• Characterization of Thick Hard Layers with ni-Cr-B-Fe-Al Alloy Obtained by Laser Cladding 

      Drugescu, Elena; Boiciuc, Simona; Gheorghieș, Constantin (Universitatea "Dunărea de Jos" din Galați, 2009)
      To increase the resistance to wear and corrosion of the surface layers made from steel with 0.45% C, multilayer deposition was tested by injection of powder with chemical composition of 8.9% Cr, 4.5% Fe, 5.1% B, 2, 4% ...
    • Choosing and Using Rationally the Thermic Processed Steels 

      Potecașu, Octavian; Potecașu, Florentina (Universitatea "Dunărea de Jos" din Galați, 2012)
      On a global scale one can notice a constant preoccupation for a rational choosing and using of the materials on the whole and, especially of the steels with the main objective the increase of the machines’, equipment’ ...
    • Conductive-Atomic Force Microscopy Investigation of the Electrical Properties of Low Temperature Deposed ZnO Transparent thin Films 

      Alexa, A.; Pimentel, T.; Calmeiro, A.; Istrate, A.; Fortunato, E.; Mușat, V. (Universitatea "Dunărea de Jos" din Galați, 2015)
      The paper presents the investigation by conductive-atomic force microscopy (C-AFM) of the variation of the local conductivity and topography of the transparent ZnO thin films deposed onto soda lima glass substrates by ...
    • EDX Analysis of Laser Cladding Layers with Ni-Cr-B-Fe-Al Alloy 

      Boiciuc, Simona; Drugescu, Elena; Miculescu, Florin; Cantaragiu, Alina (Universitatea "Dunărea de Jos" din Galați, 2009)
      Multilayer cladding by injection of powder with 8.9% Cr, 4.5% Fe, 5.1% B, 2.4% Al, 0.6% Cu, Ni rest as chemical composition, in melted bath by a continuous wave CO2laser connected to x-y-z coordinate table was tested in ...
    • Examining the Evolution of Microstructure and ITS Effect on the Mechanical and Tribological Properties 

      Constantinescu, Stela (Universitatea "Dunărea de Jos" din Galați, 2017)
      This paper investigates the superior frictional performance of Ti-DLC films, by examining the evolution of microstructure and its effect on the mechanical and tribological properties. The superior frictional performance ...
    • Laser Cladding of Ni-Cr-B-Fe_Al Alloy on a Steel Support 

      Levcovici, Sanda Maria; Levcovici, Dan Teodor; Gheorghieș, Constantin; Boiciuc, Simona (Universitatea "Dunărea de Jos" din Galați, 2005)
      Multilayer coating by injection of powder with 8.9% Cr, 4.5% Fe, 5.1% B, 2.4% Al, 0.6% Cu; all reminded of Ni, as chemical composition, in melted bath by CO2 continuous wave laser connected to x-y-z coordinate table was ...
    • Laser Deposition of Bronze Aluminum on Steel Support 

      Boiciuc, Simona (Universitatea "Dunărea de Jos" din Galați, 2015)
      In order to rise the wear and corrosion resistance of 0.45% C superficial steel layers, a multilayer coating was tested by injection of powder with 88.3% Cu; 9.5% Al; 2.2% Fe in melted bath by CO2 continuous wave laser. ...
    • 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 ...
    • Laser Surface Hardening of 51Crv4 Steel 

      Levcovici, Sanda Maria; Levcovici, Dan Teodor (Universitatea "Dunărea de Jos" din Galați, 2005)
      The work presents the surface changes in microstructure and properties by quenching the 51CrV4 steel from liquid and solid phase, using a CO2 continue laser wave with 900W power. In order to determine the hardening ...
    • Microstructural Characteristics of Sintered Powder Metallurgy Alloys 

      Marin, Mihaela; Potecaşu, Florentina; Potecaşu, Octavian (Universitatea "Dunărea de Jos" din Galaţi, 2014)
      The purpose of this paper is to study the influence of processing parameters on the microstructural characteristics of sintered powder metallurgy alloys. The specimens were produced from atomised iron powders with different ...
    • Microstructural Characterization of the TiMoZrTa Alloy 

      Bălțatu, Mădălina Simona; Cimpoeșu, Ramona; Vizureanu, Petrică; Achiței, Dragoș Cristian; Minciună, Mirabela Georgiana (Universitatea "Dunărea de Jos" din Galați, 2015)
      In recent years, different types of titanium alloys have been investigated with the aim of using materials in biomaterials field, and Ti-Mo system alloys are very promising materials. Alloying titanium with biocompatible ...
    • Modification of Surface Properties by Laser Cladding with Ni-Cr-B-Fe-Al Alloy 

      Boiciuc, Simona; Spânu, Constantin (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      The paper is focused on modification of surfaces properties by laser cladding. To follow the corrosion behavior in different media of laser cladding layers made of nickel based alloy Ni - Cr - B - Fe - Al. It was studied ...
    • Ni-P Coating on Steel Support by Electroless Method 

      Radu, Tamara; Dobrea, Andreea Georgiana (Universitatea "Dunărea de Jos" din Galați, 2017)
      The autocatalytic reduction method (electroless method) was applied to obtain the Ni-P layers with different P contents. Nickel sulfate was used as nickel ion source and as reducing agent the sodium hypophosphite. The ...
    • Physical-Mechanical and Technological Characteristics of Ti10Zr Alloy for Dental Applications 

      Vasilescu, Vlad Gabriel; Vasilescu, Elisabeta (Universitatea "Dunărea de Jos" din Galați, 2016)
      Progress reported over time in dentistry can be attributed largely to the dynamics of acquiring new materials. A biomaterial is considered ideal in the absence of any biomaterial-tissue interaction, which means a biomaterial ...
    • Structuras of the Eutectoid Zn-Al Alloy Obtained by Directed Solidification 

      Agapie, Mirela; Varga, Béla (Universitatea "Dunărea de Jos" din Galați, 2014)
      This work analyses the structure of the eutectoid Zn-Al based alloy directionally solidified, with cooling rates ranging between 8.5-0.4 oC/sec. During cooling, the temperature gradient in the liquidus zone, respectively ...
    • Studies and Research Obtaining Bronze Filters Using Powder Metallurgy Methods 

      Boiciuc, Simona; Alexandru, Petrică (Universitatea "Dunărea de Jos" din Galați, 2015)
      The article presents how to obtain porous bronze products using copper - based powder by powder metallurgy methods. The formation of tablets was done by free pouring the spherical powder into the mould, followed by their ...
    • Study of the Sintering Process of Iron Powders Coated with Nano-Hydrocarbon and the Resulting Microstructure at Temperatures up to 1200°C 

      Georgiev, Jordan; Anestiev, Lubomir; Bendereva, Ekaterina; Lukarski, Yavor; Marcela, Selecka; Gavrilova, Rositsa (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 ...
    • The Influence of Cold Rolling on the Microstructure for Drawing Steels 

      Potecașu, Florentina; Potecașu, octavian; Drugescu, Elena; Alexandru, Petrică; Istrate, Miltiade; Hanganu, Doru (Universitatea "Dunărea de Jos" din Galați, 2007)
      The paper presents the structural changes that appeared in steel for deep drawing, as a result of cold rolling and of recrystallization thermal treatment. The research was conducted on samples taken from the rolled strap, ...