Scientific papers - Annals of "Dunarea de Jos" University of Galati - Analele științifice ale Universității "Dunărea de Jos" din Galați: Recent submissions
Afișează articolele 221-240 of 1845
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Surface Tension of Liquid Copper in Dilute Oxygen Concentrations
(Universitatea "Dunărea de Jos" din Galați, 2006)The studies of this paper regarding the influence of low oxygen contents on the liquid copper surface tension had as base „sessile drop” method and the determination of the oxygen content using calculation ratio where ... -
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 ... -
Surface Hardening by Nitration for Some Stainless Austenite Steel Types
(Universitatea "Dunărea de Jos" din Galați, 2006)Stainless austenite steel types have a good resistance to corrosion in different natural, industrial environments but their hardness and mechanical resistance are low enough. In order to assure an increased resistance ... -
Composite-Decorative Tiles with Granite
(Universitatea "Dunărea de Jos" din Galați, 2006)The paper presents the results of the authors’ scientific research on a composite material with polymeric matrix, hardened with rock particles. It was studied the influence of the quantity of the hardening phase on the ... -
Processing Smart Wires from Cu-Al-Ni System
(Universitatea "Dunărea de Jos" din Galați, 2006)In this paper we present some results concerning plastic deformation applied to shape memory alloy and two most direct characterization methods for shape memory. We work with a copper based alloy- Cu Al13Ni 4. Over eight ... -
The authentification of Old Bronze Coins and the Structure of the Archaeological Patina
(Universitatea "Dunărea de Jos" din Galați, 2006)This paper presents comparative results concerning the chemical composition and mineralogical distribution of the main compounds from the structure of the archaeological patina of ancient bronze coins, which were determined ... -
Researches Concerning the Correlation of the Semiplanetary Rolling Process Factors
(Universitatea "Dunărea de Jos" din Galați, 2005)An available solution of the elimination of the superficial cracks network at the continuous cast slabs is the semiplanetary rolling. The application of a semiplanetary rolling mill at the exit of slab from the curve zone ... -
Industrial Electron-Beam Equipment on Base of Noble and Non-Ferrous Metals
(Universitatea "Dunărea de Jos" din Galați, 2006)Method of obtaining of metals and alloys by melting – is basic. By this way make in practice the majority of metals, alloys and ligatures. The essence of a method is, that in special melting device (furnace) to melt metal ... -
The Laboratory Experiments Regarding the Intercritical Heat Treatments Applied an the Low-Alloyed Steel
(Universitatea "Dunărea de Jos' din Galați, 2006)The paper presents the research results regarding the influence of the intercritical thermal treatments carried out on some hypoeutectoid steel castings. The purpose of this research at the laboratory scale is to ... -
Experimental Results at Modelling of the Flow and Deformation Fields at the Profiles Rolling
(Universitatea "Dunărea de Jos" din Galați, 2006)This paper presents the results for modeling of the rolling process based at the deformable continuous medium mechanics, the theory of field lines. The rolling of the profiles and plates may be evaluated as the plane ... -
Selective Organic Reactive for Determination of Several Heavy Metals from Different Materials
(Universitatea "Dunărea de Jos" din Galați, 2006)The research regarding the synthesis and characterization of tiobis-β- naphthol have established that it can be used as an efficient analytical reactive for separating through extraction the heavy metals in watery env ... -
Influence of Steel Modification Allied with 4-7%Si on Macrostructure
(Universitatea "Dunărea de Jos" din Galați, 2006)The goal of this paper is to test the effect of odification process of liquid steel with 4-7% silicon content, in the course of pouring out from steel-smelting furnace into ladlet, on macrostructure. The research settled ... -
The Correlation Between Mechanical Characteristics and Technological Parameters in Heat Treatments Applied to Moulding Aluminium Like at Si5Cu1
(Universitatea "Dunărea de Jos" din Galați, 2006)The paper contains an experimental study of colligating the technological parameters of the artificial aging operation namely time and soaking temperature with hardness and mechanical strength properties gained after the ... -
Mercury Determination from Incidentally Polluted Waters by Collecting Gravimetry in Organic Stage Method
(Universitatea "Dunărea de Jos" din Galați, 2006)Determination of mercury in incidentally polluted waters, presented in CALIST Program, was carried out using tiobis-β-naphthol as a reagent. The method proposed for mercury determination, named “collecting gravimetry in ... -
Improved Hardness and Tribocorrosion Properties of Nickel Coatings By Co-Depositing ZrO2 Micro-Sized Dispersed Phase During Electroplating Process
(Universitatea "Dunărea de Jos" din Galați, 2006)The tribocorrosion properties of ZrO2 – nickel microstrucured composite coatings have been studied in the following conditions: -Solution: 0.5M K2SO4 -Tribo corrosimeter: pin on disc connected with electrochemical ... -
Jassy Achievements Regarding the Casting of Art Pieces for Artificial Lighting in Orthodox Churches
(Universitatea "Dunărea de Jos" din Galați, 2006)In this paper are presented some art pieces, used in orthodox religion for artificial general lighting. These pieces, realized at SC RANCON SRL Jassy, present a special importance, because they join harmoniously the ... -
The Structural Optimizing of Metallurgical Installations and Mechanisms
(Universitatea "Dunărea de Jos" din Galați, 2006)The structural optimizing of used mechanisms in the machines construction and metallurgy through the further liberty degrees creation is essential projection problem, as it enters the closing mechanisms case with sliding ... -
Researches Regardingbthe Thermomechanical Treatments Influence on the Structure and Characteristics of the Aluminium Alloys for Aeronautics
(Universitatea "Dunărea de Jos" din Galați, 2005)The laboratory experiments were made on the two aluminium alloyed qualities used for aeronautical industry. More working conditions of the intermediary (PTMI) and finally (PTMF) thermomechanical treatments were used on ... -
The Use of Systems Analysis in Environmental Engineering
(Universitatea "Dunărea de Jos" din Galați, 2005)The depletion of energy resources has been of primary concern in the `70s and `80s. In recent years, the decline of the environment due primarily to our energy-related activities has become severe and raises serious ... -
Researches Regarding the Rolling of the Sinterized Metallic Powders Strips
(Universitatea "Dunarea de Jos" din Galați, 2005)This paper work is distinguishing the size modification of those two material layers gotten by the bimetallic strip rolling, joined by the sintering. The iron powders sediment was achieved on the steel strip backing. ...