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Afișează articolele 50-69 of 552
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Calculation of the Deposited Layer Thickness Through Side Injection of Powder Using CO2 Laser
(Universitatea "Dunărea de Jos" din Galați, 2017)The paper presents a simplified theoretical model for estimating the operating parameters of the laser deposition by injecting the powder into the metal bath. The study considered the influence of the powder particles ... -
Calibration and Reference Blocks Used in Nondestructive Ultrasound Examination, According to New European Union Requirements
(Universitatea "Dunărea de Jos" din Galați, 2006)Pursuant international standards such of the European ones, the nondestructive examinations have to be worked out by the most possible accuracy and repeatability, that allow the difference making between the admitted ... -
Cellular Automata Method Studyng Recrystallization Process
(Universitatea "Dunărea de Jos" din Galați, 2013)A cellular automaton is a decentralized computing model providing a platform for performing complex computation with the help of only local information. The cellular automata method describes the evolution of a ... -
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 ... -
Characterisation of CVD Niobium Carbine Coatings on Hard Carbide Substrate
(Universitatea "Dunărea de Jos" din Galaţi, 2012)Hard coatings are often used for mechanical properties such as wear and friction resistance. The corrosion behaviour may also be an important criterion for industrial applications of these coatings. In this paper, the ... -
Characterization of Archaeological Objects Coming from Moldovian Settlements in the XIV Century
(Universitatea "Dunărea de Jos" din Galaţi, 2014)This paper presents the characterization, from the materials science point of view, of an object found in an archaeological vestige of the 14th century. The object studied (an iron nail used in constructions) proves that ... -
Characterization of Dental Metals and Alloys
(Univesitatea "Dunărea de Jos" din Galați, 2013)Metals and alloys in dentistry have seen remarkable progress due to their biocompatibility and deepen research on the application of advanced technologies to improve surface properties by controlling interactions material ... -
Characterization of Iron and Low Alloy Steel Powders Obtain by Water Atomization
(Univerversitatea "Dunărea de Jos" din Galați, 2009)Three types of iron and low ally steel powders were investigated to determinate their physical properties and surface morphology by SEM analysis. The powders were obtained by water atomization. The first type of powder ... -
Characterization of Sintered Hardmetals Coated with Tic
(Universitatea "Dunărea de Jos" din Galaţi, 2013)This paper presents the realization of TiC thin films by CVD method. The thin layers of TiC thicknesses were 8 and 10μm, their thickness increasing with time, keeping the temperature. Diffractometer analysis certifies ... -
Characterization of Thick Hard Layers with ni-Cr-B-Fe-Al Alloy Obtained by Laser Cladding
(Universitatea "Dunărea de Jos" din Galați, 2009)To increase the resistance to wear and corrosion of the surface layers made from steel with 0.45% C, multilayer deposition was tested by injection of powder with chemical composition of 8.9% Cr, 4.5% Fe, 5.1% B, 2, 4% ... -
Characterization on the Red Mud Resulted from the Alumina Bayer Process Production for the Future Use in Geopolymers Synthesis
(Universitatea "Dunărea de Jos" din Galați, 2014)This paper presents the results of analyses on the chemical, structural and morphological processing of bauxite red mud resulting from alkaline wet Bayer technology. The characterization of the material considered as ... -
Chargers for Blast Furnaces Double Bell VS. Rotary Chute
(Universitate "Dunărea de Jos" din Galaţi, 2016)The distribution of materials at the mouth of the loading of a furnace is decisive for its operation at optimal efficiency. For this operation using charging devices that can be of several types is useful. The paper ... -
Chemical and Structural Changes for Bimetallic Materials Obtained by the Welding Process
(Universitatea "Dunărea de Jos" din Galați, 2005)This paper presents the transformations which take place during the obtaining process of bimetallic materials. As a plating process was used the welding. The added material was a bronze with aluminum complex alloyed with ... -
Choosing and Using Rationally the Thermic Processed Steels
(Universitatea "Dunărea de Jos" din Galați, 2012)On a global scale one can notice a constant preoccupation for a rational choosing and using of the materials on the whole and, especially of the steels with the main objective the increase of the machines’, equipment’ ... -
Cladding by Welding with Hard Alloys
(Universitatea "Dunărea de Jos" din Galați, 2009)The paper presents the results of a research on the role of cladding by welding support of continuous casting plant. Emphasizing that plating leads to outer layer the study presents a complex of properties favorable for ... -
Coating of the Lasting Moulds with Hard Alloys
(Universitatea "Dunărea de Jos" din Galați, 2010)This paper presents the researches on the welded coating of lasting moulds used for casting at high melting temperatures. It shows that the coating through the flux welding with the addition of metal powders and graphite ... -
Coatings Systems: Chromium Carbide, Nitride and Carbonitride
(Universitatea "Dunărea de Jos" din Galați, 2005)The process of the chemical deposition from vaporous implies the adsorption of the mobile atoms (monomers) on the substrate surface, their migration with embryos and stable nucleus formation, followed up by further growth ... -
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 ... -
Comparative Corrosion Behavior of Pure Copper and Brass in 3.5% NaCl Solution
(Universitatea "Dunărea de Jos" din Galați, 2016)Copper and brass are used in many economic sectors as electrical, construction, transport and others. From common household electrical wiring to boat propellers and from photovoltaic cells to saxophones, copper and its ... -
Comparison of the Efficiency of Three Types of Solar Collectors
(Universitatea "Dunărea de Jos" din Galați, 2012)Solar energy is one of the most abundant resources energy available in the world. Solar collectors have evolved in the last decades, but still they haven’t reached very high efficiencies. The collector efficiency is ...
