Căutare 1993 -2018 după Data publicării
Afișează articolele 401-420 of 552
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Effect of an a Oxy-SulPhide Inoculant Enhancer on Graphite Parameters in the Mould Inoculated Compacted Graphite Cast Iron
(Universitatea "Dunărea de Jos" din Galaţi, 2014)In compacted/vermicular graphite cast iron production, inoculation is applied to limit the formation of carbides, but usually this treatment also promotes nodular graphite with improved nodularity. The main objective of ... -
Dynamics of Nutrients in Aquatic Ecosystems: The Case Study of Ciric Basin River at Nord of Iași City
(Universitatea "Dunărea de Jos" din Galați, 2014)A 1 year dynamics of two biologically limiting nutrients (N and P) has been carried out in the Ciric basin river at nord of Iasi City. The total nitrogen concentrations varied from 7.55-17.55 mg N/L and total phosphorus ... -
Comparative Characteristics of Martensite and Bainite in Cu-Based SMAs
(Universitatea "Dunărea de Jos" din Galați, 2014)The present work reports the evolution of micro-structure and shape memory behavior in a Cu-15 Zn-6 Al (mass. %) shape memory alloy (SMA), as a function of the applied hot working procedure and of the performed heat ... -
The Evolution of the Characteristics of Mechanical Resistance for the Nitro-Carburized Treated Steel, After Thermo-Magnetic Treatment
(Universitatea Dunărea de Jos" din Galaţi, 2014)The aim of the research was to study the evolution of the characteristics of mechanical resistance for one type of steel. The material was subjected to the thermo-chemical (nitro-carburized treatment in plasma) treatment ... -
Research on the Work Place Security and Environmental Factors Affected by Lathe Work
(Universitatea "Dunărea de Jos" din Galaţi, 2014)Most work place risks are spatially and temporally determined, so a critical early need is to establish the risk of what (is happening) to whom (which part of the environment is affected), where (location) and when (in ... -
Research on the Influence of the Complementary Phase Percentange on the Properties of Copper-Based Composites
(Universitatea "Dunărea de Jos" din Galaţi, 2014)The article presents the method to obtain copper matrix composite with Cu- Al-Fe alloy particles as complementary phase. The samples were obtained by powder metallurgy methods using different percentages of complementary ... -
Influence of Cooling Oil on the Surface Quality of the Roller Strip
(Universitatea "Dunărea de Jos" din Galaţi, 2014)The excess of emulsion used in the lamination process leads to the formation of drops which in the annealing process forms spots of burned emulsion. It was also shown to cause formation areas with high carbon concentrations ... -
Metal Heating Furnace with Flue Gas Condensation. A Thermoeconomic Analysis
(Universitatea "Dunărea de Jos" din Galaţi, 2014)The heat treating furnaces are one of the largest energy consumers in the manufacturing sector and therefore many techniques to improve their energy efficiency have been developed. One of them focuses on the recovery of ... -
Corrosion Behavior of Zinc Alloy Layers
(Universitatea "Dunărea de Jos" din Galați, 2014)The alloying of zinc with some additional elements in specific quantities could be reliably used in the hot-dip coating process. These elements conferr substantially improved performance to the end-product specially by ... -
Effect of ZnO Nanoparticles on the Anticorrosion Properties of Epoxy Coating
(Universitatea "Dunărea de Jos" din Galați, 2014)Homogeneous epoxy coating obtained by embedding ZnO nanoparticles (≤50 nm) in the epoxy matrix, was applied on Grade A naval steel substrates by dipcoating method. The morphology and microstructure of the coatings ... -
Studies and Research on Treatment of Titanium Alloys
(Universitatea "Dunărea de Jos" din Galați, 2014)Titanium and its alloys have an extended use due to special properties. The paper highlights the TiZr alloy intended to manufacture prostheses, the influence of plastic deformation on the properties and structure. Applied ... -
Research on Abrasive Wear Behaviour of laser Cladding Lyers with Aluminum Bronze Powders
(Universitatea "Dunărea de Jos" din Galați, 2014)The paper presents the wear behaviour on rotating disk with abrasive paper of laser cladding layers with aluminum bronze powders compared with steel samples and aluminum bronze classically quenched. The hardness and wear ... -
The Influence of Different Coatings on the Grafhite Degeneration in the Superficial Layer of Iron Castings
(Universitatea "Dunărea de Jos" din Galați, 2014)The main objective of this experimenal reserch is to investigate new possibilities for reducing the graphite degeneration phenomenon in the superficial layer of iron castings. For the experiment, a spheroidal graphite ... -
Wear Behavior of Carburizing on Powder Metallurgy Alloys
(Universitatea "Dunărea de Jos" din Galați, 2014)In this paper is studied the influence of wear behavior of carburizing in fluidized-bed on sintered alloys produced by powder metallurgy route. In powder metallurgy, carburization is a thermochemically treatment that ... -
Study Related to improve Performance of a Neutralizing Gas Dynamics System
(Universitatea "Dunărea de Jos" din Galați, 2014)Worldwide, the series of attacks "with bomb" are the most common, accounting for over 80% of terrorist attacks. The many constructive solutions of Improvised Explosive Devices (I.E.D), would require for defusing sequence ... -
Antimicrobial Properties of Semiconductive Oxide Nanoparticles. From fundamental to Application
(Universitatea "Dunarea de Jos" din Galați, 2014)A problem of modern society is the spread of diseases worldwide. Infection control and maintaining a high level of hygiene by applying antimicrobial coatings (including medical products, packaging materials, membrane ... -
Obtaining and Studying Tensile Strength for Non-Precious Alloys Based Cobalt
(Universitatea "Dunărea de Jos" din Galați, 2014)This paper presents aspects of obtaining non-precious dental alloys of Co-Cr-Mo alloys system and experimental tests to determine tensile strength, carried on standard flat specimens. -
Establishing the Rolling-Friction Coefficient for Different Contacts Between Balls and Termochemicallly Treated Steel Rolling Paths
(Universitatea "Dunărea de Jos" din Galați, 2014)Within the frame of this work, the influence of four very well-known and often used thermochemical treatments (carburizing, carbonitriding, nitriding and nitrocarburizing) of steel rolling paths applied on rolling-friction ... -
Structural Changes Associated with the Pseudoelastic Response of Fe-based Shape Memory Alloys
(Universitatea "Dunărea de Jos" din Galați, 2014)The pseudoelastic responses of two types of iron base shape memory alloys (SMAs) were introduced and discussed. The former was based on Fe-Mn-Si system, obtained by classical (CM) and by powder metallurgy (PM) manufacturing. ... -
Challenges in Corrosion Protection using Vegetable Extracts as Inhibitors-Electrochemical Studies
(Universitatea "Dunărea de Jos" din Galați, 2014)Corrosion is an irreversible chemical or electrochemical reaction of a material with its surrounding environment or medium which results in consumption of the material or in dissolution into the material of a component ...