lost, through conduction in the collector body. This is avoided with the use of insulators. Different types of heat insulating materials are available. This study uses the weighted property method to decide among the various alternatives of insulating material, which is suitable for the mentioned project. Here various parameters of insulator material selection are applied and their Relative Emphasis Coefficient, Scaled Property, and Ranks (or weights) are calculated. The material with a rank of unity gets the utmost preference, and the subsequent materials are preferred in the obtained order. The tangible parameters considered in this study are: Density, Thermal conductivity, Maximum service temperature range, Specific heat capacity, and cost. In this study, Rock mineral wool, with a performance of 84.58%, was selected as the suitable material. This can be applied in the mentioned project as an insulation material, after considering other intangible factors.

Synthesis and Characterization of Heterogeneous Reusable Green Catalyst by Anchoring Metal Complex onto Phosphotungstic Acid and Study of its Catalytic Study

Volume 5 Issue 1 April - June 2017

Research Paper

Synthesis and Characterization of Heterogeneous Reusable Green Catalyst by Anchoring Metal Complex onto Phosphotungstic Acid and Study of its Catalytic Study

Shiva Arun*, Amreen Naz**, Shahid Suhail Narvi***, Narendra Deo Pandey****

*-** Research Scholar, Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad, India.

***-**** Professor, Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad, India.

Arun, S., Naz, A., Narvi, S. S., and Pandey, N.D. (2017). Synthesis and Characterization of Heterogeneous Reusable Green Catalyst by Anchoring Metal Complex onto Phosphotungstic Acid and Study of its Catalytic Study. i-manager’s Journal on Material Science, 5(1), 1-8. https://doi.org/10.26634/jms.5.1.13480

Abstract

The organic-inorganic hybrid consisting of cobalt complex attached to Keggin type phosphotungstic acid (H3PW12O40), by ionic interaction was synthesized and characterized by FT-IR (Fourier Transform Infrared), elemental analysis, SEM (Scanning Electron Microscope), EDX (Energy Dispersive X-ray Analysis), powder-XRD (X-Ray Diffraction), and DRUV-Vis. The synthesized cobalt complex [Co(ethyldm)3]Cl2 (where ethyldm=ethylenediamine) was immobilized by phosphotungstic acid (H3PW12O40) in solvothermal condition, thus synthesizing a new organic-inorganic hybrid [Co(ethyldm)3(HPW12O40)]. The [Co(ethyldm)3]Cl2 and [Co(ethyldm)3(HPW12O40)] were studied for their catalytic activity for oxidative conversion of 1,2,3,4-tetrahydronaphthalene (tetralin). The hybrid [Co(ethyldm)3(HPW12O40)] was used multiple times to catalyse the substrate. The catalytic activity of [Co(ethyldm)3]Cl2 and [Co(ethyldm)3(HPW12O40)] as heterogeneous catalyst were monitored by  Gas Chromatography (GC) and the products formed during catalysis were analyzed by Mass Spectroscopy (MS).

Optimization of Control Parameters for Mechanical and Abrasive Wear Behavior of Graphite Filled Carbon Epoxy Composite using Grey Relational Analysis

Volume 4 Issue 4 January - March 2017

Research Paper

Optimization of Control Parameters for Mechanical and Abrasive Wear Behavior of Graphite Filled Carbon Epoxy Composite using Grey Relational Analysis

Sudarshan Rao K.*, Y.S. Varadarajan**, N. Kiran Bhat***

* Professor and Head, Department of Mechanical Engineering, Shri Madhwa Vadiraja Institute of Technology and Management, Karnataka, India.

** Professor, Department of Industrial and Production Engineering, NIE, Karnataka, India.

*** Assistant Professor, Department of Mechanical Engineering, Shri Madhwa Vadiraja Institute of Technology and Management, Karnataka, India.

Rao, K. S., Varadarajan, Y. S., and Bhat, N. K. (2017). Optimization of Control Parameters for Mechanical and Abrasive Wear Behavior of Graphite Filled Carbon Epoxy Composite using Grey Relational Analysis. i-manager’s Journal on Material Science, 4(4), 31-42. https://doi.org/10.26634/jms.4.4.10373

Abstract

Mechanical and tribological behaviors of graphite filled carbon fabric reinforced epoxy composite were investigated in the present study. Three body abrasive wear tests were conducted with four process parameters, filler content, normal load, abrading distance, and abrasive particle size. Grey Relational Analysis is used to optimize the multi performance characteristics to minimize the specific wear rate and density, and to maximize the tensile, flexural and impact strength of graphite filled carbon epoxy composite. The experiments were designed according to Taguchi's L orthogonal array 9 to optimize experimental runs. The results indicated that tensile, flexural and impact strength, and the specific wear rate of composite increased with increase in graphite filler content. Analysis of variance was applied to determine the parametric influence on the performance output. From the ANOVA it is observed that, graphite filler content has the most significant factor influencing the mechanical and wear behavior of composites. An optimized parameter combination was obtained by grey relational analysis. Finally, a confirmation test was performed according to predicted optimal parameter setting and found the successful implementation of grey based Taguchi approach.

Mechanical Characterization and Microstructure Exploration of the Aluminum-Tungsten Carbide-Cobalt Composites

Volume 4 Issue 4 January - March 2017

Research Paper

Mechanical Characterization and Microstructure Exploration of the Aluminum-Tungsten Carbide-Cobalt Composites

Ch.Siva RamaKrishna*

*Associate Professor, Department of Mechanical Engineering, Vignan's Institute of Information Technology, Andhra Pradesh, India.

RamaKrishna, C. S. (2017). Mechanical Characterization and Microstructure Exploration of the Aluminum-Tungsten Carbide-Cobalt Composites. i-manager’s Journal on Material Science, 4(4), 25-30. https://doi.org/10.26634/jms.4.4.10369

Abstract

The demand in usage of advanced material in lightweight Aluminum (Al) has increased drastically in the present, especially in automobile and aerospace applications. Aluminium based Metal Matrix Composites (MMCs) has its own advantage that it offers a very low thermal expansion coefficient, high specific strengths, wear and heat resistance as compared to conventional Al alloys. To group all these properties, Aluminum based MMCs have become a very useful method for various industrial applications. Therefore, a combination of Aluminum (Al) and Tungsten carbide-cobalt (WC-Co) is of interest. Al-WC-Co composites with 10 to 35 weight % of WC-Co were fabricated using powder metallurgy o process. Then, the powder mixtures were pressed and sintered by using vacuum sintering technique at above 600 C. In this present research, the samples were tested for its hardness by rock well hardness test. It was found that the hardness increased with increase in percentage of WC-Co. The surface morphology of the samples were investigated by Scanning Electron Microscopy (SEM). PXRD (Powder X-Ray Diffraction) analysis reveals that, uniform structure of composites was formed in Al-WC-Co.

Laboratory Studies on Warm Mix Asphalt (WMA) using ZycoTherm Additive with Partial Replacement of Reclaimed Asphalt Pavement (RAP)

Volume 4 Issue 4 January - March 2017

Research Paper

Laboratory Studies on Warm Mix Asphalt (WMA) using ZycoTherm Additive with Partial Replacement of Reclaimed Asphalt Pavement (RAP)

Meghana A.N*, G. Kavitha**

* M.Tech Graduate, RASTA-Center for Road Technology, Volvo Construction Equipment Campus, Bengaluru, India.

** Faculty, RASTA-Center for Road Technology, Volvo Construction Equipment Campus, Bengaluru, India.

Meghana, A. N., and Kavitha, G. (2017). Laboratory Studies on Warm Mix Asphalt (WMA) using ZycoTherm Additive with Partial Replacement of Reclaimed Asphalt Pavement (RAP). i-manager’s Journal on Material Science, 4(4), 18-24. https://doi.org/10.26634/jms.4.4.10366

Abstract

Roads are the backbone of country's development, but the high level of emission generated in paving conventional bituminous pavements is always a major concern. For decades, Hot Mix Asphalt (HMA) had an upper hand in pavement construction all over the world. Hot mix asphalt was easy to produce, but required high temperatures to be maintained during transportation and laying. As HMA production involves high-energy consumption, production of bituminous mix with lower temperatures using different process is developed which is labeled as Warm Mix Asphalt Technology. In the present study, ZycoTherm additive, has been used in different dosages at different temperatures to prepare warm mix asphalt in the laboratory. ZycoTherm additive can be used with an optimal dosage of 0.07% by weight of bitumen at o o 135 C mixing temperature for WMA, and 30% RAP with 70% virgin aggregates containing 0.07% ZT WMA at 135 C, gives better stability and performance than other mixes. Hence, 30:70 is the most optimum blend. From the cost analysis, the construction cost for the 30:70 combination works out to be 9.5 lakhs per km, which shows a saving of 33.25% compared to HMA construction.

Abrasion Wear Characterization of Natural Stones Subjected to Foot Traffic and Correlation Between Abrasion and Mechanical Properties

Volume 4 Issue 4 January - March 2017

Research Paper

Abrasion Wear Characterization of Natural Stones Subjected to Foot Traffic and Correlation Between Abrasion and Mechanical Properties

0*, R. Chaudhary**, H.S. Mali***, R. Nagar****

* Research Scholar, Department of Mechanical Engineering, Malaviya National Institute of Technology, Jaipur, India.

** Assistant Professor, Department of Mechanical Engineering, Northern India Engineering College, Delhi, India.

*** Assistant Professor, Department of Mechanical Engineering, Malaviya National Institute of Technology, Jaipur, India.

**** Professor, Department of Civil Engineering, Malaviya National Institute of Technology, Jaipur, India.

Pathri, B. P., Chaudhary, R., Mali, H. S., and Nagar, R. (2017). Abrasion Wear Characterization of Natural Stones Subjected to Foot Traffic and Correlation Between Abrasion and Mechanical Properties. i-manager’s Journal on Material Science, 4(4), 10-17. https://doi.org/10.26634/jms.4.4.10364

Abstract

Abrasion resistance is a property of a marble which gives an indication of the marble wearing quality when it is exposed to foot traffic. This property is tested according to ASTM C241 standards. Abrasion further helps in determining whether a marble is economically desirable and practical for floors, stairs, etc. For this, 48 samples were selected from different processing units of Rajasthan and were tested. Regression analysis was carried out to investigate the relation between the abrasion resistance and the mechanical properties of marbles determined according to ASTM standards. Although, it is believed that abrasion resistance of many materials are greatly affected by its hardness and it increases with the increase in the hardness. The correlations of abrasion resistance was found to be highly related with mechanical 2 2 2 properties like modulus of rupture (R = 0.96), compressive strength (R = 0.94), flexural strength (R = 0.96) along with 2 2 2 hardness (R = 0.84) while the water absorption (R = 0.08) and density (R = 0.44) were found to be less correlated.

Response Surface Modelling of Tool Electrode Wear Rate and Material Removal Rate in Micro Electrical Discharge Machining of Inconel 718

Volume 4 Issue 4 January - March 2017

Research Paper

Response Surface Modelling of Tool Electrode Wear Rate and Material Removal Rate in Micro Electrical Discharge Machining of Inconel 718

Govindan Puthumana*

*Post-Doctoral Researcher, Department of Mechanical Engineering, Technical University of Denmark, Lyngby, Denmark.

Puthumana, G. (2017). Response Surface Modelling of Tool Electrode Wear Rate and Material Removal Rate in Micro Electrical Discharge Machining of Inconel 718. i-manager’s Journal on Material Science, 4(4), 1-9. https://doi.org/10.26634/jms.4.4.10362

Abstract

Inconel 718 is a corrosion-resistant and high strength nickel-based alloy with wide range of applications, including components for cryogenic tankage, liquid fueled rockets and casings for aircraft engines. The material is characterized by high hardness, high temperature strength, low thermal conductivity and high strength causing it extremely difficult to machine. Micro-Electrical Discharge Machining (Micro-EDM) is a non-conventional method that has a potential to overcome these restrictions for machining of Inconel 718. Response Surface Method (RSM) was used for modelling the tool Electrode Wear Rate (EWR) and Material Removal Rate (MRR) with the input factors, such as voltage (V), peak current (I ) and pulse on-time (T ). The RSM analysis of variance results show that the main input factors’ pulse off-time and p on voltage are significant in controlling the tool electrode wear rate at 95% confidence level. An increase in voltage from 30 to 45 V and pulse on-time from 1 to 3 μs causes a linear decrease in EWR by 35%. Using response surface modeling, a 3 3 minimum EWR of 12.3184 μm /min and a maximum MRR of 37.2151 μm /min is obtained at a current of 1.07 A, pulse ontime of 4.44 μs, pulse off-time of 4.06 μs and voltage of 60 V.