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1961 articles for “4” (ranking capped at the first 2,000 matches — narrow the search to see the rest)
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Effect of Solutionizing and Ageing on Mechanical Properties of AL2024 Reinforced Alumina Particulate
Abstract: AbstractAluminium 2024 alloy is widely used at automobile and aircraft industries in the form of cast component with varying section size. This study investigates how the microstructure and mechanical properties of AL2024 alloy before and after heat treatment processes. Solution sing at 493°C-5H followed quenching in water at room temperature. Stir casting method is followed to obtain the required composite material with proper mixing of reinforcement. Further, the mechanical properties …
Published in Journal of Materials & Metallurgical Engineering · Vol. 8, Issue 3, 2018 · pp. 8–12 Read article
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Structure and Cube Texture Development Trend of Al4.5MgMn Alloy at Variable Annealing Conditions
Abstract: Hot-rolled Al4.5MgMn alloy was cold rolled to true strain levels 0.8, 1.6 and 2.3. Annealing at 300°C, 350°C and 400 °C was done to develop annealing structure. The annealed structures were measured by SEM-EBSD. The average grain size and grain size distributions were measured using Sigma-scan-Pro 5 structure analysis software. The average grain size and grain size distributions showed higher number frequency of lower annealing grain size with the increase …
Published in Journal of Materials & Metallurgical Engineering · Vol. 3, Issue 3, 2013 · pp. 32–38 Read article
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Effect of Time Exposure on Human Blood by Laser Flash Photolysis
Abstract: Diffuse reflectance laser flash photolysis has been used in blood sample to measure transient triplet spectra of free radical or reactive oxygen species (OH, O2, H2O2) generated in free cell systems was investigated using laser flash photolysis and electronic absorption spectra. In all cases, triplet–triplet absorption spectra with the application of this technique to studies concentration of normal human blood sample. The concentration of normal human blood sample is reduced …
Published in Journal of Materials & Metallurgical Engineering · Vol. 10, Issue 2, 2020 · pp. 15–20 Read article
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Preparation and Characterization of a Novel Lignocellulosic Fiber from Calotropis gigantea Stem Fiber for Thermoplastic Composites
Abstract: In the current article, Calotropis gigantea fiber mat (CGM)/thermoplastic polypropylene (PP) strengthened non-woven unidirectional composites were successfully manufactured by hot compression molding using the film piling method. Micromechanical and physicomechanical properties such as tensile, flexural, compressive, impact properties, thickness, swelling, and water absorption of CGM/PP composites were evaluated for the effects of CGF composition, mercerization of CGF as well as the inclusion of two types of coupling agents (vinyltriethoxysilane and …
Published in Journal of Materials & Metallurgical Engineering · Vol. 12, Issue 1, 2022 · pp. 15–33 Read article
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Study on High Strength Ti-Al-V Alloy at Cryogenic Temperature
Abstract: The α+β type high strength titanium alloy is usually used as a structural biomaterial for the manufacturing of orthopaedic prostheses as well as surgical and dental implants. The Ti-Al-V alloy had been deliberately solution treated at 860°C for 1 h (subsequently quenched in variable mediums) just below the β transus but within the α+β region to avoid grain coarsening for single β region as well as accomplish optimum balance properties …
Published in Journal of Materials & Metallurgical Engineering · Vol. 13, Issue 1, 2023 · pp. 1–14 Read article
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Optimizing the Ratio of Number of Tubes in PCNTFET to NCNTFET for Digital Circuits
Abstract: AbstractCarbon nanotube Field Effect Transistors (CNTFET) offer various benefits as compared to other FETs. Many circuits can be constructed using PCNTFETs (P-type CNTFET) and NCNTFETs (N-type CNTFET) similar to the PMOS and NMOS of the CMOS technology. The CNTFETs employ carbon nanotubes in the channel of the device to provide a path for the ballistic conduction of electrons. The different ratios of number of tubes in channel of the PCNTFET …
Published in Journal of Microelectronics and Solid State Devices · Vol. 5, Issue 1, 2018 · pp. 34–40 Read article
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Six Quark Cluster Formation Effects on the Magnetic Moments of Mirror Nuclei with Closed Core+One Nucleon
Abstract: AbstractThe magnetic moments of mirror nuclei with closed core+one nucleon with A=13, 17, 29, 33, 41 (13C6~14N7, 17O8~17F9, 29Si14~29P15, 33S16~33Cl17, 41Ca20~41Sc21) have been estimated in the framework of hybrid quark model. The correction to the magnetic moment due to the six-quark cluster formation effects as estimated in the present work are compared with various other corrections. It is observed that the quark cluster formation effects make a sizable contribution to …
Published in Journal of Nuclear Engineering & Technology · Vol. 7, Issue 2, 2017 · pp. 12–19 Read article
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Assessment of Natural Radiation Exposure from Sand and Sediment Samples Obtained from Kuakata Beach Area in Bangladesh
Abstract: In Bangladesh, Kuakata Beach situated in Patuakhali district contains some in sand and sediment. In this paper the activity concentration and absorb dose of sand and sediment collected sand and sediment collected from Kuakuta Beach were measured. The activity concentrations of radionuclides and their respective annual effective dose rates, produced by 226Ra, 232Th, 40 K were measured using a High Purity Germanium (HPGe) detector of relative efficiency 40%. The measured …
Published in Journal of Nuclear Engineering & Technology · Vol. 8, Issue 3, 2018 · pp. 18–26 Read article
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Sizing and Power Estimation Models of an Off-grid Wind Power Supply System in Sokoto, Nigeria
Abstract: AbstractThe exploitation of wind energy for electricity generation could be done by the use of wind turbines. The power output from the wind generator fluctuates due to the variability of wind speed and therefore storage facilities are needed for power supply stability. This research focuses on the wind power potential investigations, sizing of wind power system components and determination of the better wind turbines for residential power supply in Sokoto, …
Published in Journal of Nuclear Engineering & Technology · Vol. 10, Issue 1, 2020 · pp. 1–7 Read article
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Hazards of Power Production-A comparative study
Abstract: Nuclear energy has played a major role in reducing the world's use of oil for electricity generation over the past decades. Current estimates are that uranium resources will last some 400 to 500 years at the present rate of use. This resource base could, furthermore, last some 50 times longer if breeder reactors are introduced. Of the main energy sources, namely coal, hydro and nuclear, nuclear can be even considered …
Published in Journal of Nuclear Engineering & Technology · Vol. 11, Issue 1-2, 2021 · pp. 1–20 Read article
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Homodinuclear and Heterodinuclear Sulphocyanate Bridged Lewis Acid Complexes: An Insight into their Reactivity and Structural Flexibility
Abstract: This precpective reports the synthesis of homodinuclaer and heterodinuclear complexes of the type MM (SCN)4 and MM/ (SCN)4 (M-Co2+ , Ni, M/ , = Cd2+, Hg2+) with N.N' Bis (salicylidene) 1,2- plionylendfamine. A superficial insight has also been reported about their reactivity and structural flexibility. The complexes have been characterized on the basis of elemental analysis, conductivity measurements, magnetic susceptibility measurements, Proton magnetic resonance UV-Visible and midIR spectral studies. The …
Published in Journal of Nuclear Engineering & Technology · Vol. 11, Issue 1-2, 2021 · pp. 42–47 Read article
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Decrement of Spin-orbit Splitting Near Calcium Region
Abstract: Explanation of the observed decrement of splitting of spin-orbit partners near shell closure, has been sought through an introduction of tensor interaction in a mean field type of calculation. The strength of the tensor interaction used in the Skyrme Hartree Fock theory has been optimized by the reproduction of the experimentally determined splitting of 1d, 1f and 2d shell model states (both neutron and proton) of the isotopes of Calcium …
Published in Journal of Nuclear Engineering & Technology · Vol. 13, Issue 1, 2023 · pp. 11–22 Read article
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Effect of Fillers on Electrical Conductivity of Epoxy Composites
Abstract: AbstractThis paper reports, electrical conductivity studies carried out on RT cure epoxy resin (LY556+HY951) containing three different particulate fillers graphite (Gr) a soft material, silicon carbide (SiC) a hard material and a hybrid graphite and silicon carbide (Gr-SiC). The weight fractions of three different fillers were varied from 10% to 40 wt% in steps of 10%. Increased filler fraction increases the electrical conductivity of epoxy composites for all the three …
Published in Journal of Polymer & Composites · Vol. 6, Issue 3, 2018 · pp. 25–30 Read article
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To explore the effect of polyethylene glycol additive on mechanical and gas permeation properties of polyvinyl alcohol membranes
Abstract: Polyvinyl alcohol (PVA) membranes were prepared by solution casting and blended with Polyethylene glycol (PEG) in de-ionized water which led to the formation of porous and flexible membranes. Extensive experimentation were performed, in order to find out that at what composition of PEG pores will be generated in the PVA membranes. The PVA polymer is a hard and crystalline thermoplastic so high concentrations of PEG were used, i.e. 40 wt%, …
Published in Journal of Polymer & Composites · Vol. 7, Issue 1, 2019 · pp. 27–33 Read article
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Characterization and Gamma Irradiated MA-EMA Copolymer by ESR and FTIR Techniques
Abstract: AbstractGamma irradiation effect of methacrylamide-ethyl methacrylate (MA-EMA) copolymer has been investigated by electron spin resonance (ESR) and Fourier Transform infrared (FTIR) spectroscopic techniques. The ESR spectrum observed for gamma irradiated MA-EMA copolymer has shown resolved hyperfine (hf) pattern at lower temperatures (77K) while at higher temperatures the spectrum is appeared to be broadened. Fourier Transform Infrared spectra of pure and gamma irradiated MA-EMA copolymer have been recorded for the copolymer …
Published in Journal of Polymer & Composites · Vol. 4, Issue 3, 2016 · pp. 40–44 Read article
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Effect of Nature of Short Fibers/Carbon Black on Curing Characteristics and Physico-Mechanical Properties of Ethylene Propylene Diene Monomer Rubber Composite
Abstract: AbstractIn this research work, ethylene propylene diene rubber (EPDM) composites were prepared by incorporating the various types of short fibers like cellulose, polyester, p-aramid, m-aramid, cotton short fibers and carbon black on a 2 roll mill. The effect of different short fibers content on the curing characteristics and physico-mechanical properties of EPDM composites were studied. When the loading of carbon black was fixed, it was found that carbon black content …
Published in Journal of Polymer & Composites · Vol. 4, Issue 2, 2016 · pp. 34–43 Read article
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A Review on Hole Making in Carbon Fiber Reinforced Plastic Laminates
Abstract: AbstractThe existence of fiber reinforced plastic (FRP) laminates in the world since 1940s, and its application is till date growing continuously. The research papers published in this field focused on the manufacturing of laminates to its final uses. The FRPs can be manufactured by various processes, but its assembly of laminated product required a hole. Hole in laminate may be produced by means of conventional or unconventional machining. Major attention …
Published in Journal of Polymer & Composites · Vol. 4, Issue 2, 2016 · pp. 44–51 Read article
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A Review on Natural Fiber and its Hybrid Composite Plastic Materials
Abstract: AbstractNowadays human beings are facing problems related to plastic based pollution. Due to that, engineers are trying to reduce the percentage of plastic as much as possible without affecting the functionality of given plastic based product. Hybrid composite materials having ability to replace some amount of the plastic with natural material are being tried. In this paper, we try to discover the different natural fiber based hybrid composite plastic materials …
Published in Journal of Polymer & Composites · Vol. 4, Issue 1, 2016 · pp. 4–8 Read article
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Studies on Mechanical, Electrical and Thermal Properties of Compatibilized PLA/ABS Blends Reinforced with Wood Flour
Abstract: AbstractPoly lactic acid (PLA) bio-polymer (60%) was blended with acrylonitrile butadiene styrene (ABS) (40%) and filled with wood flour (0, 10, 20%) using a twin screw compounding extruder and a suitable compatibilizer i.e., glycerol, is also incorporated into that mixture at a percentage of 4% respectively. Test specimens were prepared by using an injection molding machine for mechanical, electrical and thermal properties as per ASTM standards and the properties were …
Published in Journal of Polymer & Composites · Vol. 3, Issue 3, 2015 · pp. 20–26 Read article
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Design, Analysis and Fabrication of Composite Leaf Spring
Abstract: AbstractNowadays composite materials are one of the materials which are greatly attracting researchers. Reducing weight and increasing or maintaining the strength of materials is getting to be highly important research issue in this modern world. In this paper, design, fabrication and analysis of composite leaf spring have been presented. The objective is to design a composite leaf spring with reduced length and weight as compared to steel leaf spring. The …
Published in Journal of Polymer & Composites · Vol. 2, Issue 3, 2023 · pp. 4–14 Read article