Browsing 2007 fascicula9 nr1 by Issue Date
Now showing items 1-20 of 27
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Study on the Specific Effects of Corrosion processes on Ancient Bronze Artefacts
(Universitatea "Dunărea de Jos" din Galați, 2007)The paper presents the cases of the corrosion processes which take place on starting from the usage period when the primary patina is being formed and when the secondary patina starts, than continuing with the archaeological ... -
Modelling and Prediction in Failure Processes by Mechanical Stresses in Corrosive Environment
(Universitatea "Dunărea de Jos" din Galați, 2007)The complex interaction effect of mechanical stress- mechanical systems and aggressive environment, leads, at dramatic decreasing of their durability and reliability. The analyze of physical-chemical processes such as: ... -
Recycling Possibilities of Metallurgical Slag
(Universitatea "Dunărea de Jos" din Galați, 2007)The target of the current metallurgical industry is to recycle and utilize all their by-products. Slags are the important wastes and by-products of metallurgical industry, which have been treated, recycled and used ... -
Grain Refinement in Aluminum Alloys by Acoustic Cavitation Phenomena
(Universitatea "Dunărea de Jos" din Galați, 2007)In this article, ultrasonic method of transmitting forced vibrations to solidifying aluminum-alloy melts is presented. In the presence of well developed cavitation situations, a fine and homogeneous microstructure has ... -
Steel Flow Control of Continuous Casted Slabs Using Submerged Entry Nozzle Exchange System for Tundish
(Universitatea "Dunărea de Jos" din Galați, 2007)In the steel making process, the continuous casting of molten steel is a very important step which involves hi-tech facilities. The flow control is a very important issue that influences the quality of the final products. ... -
Experimental Researches on the Constitutive Equation of Concrete Steel with Superior Characteristics
(Universitatea "Dunărea de Jos" din Galați, 2007)The plastic deformation behavior is defined by the function of the deformation strength according to the strain, strain rate and temperature as the factor of the deformation process. The behavior law establishes by the ... -
Austenitic Stainless Steels Corrosion Properties Modified by Silicon Alloying
(Universitatea "Dunărea de Jos" din Galați, 2007)In the present paper there are presented results concerning comparative corrosion resistance of some austenitic stainless steels, with or without silicon content. The silicon content is varying in the range of 1-5 %, in ... -
Structure-Properties Corelation in Sintered Hard Alloys with High Toughness and Strength
(Universitatea "Dunărea de Jos" din Galați, 2007)The researches effectuated until now in the field of sintered hard alloys based on metallic carbides have the aim to improve them properties through modifications of existing technologies and by creating other news ones, ... -
Structure and Corrosive Firmness of Composition Materials on the Basis of Copper and Molybdenum got Method Electron-Beam TechnologyB
(Universitatea "Dunărea de Jos" din Galați, 2007) -
The Analysis of the Breaking Susceptibility of Some Feritic Stainless Steel
(Universitatea "Dunărea de Jos" din Galați, 2007)The growth of the world stainless steel conumption was the result of some new domains development, of some demands and special conditions undercooling not only the adaptability of this alloy but also the remarcable range ... -
A study of Electric Properties of Fiber Fabric Based Filled Epoxy Composites
(Universitatea "Dunărea de Jos" din Galați, 2007)Electric and magnetic properties of laminate carbon fiber fabric based epoxy composites are investigated through experimental techniques. Various concentrations of powder fillers were used in order to change the basic ... -
Experimental and Theoretical Investigations on Mode I Crack Propagation in Notches Under Cyclic Loading
(Universitatea "Dunărea de Jos" din Galați, 2007)Research works regarding crack opening stresses covering various types of Mode I cracks initiated and growing in notches under cyclic loading are shown. A large number of parameters influence the crack opening behavior, ... -
Granularly unbind Materials for Casting Composite Moulds
(Universitatea "Dunărea de Jos" din Galați, 2007)This paper present some partial result based on this idea (of pollution prevention) the domain of making composite-casting moulds (in time of casting, solidifying, and alloy cooling). Casting process impose temporary or ... -
Reduction Rate of Remanent Stress in Thermal Spraying Depositions by Shot Peening
(Universitatea "Dunărea de Jos" din Galați, 2007)Thermal electric-arc spraying coatings are widely utilized both to get new parts ant to repair the used ones. Just like with the other thermal spraying procedures, the other thermal spraying procedures, the thickness of ... -
Values of the Solutal Marangoni Number in Very Dilute Fe-C-O Solutions at 1873K
(Universitatea "Dunărea de Jos" din Galați, 2007)Low carbon, aluminum killed steels are well represented by the adequate part of the Fe-C-O system, where are available useful experimental data, regarding the surface tension and viscosity. The reference dynamic ... -
Two-Way Shape memory Effect in a Cu-13wt. %Al-4 wt.%Ni Shape Memory alloy by the Thermo-Mechanical Cycling Method
(Universitatea "Dunărea de Jos" din Galați, 2007)A Cu - 13 % wt Al 4% wt Ni polycrystalline shape memory alloy has studied with a thermo mechanical cycling method. The two – way shape memory effect (TWSME) was obtained bending the alloy around a cylinder mold and by ... -
X-Ray Diffraction Residual Stress Measurements for Quality Control Testing
(Universitatea "Dunărea de Jos" din Galați, 2007)This paper present the primary difficulties which are associated with the obtaining and interpreting surface X-ray diffraction residual stress results: the surface stresses may be identical for the shoot peening, nitriding ... -
New Welding Techology-The Cold Welding on Cogged Surfaces
(Universitatea "Dunărea de Jos" din Galați, 2007)Welding by cold pressing on cogged surfaces, produces the joint of a component made from an easy deformable metal by pressing on the cogged surface of a harder metal component. Different welds between aluminium (the ... -
Study of Tribocorrosion Processes by Electrochemical Techniques
(Universitatea "Dunărea de Jos" din Galați, 2007)Tribocorrosion is defined as the chemical-electrochemical-mechanical process leading to a degradation of materials in sliding, rolling or erosion contacts immersed in a corrosive environment. That degradation results ... -
Researches on the Pollution of Underground Waters in a Certain Part of Galati District
(Universitatea "Dunărea de Jos" din Galați, 2007)The paper underlines the importance of monitoring the quality of the underground waters and presents the experimental results as regards the pollution of underground waters in a certain part of Galati district. The final ...
