2009 fascicula9 nr2: Recent submissions

Afișează articolele 21-32 of 32

    • Experimental Research Regarding the Obtaining of Obtaining of Friction Elements 

      Petrea, Ionel; Bașliu, Vasile; Petrea, Ionel; Bașliu, Vasile (Universitatea "Dunărea de Jos" din Galați, 2009)
      Friction materials are used as bimetallic friction elements, consisting of a friction material layer sintered on a steel backing. Using the electron microscopy techniques (microprobe analyzer) some of the diffusion ...

    • Corrosion Behaviour of Tombac Used in Cult Objects Manufacturing 

      Hagioglu, P.; Gheorghieș, c.; Cantaragiu, A.M.; Boiciuc, R.; Țigău, N. (Universitatea "Dunărea de Jos" din Galați, 2009)
      Corrosion of metals and metallic alloys is due to their thermodynamic instability in relation to their oxidation form. Corrosion tests performed in this work simulate the exposure conditions in different environments of ...

    • Variation of Mechanical Characteristics for Thin Wall Tubes Processed in Ultrasonic Field 

      Susan, Mihai; Achiței, Cristian; Ștefanică, Roxana Gabriela; Gavrilă, Bogdan Lucian (Universitatea "Dunărea de Jos" din Galați, 2009)
      The paper presents the variation of mechanical characteristics of resistance and plasticity for thin wall tubes made of stainless steel 10TiNiCr180, processed in ultrasonic field. Decrease of mechanical characteristics ...

    • Redesigning a Jaw Crusher Using Value Analysis. Part II 

      Chichernea, Florin; Chichernea, Alexandru (Universitatea "Dunărea de Jos" din Galați, 2009)
      The paper presents a complete study of VALUE ANALYSIS applied concretely to a selected piece of equipment. The phases and ITERATIVE operation of the Value Analysis method are presented. Value Analysis combines both ...

    • The temperature Effect on Severely Deformed Aluminium by High Pressure Torsion 

      Gurău, Carmela; Gurău, Gheorghe; Cănănău, Nicolae; Potecașu, Florentina; Dogaru, Victor; Fernandes, FM Braz (Universitatea "Dunărea de Jos" din Galați, 2009)
      The process of deforming materials started to attract the interest of the researchers after the development of the severe plastic deformation techniques. A number of aluminium samples were severe deformed by HPT method ...

    • Establishing the Constitutive Law of a CrMo Alloyed Steel 

      Cănănău, Nicolae; Alexandru, Petrică; Gurau, Liviu; Gurău, Gheorghe (Univrsitatea "Dunărea de Jos" din Galați, 2009)
      The paper shows the results of the researches for establishing the equation of the deformation behavior of alloyed steel with chromium and molybdenum. The behavior law is established in the experimental way, using the ...

    • Study of Zro2/Co-Deposition with Cobalt from Chloride Electrolyte 

      Benea, Lidia; Sorcaru, Florentina Simona (Universitatea "Dunărea de Jos" din Galați, 2009)
      The metal-matrix composites are materials in which the properties of a metallic host material are modified with addition of a second phase (ceramics) by electrodeposition process. The second phase can be hard oxides or ...

    • Researches on the Corrosion Behavior for a Drawing Steel That Went Through Natural Ageing 

      Potecașu, Florentina; Potecașu, octavian; Ioniță, Elena; Ciubotariu, Alina (Universitatea "Dunărea de Jos" din Galați, 2009)
      The paper presents the results of a study on the corrosion behaviour of the sheets of drawing steel with 0,04% C gone through natural ageing and run for a period of 112 days from the moment of drawing. The researches ...

    • On the Corrosion Behavior of Organic Nanocomposite Coatings 

      Gheorghieș, Constantin; Gheorghieș, Livia; Oancea, Constantin; Hagioglu, Petrica (Universitatea "Dunarea de Jos" din Galați, 2009)
      Recently, researches on composite coatings of organic nature with the addition of metallic oxide nanopowders have shown an increasing corrosion resistance of metallic materials. Carbon steel shows an improved behavior ...

    • Morphological Aspects and Corrosion Behaviour of Phenol Formaldehyde/Zn Composite Coatings 

      Ciubotariu, Alina-Crina; Benea, Lidia; Mitoșeriu, Olga; Ponthiaux, Pierre; Wenger, François (Universitatea "Dunărea de Jos" din Galați, 2009)
      The present work has the purpose of studying morphological aspects and corrosion behaviour of pure zinc and composite coatings having zinc as metal matrix and phenol – formaldehyde resin type Novolac (RESITAL 6358/1) ...

    • X-Ray Diffraction Analysis at Ultrasonic Welding 

      Dumitrache, Constantin; Bărhălescu, Mihaela; Sabău, Adrian; Comandar, Corneliu (Universitatea "Dunărea de Jos" din Galați, 2009)
      In the article [2] the author present experimental investigations regarding of residual stress distribution in weld bead vicinity of submerged arc welded naval plates. In this way, residual stresses from vicinity of weld ...

    • The Mechanism of Phase Transformation to Obtain Zinc-Iron Coatings 

      Radu, Tamara; Balint, Simion; Mitoșeriu, Olga (Universitatea "Dunărea de Jos" din Galați, 2009)
      Important changes in the ratio of constitutive phases take place during heating of galvanized parts due to Zn coating layer changed into Zn-Fe alloy. The work deals with a mathematical correlation between diffusion ...