Căutare 2008 fascicula9 nr2 după Titlu

Afișează articolele 1-20 of 22

    • An Analytical Procedure for the Prediction of the Stress-Strain State in Notches Under Multiaxial Fatigue 

      Pitatzis, Nikolas; Savaidis, Alexander; Savaidis, Georgios (Universitatea "Dunărea de Jos" din Galaţi, 2008)
      This work presents an analytical procedure for estimating elastic-plastic stresses and strains in notched shafts subjected to synchronous non-proportional torsional and tensile cyclic loading. The specification of the ...

    • Behaviour of Some Important Components in a cold Rolling Mill 

      Dragomir, Ştefan; Dragomir, Georgeta; Bordei, Marian (Universitatea "Dunărea de Jos" din Galaţi, 2008)
      For a good behaviour of mill parts and accurate functioning it is necessary to have an integrated system for all mill tandem. It is important to know the speed controls and strip tension in correlation with torque, ...

    • Contribution in the Domain of the Contact Stresses Between Cylinders of Cold Rolling 

      Maimon, A.D.; Boazu, D.; Stoicescu, L. (Universitatea "Dunărea de Jos" din Galaţi, 2008)
      Elasto-plastic contact stresses between working cylinder and support cylinder of cold rolling using FEM are presented in this paper. Pressure and tractions resulted from the rolling process were obtained by using a ...

    • Electrodeposition Obtaining and Corrosion Behaviour of Phenol Formaldehyde Resin/Zinc Composite Coatings 

      Mitoșeriu, Olga; Ciubotariu, Alina; Benea, Lidia; Ponthiaux, Pierre; Wenger, Francois (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 ...

    • Glow Discharge Optical Emission Spectrometry (GDOES), an Effectiveness Method for Characterizing Composition of Surfaces and Coatings 

      Munteanu, Daniel; Schreiner, Alexander (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 ...

    • Half-Finished Technology of Steels and Fatigue Strength 

      Palaghian, L.; Ciortan, S.; Baicean, S. (Universitatea "Dunărea de Jos" din Galați, 2008)
      The paper presents the bending fatigue testing for four steel brands. The test showed that the fatigue strength is decreasing with the increasing of both ingot size and the rolled sheet thickness. The fatigue strength ...

    • Laser Surface Alloying of Some Steels from SiC Predeposited Powders 

      Levcovici, S.M.; Levcovici, D.T. (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 ...

    • Mechano-Erosion: A Novel Test Methodology to Accelerate Erosion in Rolling Contact Fatigue Experiments 

      Karunamurthy, Balamurugan; Hadfield, Mark (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 ...

    • Modelling by Finite Element Analysis Method of Stress State Establishing for an Alloy Steel 

      Măcuță, Silviu; Bordei, Marian (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 ...

    • Nanostructured Surface for 38MoCrA109 Steel by Nitriding in Nitrogen Atmosphere and Yag;Nd Pulse Laser Activation 

      Cazacu, Nelu; Pintilie, Cătălin; Dobrovici, Sorin; Bâclea, Adolf (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 ...

    • On the Constitutive Equation of a Low Carbon Steel 

      Canănău, Nicolae; Alexandru, Petrică; Ionel, Petrea; Gurău, Gheorghe (Universitatea "Dunărea de Jos" din Galaţi, 2008)
      The paper shows the results of the researches concerning the equation of deformation behavior of low carbon steel. The behavior law is established starting from the experimental torsion moment. The composed constitutive ...

    • Pollutant Emissions, Control and Prevention in the Secondary Copper Industry 

      Ciocan, Anişoara; Baltă, Ştefan (Universitatea "Dunărea de Jos" din Galaţi, 2008)
      This paper presents an analysis of pollutant emissions specifics to copper waste valorization. There are made appreciations of the role and importance which have the characteristics of mixed charge with waste having a ...

    • Research for Realize the Configuration of Wind Energy Turbine 

      Drăgan, Viorel; Drăgan, Mădălina Cristina; Baltă, Ștefan (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 ...

    • Steel and Refractory Chemical Interactions and Mechanical Behavior of Plates for Sliding Gate During Steel Continuous Casting 

      Munteanu, Viorel (Universitatea "Dunărea de Jos" din Galaţi, 2008)
      The main objective to increase CC productivity as well as steel quality by using optimized refractory from ladle-tundish-to-mold lead to techniques that allow the prediction of steel and refractory chemical interactions ...

    • Structural Characteristics in Cobalt Based Alloys 

      Ghiban, Brânduşa; Borţun, Cristina; Ciucă, Sorin (Universitatea "Dunărea de Jos" din Galaţi, 2008)
      In the present paper there are presented results of investigations on samples of partially removable denture made of cobalt base alloys (Co-Cr-Mo) regarding specific structural analysis: determination of structural phases ...

    • Structure Effects Over Behavior of Graphite Gray Iron in Running 

      Preda, Adriana; Rîpă, Minodora; Miculescu, Florin; Dulea, Gabriela (Universitatea "Dunărea de Jos" din Galați, 2008)
      The work aims at emphasizing the structure changes of graphite gray iron, as a result of make-casting conditions and their effects over behavior in running of several cast items. Researches consisted of complex ...

    • Surface Hardening Over 38MoCrA109 Steel by Yag:Nd Pulse Laser 

      Dobrovici, Sorin; Cazacu, Nelu; Sava, Liliana; Baclea, Adolf (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 ...

    • The Modern State of Works in Field of Electron-Beam Technology of Melting and Evaporation of Metals and Non-Metals in a Vacuum 

      Grechanyuk, I.N.; Grechanyuk, N.I.; Croitoru, G. (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, ...

    • The Study of Metal-old Wood Interactions Under the Influence of Pedological Factors 

      Sandu, Ion; Hayashi, Mikiko; Quaranta, Marta (Universitatea "Dunărea de Jos" din Galați, 2008)
      In the manufacture of wood objects, for binding and strengthening were used nails, cramps and other metallic elements, which in the archaeological site suffered degradation and deterioration processes, specific to ...

    • Thermal Analysis of Inoculated Grey Cast Irons 

      Chisamera, Mihai; Stan, Stelian; Riposan, Iulian; Ştefan, Eduard; Costache, George (Universitatea "Dunărea de Jos" din Galaţi, 2008)
      A research was done to investigate the effect of 0.05…0.25wt.% addition rate of Ca, Zr ,Al – FeSi alloy, in ladle and in-mould inoculation of grey cast irons. In the present paper, the conclusions drawn are based on ...