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Перегляд Проблемы прочности, 2008, № 1 за назвою

Репозиторій DSpace/Manakin

Перегляд Проблемы прочности, 2008, № 1 за назвою

Сортувати за: Порядок: Результатів:

  • Deformation resistance and structure-forming processes of iron aluminides in hot rolling 
    Suchanek, P.; Schindler, I.; Kratochvil, P.; Hanus, P. (Проблемы прочности, 2008)
    We have developed simple mathematical models of mean equivalent stress dependence on temperature and strain for selected iron aluminides. Four similar melts with 16.5-19.2 wt.% of Al, 4 wt.% of Cr and with various contents ...
  • Duplex surface treatment of stainless steel X12CrNi 18 8 
    Kadlec, J.; Dvorak, M. (Проблемы прочности, 2008)
    Described technology of stainless steel duplex surface treatment is based on the plasma nitriding of the component in micropulse plasma and subsequent coating by Ni and composite Ni/diamond film. The formed duplex coating ...
  • Elastic properties of B19’ structure of NiTi alloy under uniaxial and hydrostatic loading from first principles 
    Sestak, P.; Cerny, M.; Pokluda, J. (Проблемы прочности, 2008)
    The uniaxial and hydrostatic deformations of martensitic structure B19’ of NiTi shape memory alloy are studied using first-principles calculations. The bulk and Young’s moduli and the theoretical strength under uniaxial ...
  • Estimation of anisotropy of mechanical properties in Mg alloys by means of compressive creep tests 
    Dobes, F.; Perez, P.; Milieka, K.; Garces, G.; Adeva, P. (Проблемы прочности, 2008)
    A detailed knowledge of dependence of mechanical properties on orientation in materials prepared by directional processes may present an important factor influencing the design of construction parts. Toward this end, the ...
  • Failure of Zr50 Ti16.5 Cu15 Ni18.5 amorphous metallic ribbon 
    Miskuf, J.; Csach, K.; Jurikova, A.; Ocelik, V.; Bengus, V.; Tabachnikova, E. (Проблемы прочности, 2008)
    The deformation and fracture behavior of Zr50Ti165Cu15Ni185 bulk amorphous metal in the form of a thin ribbon have been determined in tensile test at room temperature. The fracture is localized in a major shear band and ...
  • Fatigue behavior of dissimilar friction stir welds between cast and wrought aluminum alloys 
    Uematsu, Y.; Tozaki, Y.; Tokaji, K.; Nakamura, M. (Проблемы прочности, 2008)
    Cast aluminum alloy, AC4CH-T6, and wrought aluminum alloy, A6061-T6, werejoined by means of friction stir welding (FSW) technique. The effect of microstructure and post heat treatment on fatigue behavior of the dissimilar ...
  • Fatigue lifetime of ADI from ultimate tensile strength to permanent fatigue limit 
    Zapletal, J.; Vechet, S.; Kohout, J.; Obrtlik, K. (Проблемы прочности, 2008)
    S — N curve of austempered ductile iron was obtained in the range of lifetime including low cycle fatigue domain and high cycle fatigue domain up to 108 cycles. Ultimate tensile strength is used as a limiting value of the ...
  • Fracture toughness of multilayer pipes 
    Nezbedova, E.; Fiedler, L.; Majer, Z.; Vlach, B.; Knesl, Z. (Проблемы прочности, 2008)
    Multilayer pipes composed of various materials improve partially the properties of a pipe system and are frequently used in service. To estimate the lifetime of these pipes the basic fracture parameters have to be measured. ...
  • Grain boundary influence during short fatigue crack growth using a discrete dislocation technique 
    Hansson, P.; Melin, S. (Проблемы прочности, 2008)
    We have studied the effect of a grain boundary in front of a short edge crack on its propagation under cyclic loading conditions in bcc iron. The used model is a combination of a discrete dislocation formulation and a ...
  • Hot-cracking of high-alloyed steels evaluated by wedge rolling test 
    Schindler, I.; Suchanek, P.; Rusz, S.; Kubecka, P.; Sojka, J.; Heger, M.; Liska, M.; Hlisnikovsky, M. (Проблемы прочности, 2008)
    We present a new methodology of determination of hot-cracking f metallic materials, which is based on laboratory application of the wedge rolling test and computer processing of the results obtained. The experiment was ...
  • Influence of carbides morphology on fracture toughness of cast steel G200CrMoNi4-3-3 
    Stradomski, Z.; Pirek, A.; Dyja, D. (Проблемы прочности, 2008)
    We analyze the influence of small modification of chemical composition of G200CrMoNi4-3-3 cast steel on the morphology of carbides and on material crack resistance. Using the Termo-Calc software the volume fraction of ...
  • Influence of nitriding on the fatigue behavior and fracture micromechanisms of nodular cast Iron 
    Konecna, R.; Nicoletto, G.; Majerova, V.; Baicchi, P. (Проблемы прочности, 2008)
    Surface modification processes are increasingly used to fully exploit material potential in fatigue critical applications because fatigue strength is sensitive to surface conditions. Nitriding is extensively adopted with ...
  • In-service fatigue fracture mechanisms in covered disks of a TV3-117VK helicopter turbine engine 
    Shanyavskii, A.A.; Potapenko, Yu.A. (Проблемы прочности, 2008)
    In-service propagatingfatigue cracks were examined in EI-698VD superalloy thin turbine covered disks ofthefirst, second, and third stages ofa TV3-117VK helicopter engine within service lifes of 200-1800 h. To reveal causes ...
  • In situ scanning electron microscopy study of fatigue crack propagation 
    Jacobsson, L.; Persson, C.; Melin, S. (Проблемы прочности, 2008)
    The fatigue crack propagation rate is influenced by various mechanisms at the very vicinity of the crack tip, e.g., local plasticity and/or creep, microcracking, crack branching, and crack closure induced by plasticity and ...
  • Localization of plastic deformation and fracture in aluminum polycrystals 
    Zarikovskaya, N.V.; Zuev, L.B. (Проблемы прочности, 2008)
    The effect of the grain size as a basic structural parameter on plastic strain macrolocalization has been studied for polycrystalline aluminum. The mathematical form of the above dependence has been verified. The limiting ...
  • Mechanical behavior of Zr-based bulk metallic glasses 
    Nowak, S.; Ochin, P.; Pasko, A.; Guerin, S.; Champion, Y. (Проблемы прочности, 2008)
    Bulk metallic glasses have a very high corrosion resistance and mechanical strength. Bulk metallic glasses show elastic-perfectly plastic behavior with an extended region of elastic strain (≈ 2%). But at room temperature ...
  • Mechanical properties and fracture behavior of high-strength steels 
    Musalek, R.; Hausild, P.; Siegl, J.; Bensch, J.; Slama, J. (Проблемы прочности, 2008)
    Typical thicknesses ofhigh-strength steels (HSS) sheets used in the car industry are inapplicablefor standardized testingprocedures. The aim ofthis study is topropose an appropriate methodologyfor testing and comparing of ...
  • Mechanisms of Fracture in Neutron-Irradiated 15Ch2MFA Steel 
    Valek, S.; Hausild, P.; Kytka, M. (Проблемы прочности, 2008)
    The influence of irradiation on fracture properties of 15Ch2MFA pressure vessel steel is studied. The distribution of inclusions and carbides is characterized. The quantitative fractography of broken Charpy specimens is ...
  • Method for low-cycle fatigue life assessment of metallic materials under multiaxial loading 
    Shukaev, S.; Gladskii, M.; Zakhovaiko, A.; Panasovskii, K. (Проблемы прочности, 2008)
    A new method of fatigue life assessment under multiaxial low-cycle regular and irregular loading is proposed, which is based on the modified Pisarenko-Lebedev criterion, the linear damage accumulation hypothesis, and the ...
  • Microstructural and fracture analysis of aged cast duplex steel 
    Dyja, D.; Stradomski, Z.; Pirek, A. (Проблемы прочности, 2008)
    The effect of increased carbon content and heat treatment parameters on the microstructure and selected properties of ferritic-austenitic duplex cast steel is discussed. Test results show that the cast steel microstructure ...

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