| | SLO | ENG | Piškotki in zasebnost

Večja pisava | Manjša pisava

Iskanje po katalogu digitalne knjižnice Pomoč

Iskalni niz: išči po
išči po
išči po
išči po
* po starem in bolonjskem študiju

Opcije:
  Ponastavi


1 - 5 / 5
Na začetekNa prejšnjo stran1Na naslednjo stranNa konec
1.
Exergy analysis of a Brayton cycle with variable physical properties and variable composition of working substance
Marija Živić, Antun Galović, Jurij Avsec, Mario Holik, 2016, izvirni znanstveni članek

Opis: The exergy analysis of a Brayton cycle is performed in the paper. The four input variables: the ratio of the compressor exit and inlet pressures, the ratio of inlet temperature of gases in turbine and inlet temperature of air in compressor and the isentropic efficiencies of the compressor and turbine are analysed. The temperature ratio is varied in a way that the compressor inlet temperature of air is maintained constant, while the turbine inlet temperature of flue gases is varied from 900 to 1200°C. In the combustion chamber methane is completely combusted with excess air ratio which is determined by the temperature of flue gases at the turbine inlet. The analysis further includes variability of the molar heat capacities of air and flue gases with temperature and variability of their heat capacity ratios. The exergy destruction in turbine, compressor and combustion chamber and also total exergy efficiency of the cycle are considered in the analysis.
Ključne besede: Brayton cycle, variable physical properties, variable composition of working substance, maximum work output, maximum thermal efficiency
Objavljeno: 12.07.2017; Ogledov: 1207; Prenosov: 259
.pdf Celotno besedilo (789,62 KB)
Gradivo ima več datotek! Več...

2.
Weldability prediction of high strength steel S960QL after weld thermal cycle simulation
Marko Dunđer, Tomaž Vuherer, Ivan Samardžić, 2014, izvirni znanstveni članek

Opis: This paper presents weld thermal cycle simulation of high strength steel S960QL, and describes influence of cooling time t8/5 on hardness and impact toughness of weld thermal cycle simulated specimens. Furthermore, it presents analysis of characteristic fractions done by electron scanning microscope which can contribute to determination of welding parameters for S960QL steel.
Ključne besede: high strength steels, S960QL steel, weldability, weld thermal cycle simulation, hardness, toughness
Objavljeno: 03.07.2017; Ogledov: 2050; Prenosov: 99
.pdf Celotno besedilo (1,16 MB)
Gradivo ima več datotek! Več...

3.
The microstructure and properties of materials at the fusion line
Vladimir Gliha, 2005, izvirni znanstveni članek

Opis: In this paper, the formation of the HAZ that is caused by the thermal effects of welding is investigated from the theoretical and experimental points of view. Samples of the material found at the fusion line were prepared by simulating the thermal regimes that occur during welding. A number of CCT diagrams that are valid for the conditions during welding were designed, and the hardness and impact-toughness of the samples were measured. This information was then related to the results of metallographic examinations. The maximum temperature and the cooling rate of the applied thermal cycles were found to be decisive in terms of the properties of HAZ.
Ključne besede: welding, HAZ, thermal cycle, cooling rate, fusion line
Objavljeno: 03.07.2017; Ogledov: 1404; Prenosov: 88
.pdf Celotno besedilo (270,09 KB)
Gradivo ima več datotek! Več...

4.
Impact energy analysis of quenched and tempered fine grain structural steel specimens after weld thermal cycle simulation
Marko Dunđer, Tomaž Vuherer, Ivan Samardžić, 2014, izvirni znanstveni članek

Opis: The paper presents impact energy results of thermal cycle simulated specimens of quenched and tempered fine grain structural steel S960QL. These results are obtained by examining notched Charpy specimens. Upon performed metallographic analysis and measured hardness, total impact energy is separated into ductile and brittle components.
Ključne besede: quenched and tempered fine grain structural steel, welding thermal cycle, impact energy, cooling time t8/5
Objavljeno: 03.07.2017; Ogledov: 567; Prenosov: 74
.pdf Celotno besedilo (1,18 MB)
Gradivo ima več datotek! Več...

5.
Weldability investigation of TStE 420 after weld thermal cycle simulation
Marko Dunđer, Tomaž Vuherer, Ivica Kladarić, 2010, izvirni znanstveni članek

Opis: The paper presents a short description and overview of the weld thermal cycle simulation methods. An experimental investigation on the weld cycle simulated specimens is predicted by a plan of experiment using single cycle simulation. The obtained hardness results are compared with double cycle simulated specimens results of individual points in the heat-affected zone. Beside that, the characteristic microstructures of points in the heat-affected zone after a single weld thermal cycle simulation are given. A thermal simulation method is suitable for different weldability examinations. In this paper, the authors would like to investigate the maximal hardness of individual points in the weld joint what is important when considering cold cracking sensitivity.
Ključne besede: HSLA steels, weldability, weld thermal cycle simulation, hardness
Objavljeno: 31.05.2012; Ogledov: 1071; Prenosov: 24
URL Povezava na celotno besedilo

Iskanje izvedeno v 0.14 sek.
Na vrh
Logotipi partnerjev Univerza v Mariboru Univerza v Ljubljani Univerza na Primorskem Univerza v Novi Gorici