Căutare Scientific papers - Annals of "Dunarea de Jos" University of Galati - Analele științifice ale Universității "Dunărea de Jos" din Galați după Data publicării
Afișează articolele 281-300 of 1845
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Research Concerning the Influence of Heat Treatment on Physical and Mechanical Properties of Aluminium Based Alloys
(Universitatea "Dunărea de Jos" din Galați, 2006)This work presents the experimental results concerning the behavior on heat treatment of on aluminum based alloy belonging to the class of aluminum alloys deformable and harden by heat treatment. The laboratory level ... -
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 ... -
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 ... -
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 ... -
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 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 ... -
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 ... -
Fuel Economy at the Heat Treatment Furnaces of Steel Cast Pieces
(Universitatea "Dunărea de Jos" din Galați, 2006)The paper presents a study made at the annealing furnaces for homogenization of cast pieces regarding the replacement of marsh gas with blast furnace gas, in a proportion of 100%. In this way an important economy of marsh ... -
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 ... -
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 ... -
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 ... -
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 ... -
Researches Concerning Phase Transition of Zirconium Titanate Prepared by Electrolytic Method
(Universitatea "Dunărea de Jos" din Galați, 2006)Powder zirconium titanate ceramics obtained by an electrolytic method has been investigated. Continuous phase transition were found to occur in powder zirconium titanate above and below a major discontinuity at 1120oC±10oC. ... -
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 ... -
Analysis of Wear Cutting Tools by Complex Powerexponential Function for Finishing Turning of the Hardened Steel 20CRMO5 by Mixed Ceramic Tools
(Universitatea "Dunărea de Jos" din Galaţi, 2006)In this paper it is analised the dependence regression between flank wear tools or wear out of belt width on the back surface VB and cutting time t in the form of complex power-exponential regression equation for turning ... -
Specific Aspects of the Contact Wheel-Rail and the “IN SITU” Rehabilitation of Tram Rails
(Universitatea "Dunărea de Jos" din Galaţi, 2006)The rails are an important and critical part of a railway system and are exposed, during service, to high stresses of different types, frequency and orientation and also to different environmental. The tram rails are in ... -
Upon Radial Fretting of Dissimilar Materials
(Universitatea ”Dunărea de Jos” din Galați, 2006)The paper presents a state of the art concerning radial fretting for dissimilar bodies and fretting damage. Four simple fretting models are defined in the literature: tangential, radial, rotational and torsional. Only the ... -
Failure of a Total Knee Prosthesis Tibial Tray Due to the Fatigue Wear
(Universitatea ”Dunărea de Jos” din Galați, 2006)Some studies report the failure of a tibial insert of knee prostheses due to the subsurface cracking and delamination wear [1]. The present study starts by analysing retrieved total knee prosthesis revealing the loss of a ... -
Model and Application of the Dispsersional aAnalysis for a Wear Study
(Universitatea "Dunărea de Jos" din Galaţi, 2006)This paper shows a coherent calculation model of the unifactorial dispsersional statistic analysis applied for the experimental data study obtained on samples of different volumes, drawn out from a researched statistical ... -
Bending of Thin Walled Pipes Using the Heat Realised by Friction
(Universitatea ”Dunărea de Jos” din Galați, 2006)This paper considers appliance of heat generated by friction to relieve deformation of light metals, having as example of bending thin walled copper pipes. Based on numerous, primarily experiment analysis the conclusions ...
