Scientific papers - Annals of "Dunarea de Jos" University of Galati - Analele științifice ale Universității "Dunărea de Jos" din Galați: Recent submissions
Now showing items 81-100 of 1845
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Researches Regarding Temperature Influence on Classic and Synthetic Quenching Medium
(Universitatea "Dunărea de Jos" din Galați, 2009)In this paper were analyzed experimental graphics for quenching cooling curves of oil at 20°C,40°C,60°C, 80°C and carboxymethyl cellulose (CMC) 1,5% solution in water at the same temperatures. Velocity cooling was studied ... -
Elements of Drawing Theory and Technology of the High Mechanical Strength Wires in Ultrasonic Field
(Universitatea "Dunărea de Jos" din Galați, 2009)In the paper are presented elements of drawing theory and technology of the high mechanical strength wires, when the auger die is located in the maximum of the waves oscillation and it is activated on drawing direction. ... -
Improving of Functional Parameters for Pressure Casting Machine with High Degree of Finishing
(Universitatea "Dunărea de Jos" din Galați, 2009)The paper presents a mathematic model of static and dynamic characteristics for casting machine. This machine has a hydraulic action for the casting chamber (her closing and introducing of molten alloy). This action is ... -
The Assessing of Mechanical Characteristics of the Steel Sheets Designed for Drawing for a Five-Month-Period as an Effect of Natural Ageing
(Universitatea "Dunărea de Jos" din Galați, 2009)In the paper it is presented a study run on a five-month-period regarding the changes in the mechanical characteristics due to natural ageing for a drawing steel, cold rolled, unalloyed with 0.04% C. The ageing tendency ... -
Redesigning a Jaw Crusher Using Value Analysis Part I
(Universitatea "Dunărea de Jos" din Galați, 2009)Value Analysis (VA) is a method that provides an operating technique using a creative and organized approach. It is managed by a group, each of them selected according their expertise in specific subjects and coordinated ... -
Experimental Studies Regarding the Implementation Possibilies of a Quality Control System for Ceramic Products in Continuous Flux Production
(Universitatea "Dunărea de Jos" din Galați, 2009)In the current paper the authors studied the possibilities and limitations of a system intended to evaluate the quality of ceramic products directly on the production line. The system is based on a data mining specific ... -
Study of the Sintering Process of Iron Powders Coated with Nano-Hydrocarbon and the Resulting Microstructure at Temperatures up to 1200°C
(Universitatea "Dunărea de Jos" din Galați, 2009)The objective of the research is development and study of a new ecologically friendly and technologically advanced method for introduction of carbon during sintering of low alloyed iron powders ASC 100.29. The method is ... -
Researches on the Viscoplastic Behavior of a CrMo Alloyed Steel
(Universitatea "Dunărea de Jos" din Galați, 2009)The paper shows the results of the researches concerning the deformation behavior of alloyed steel with chromium and molybdenum. The plastic deformation behavior is researched in the experimental way, using the torsion ... -
Heavy Metal Ions Cu (II), Co (II) and Cr (III) bufunctionally Improved with Hydroxamic and Amidoxime Groups Chelating Ion Exchangers
(Universitatea "Dunărea de Jos'' din Galați, 2009)Two new types of bifunctional chelating ion exchangers on the basis of ethylacrylate acrylonitrile: divinylbenzene copolymers with hydroxamic acid and amidoxime groups have been evaluated for Cu(II), Co(II) and Cr(III)ions ... -
Critical Analysis of "Maximum Stress Failure"
(Universitatea "Dunărea de Jos" din Galați, 2009)The paper deals with critical considerations upon different points of view that were enounced by some authors referring to Maximum Stress Failure Criterion for composite materials. The considerations stem both from a ... -
Physical-Chemical Properties (Cu-Sn) -Mo Composite Materials
(Universitatea "Dunărea de Jos" din Galați, 2009)The article is devoted to the study of corrosive and thermal stability of materials composition on the basis of copper, obtained by the EB-PVD method. It is shown in this work that corrosion of (Cu-Sn)–Mo composites have ... -
Electrodeposition Obtaining and Corrosion Behaviour of Phenol Formaldehyde Resin/Zinc Composite Coatings
(Universitatea "Dunărea de Jos" din Galați, 2008)The present work has the purpose of obtaining composite coatings in zinc matrix by using phenol - formaldehyde resin type NOVOLAC (RESITAL 6358/1) in the electrodeposition process of zinc. The PF resin/Zn composite ... -
Laser Surface Alloying of Some Steels from SiC Predeposited Powders
(Universitatea "Dunărea de Jos" din Galați, 2008)For the purpose of studying the possibilities of increasing the wear resistance, specimens of three steels with 0.2%C, 0.46%C and 1%C were surface alloyed with reinforcement from overlapping pastes with green SiC hard ... -
The Modern State of Works in Field of Electron-Beam Technology of Melting and Evaporation of Metals and Non-Metals in a Vacuum
(Universitatea "Dunărea de Jos' din Galați, 2008)In developing of new processes for growing metal (composite) films, the main attention is given to controlling the metal vapour flows: through energy state of the condensing particles, their molecular composition, ... -
Research for Realize the Configuration of Wind Energy Turbine
(Universitatea "Dunărea de Jos" din Galați, 2008)For already quite some time, the word energy has received a somewhat negative connotation. Some circles want to make us believe that energy is something that one should have disgust for; a necessary evil that should be ... -
Surface Hardening Over 38MoCrA109 Steel by Yag:Nd Pulse Laser
(Universitatea "Dunărea de Jos" din Galați, 2008)Laser offers unique capabilities for high energy concentrations at small surfaces. Factors that have influences over interactions between laser beam and steel surfaces have very high control. Pulse laser YAG:Nd is usually ... -
Nanostructured Surface for 38MoCrA109 Steel by Nitriding in Nitrogen Atmosphere and Yag;Nd Pulse Laser Activation
(Universitatea "Dunărea de Jos" din Galați, 2008)YAG:Nd pulse laser is usually used for cutting and welding. The paper is based by experiments using YAG:Nd pulse laser (KVANT 17-CIS made). Technological modules were assembled for laser beam deviation and for relative ... -
Mechano-Erosion: A Novel Test Methodology to Accelerate Erosion in Rolling Contact Fatigue Experiments
(Universitatea "Dunărea de Jos" din Galați, 2008)Rolling contact fatigue testing of rolling elements with low saturation temperature lubricants result, in several difficulties. Mainly, uncontrolled phase changes due to flow dynamics often cause difficulties in assessing ... -
Glow Discharge Optical Emission Spectrometry (GDOES), an Effectiveness Method for Characterizing Composition of Surfaces and Coatings
(Universitatea "Dunărea de Jos" din Galați, 2008)Within the frame of this work, the technical procedures and real advantages of using Glow Discharge Optical Emission Spectroscopy (GDOES) for establishing depth concentration profiles of surfaces are presented. GDOES can ... -
Modelling by Finite Element Analysis Method of Stress State Establishing for an Alloy Steel
(Universitatea "Dunărea de Jos" din Galați, 2008)The paper presents some results about the tension state in samples subject to pure bending fatigue process. Numerical simulation based on finite element method was used. The tension field induced by a vertical deformation ...
