Afișează articolele 1-20 of 3773

    • The Corrosion Behaviour of Aluminum Alloy 2024-T3 in Acidic Environments 

      Hotea, Vasile; Juhasz, Jozsef; Pop, Elena; Iepure, Gheorghe; Pop, Aurica (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      This research aimed at analysing the acidic corrosion behavior of aluminum alloy 2024-T3 commonly used in the aerospace. We study the variation of corrosion rate with immersion time at different values of H2SO4 concentration ...
    • Influence of Micro Glass Beads Added in PBT Matrix on the Mechanical Properties of Composites 

      Botan, Mihail; Georgescu, Constantin; Deleanu, Lorena (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      This paper presents the influence of adding materials (micros glass spheres) in a matrix of PBT on several mechanical properties: elasticity modulus, stress at break , elongation at break, energy at break. The mechanical ...
    • Physico-Chemical Water Treated with Sonic Generatir and Al2(SO4) Coagulant 

      Şerban, Anca; Bordei, Marian; Ciurea, Aurel; Burtea, Mariana Carmen (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      This paper is a study on the problem of using ultrasound in the treatment of raw water. It highlights the effect of ultrasounds produced by the experimental sonic ultrasound generator through the physico-chemical analysis ...
    • Increase the Steels Purity cast in Vacuum 

      Mincu, Valentin; Constantin, Nicolae (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      The need to develop products with special characteristics and high mechanical properties led to the introduction of plastic deformation of semifinished materials. Special purpose products are produced from slabs, ...
    • The Dental Technology in Art Foundry 

      Florea, Gheorghe; Doniga, Ana; Florea, Bogdan (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      The paper presents results of a study undertaken to implement the dental casting technique of small parts characterized by extremely complex drawings of surfaces and thicknesses reduced specific objects. During the study ...
    • Performance Management System for purifyng Polluted Industrial Water 

      Dragomir, Ştefan; Dragomir, Georgeta; Bordei, Marian (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      In this paper we show an integrate system of water management and an efficient solution that is a floating dock, placed in the harbour area. Water quality is one of the most important elements for life support and ...
    • The Influence of Steam Treatment on Mechanical Properties and Abrasive Wear Behavior of Sintered P/M Steels 

      Marin, Mihaela; Potecaşu, Florentina; Drugescu, Elena; Potecaşu, Octavian; Alexandru, Petrică (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      In this paper is a study of the influence of steam treatment on sintered P/M steels, for three different types of powder. The abrasive wear of steam-treated sintered iron is analysed by abrasion tests. The specimens were ...
    • Neutralization of Hazardous Waste in Vitreous Mass of Glass 

      Vlad, Maria; Movileanu, Gelu; Marcus, Iuliana; Florea, Gheorghe; Cantaragiu, Alina (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      The paper presents studies concerning the neutralization of hazardous waste containing metal ions by embedding them in vitreous matrix which are chemically stable materials. The main analysed factors are: chemical ...
    • Investigation of Corrosion Protection by Chemically Applied Patina on Artistic Bronzes 

      Sabău (Chelaru), J.D.; Mureşan, L.M.; Soporan, V.F.; Nemeş, O.; Kolozsi, T. (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      Increase of pollution in recent years, requires monitoring of the corrosion behavior of artistic bronzes coated with syntetic patina, in urban atmosphere. This present work aims to investigate the corrosion rezistance ...
    • Study for Evaluation and Optimization of Mineral Composition and Structure of Iron Ore Granulation in Sintering Process 

      Mogoş, Paul Petruş; Constantin, Nicolae; Ittu, Sînziana; Anca, Denisa-Elena; Harcea, Lavinia-Marilena (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      The characterization of iron ore particles is of vital importance for the study of mineral composition. The specific surface area of iron ore particles can be measured by laser diffraction, and mathematical models (based ...
    • Microstructural Evolution of al 1100 Aluminum Subjected to Severe Plastic Deformation 

      Gurău, Gheorghe; Gurău, Carmela (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      The goal of this document is to promote a sequence of bulk-deformation processes able to produce ultrafine grain and also nanostructured wires with adequate length to be interesting for processing in metallurgical industry. ...
    • Properties of Slags in the System CaO-MgO-Al2O3-SiO2, Important in Deoxidization and Desulphurization of Low Carbon Aluminium Killed Steels 

      Niţă, Petre Stelian (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      Properties of refing slags belonging to the system CaO-MgO-Al2O3-SiO2 are important in simultaneous or succesive refinig treatment processes in the ladle and other refing metalurgical reactors. The efficiency of treatments ...
    • Aluminum Foams with Closed Pores Obtained by Casting Techniques 

      Geamăn, Virgil; Pop, Mihai Alin; Jiman, Vasile (Universitatea 'Dunărea de Jos" din Galați, 2012)
      Techniques for the preparation of metallic foams, including casting, powder metallurgy and metallic deposition, have been reviewed. There is a present interest in the development of materials capable of plastic deforming ...
    • Selective Growth of 1D Nanostructured Oxide Materials Using PDMS Stamp 

      Danciu, Anca-Ionela; Mușat, Viorica; Busani, Tito; Gonçalves, Alexandra; Pinto, Joana V.; Costa, Mafalda; Bernacka-Wojcik, Iwona; Martines, Rodrigo; Fortunato, Elvira (Universitatea "Dunărea de Jos" din Galați, 2012)
      The approach for selective growth of 1D nanostructured oxide materials using poly (dimethylsiloxane) (PDMS) stamp consists of using microcontact printing, as such the soft lithography technique, for transferring the ...
    • Aspects Regarding the Tradition of Bell Manufacture and USE 

      Carcea, Ioan; Bălțătescu, Oana; Floarea, Raluca-Maria (Universitatea "Dunărea de Jos" din Galați, 2012)
      The paper presents the casting art of bells, their spiritual significance, as well as their evolution over time. The bells may be made of both metallic or/and nonmetallic materials, of various shapes and sizes. While ...
    • Influence of Normale Loads on Corrosion Behaviour of Ti-6Al-4V Alloy During Fretting in Artificial Saliva 

      Mardare, Eliza; Benea, Lidia; Celis, Jean-Pierre (Universal "Dunărea de Jos" din Galați, 2012)
      The fretting corrosion behaviour of untreated Ti-6Al-4V alloy in artificial saliva solution was evaluated based on the change in open circuit potential (OCP) measured as a function of time. Fretting corrosion experiments ...
    • Vibrations and Torque Monitoring Processes for a Cold Rolling Mill 

      Dragomir, Ştefan; Diaconu, Nicolae; Bordei, Marian (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      This paper presents researches made on a system of monitoring and other parallel systems for diagnose used in a cold rolling mill. The first system (with specific measurement sensors) is an online vibration monitoring ...
    • Characterisation of CVD Niobium Carbine Coatings on Hard Carbide Substrate 

      Constantinescu, Stela; Vlad, Maria; Radu, Tamara (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 ...
    • Obtaining and Characterizing TIN-LEAD Coatings on Steel Band 

      Radu, Tamara; Ciocan, Anişoara; Vlad, Maria (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      The experimental research was at the basis of the hot immersion coating technology with Sn-Pb alloy of the steel bands presented in the study. The characterization of these layers was achieved through microscopic analyses ...
    • Composition of Syngas Produced by Gasification of Agricultural Residue Briquettes 

      Tasma, Daniela; Panait, Tănase; Uzuneanu, Krisztina; Mocanu, Cătălin; Buţurcă, Raluca-Cristina (Univesitatea "Dunărea de Jos" din Galaţi, 2012)
      This paper summarizes the results of an experimental study on the gasification of briquettes made from different agricultural residues. There were investigated the effects of operating parameters such as temperature and ...