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Перегляд Проблемы прочности, 2008, № 1 за датою випуску

Репозиторій DSpace/Manakin

Перегляд Проблемы прочности, 2008, № 1 за датою випуску

Сортувати за: Порядок: Результатів:

  • Crack initiation and endurance limit of hard steels under multiaxial cyclic loads 
    Bomas, H.; Kienzler, R.; Kunow, S.; Loewisch, G.; Schroeder, S. (Проблемы прочности, 2008)
    The endurance limit and the mechanisms o f fatigue crack initiation in the high cycle regime were investigated using round specimens o f the bearing steel 52100 under longitudinal forces and torsional moments and ...
  • Ab initio DFT study of ideal shear strength of polytypes of silicon carbide 
    Umeno, Y.; Kinoshita, Y.; Kitamura, T. (Проблемы прочности, 2008)
    Ab initio density functional calculations are performed to investigate the ideal shear deformation of SiC poly types (3C, 2H, 4H, and 6H). The deformation of the cubic and the hexagonal poly types in small strain region ...
  • 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 ...
  • 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 ...
  • Constitutive description of creep behavior of Mg-4 Al-1Ca alloy 
    Milicka, K.; Dobes, F. (Проблемы прочности, 2008)
    Creep behavior of an advanced magnesium alloy AX41 (4 wt.% Al, 1 wt.% Ca, Mg balanced) was investigated in temperature interval from 343 to 673 K and stresses from 2 to 200 MPa. Compressive creep experiments with stepwise ...
  • Small punch testing and Its numerical simulations under constant deflection force conditions 
    Dymacek, P.; Milicka, K. (Проблемы прочности, 2008)
    A comparison of results of small punch tests on miniaturized discs under a constant force with their simulation by means of FEM is presented. A heat resistant steel of type CSN 41 5313 (EN 10CrMo9-10) was selected for our ...
  • 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 ...
  • Creep-induced structural changes in Ni-Si-B amorphous alloy 
    Jurikova, A.; Miskuf, J.; Csach, K.; Ocelik, V. (Проблемы прочности, 2008)
    The influence of the stress annealing on the reversible structural relaxation of a Ni-Si-B amorphous ribbon was studied. Creep-induced structural changes in the amorphous structure were derived from anisothermal DSC and ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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. ...
  • Corrosion fatigue behavior of extruded AZ80, AZ61, and AM60 magnesium alloys in distilled water 
    Uematsu, Y.; Tokaji, K.; Ohashi, T. (Проблемы прочности, 2008)
    Rotary bending fatigue tests were conducted in laboratory air and distilled water using three extruded magnesium (Mg) alloys AZ80, AZ61, and AM60 with different chemical compositions. In laboratory air, thefatigue strengths ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...

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