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  • Hydrogen assisted cracking  (1)
  • Lens esculenta  (1)
  • manufacturing-induced anisotropy  (1)
  • 1
    Digitale Medien
    Digitale Medien
    The effects of inoculum density and physical factors on the assessment of disease caused by Sclerotium rolfsii (1992)
    Springer
    Plant and soil 142 (1992), S. 107-112 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Inoculum density ; Lens esculenta ; methodology ; Sclerotium rolfsii ; soil borne pathogens ; southern blight
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract Greenhouse and laboratory experiments were conducted to determine the effects of various physical factors on the assessment of disease caused by Sclerotium rolfsii using field and artificially infested soils. Lentil(Lens esculenta Moench) seedlings growing in trays or pots with sand were inoculated by surrounding them with a layer of soil infested with the pathogen. The number of dead plants was maximal within a 10-day period following inoculation. Seedling mortality increased with the number of sclerotia in the soil to a maximum that depended on seedling spacing, depth of the soil layer, and soil type.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00010180
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    The Effect of History on Hydrogen Assisted Cracking: 1. Coupling of hydrogenation and crack growth (1997)
    Springer
    International journal of fracture 88 (1997), S. 233-245 
    Details
    ISSN: 1573-2673
    Schlagwort(e): Hydrogen assisted cracking ; crack growth rate ; crack tip autonomy.
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract This paper analyzes the effect of process history on K-dominance condition in hydrogen assisted cracking. The performed study of stress-strain assisted diffusion reveals that hydrogenation of the fracture process zone is not a purely K-driven local autonomous phenomenon. Hydrogenation and crack growth are shown to be coupled processes, one influencing the other. Consequently, particular histories of stress intensity factor K and crack size evolutions affect crack growth rate ν that can occur at the same instantaneous K-value in a given material. Thus the crack growth kinetics curve ν=ν(K) is not unique as an intrinsic material property must be.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1007442623667
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  • 3
    Digitale Medien
    Digitale Medien
    Effect of Cold Drawing on Microstructure and Corrosion Performance of High-Strength Steel (1997)
    Springer
    Mechanics of time-dependent materials 1 (1997), S. 307-319 
    Details
    ISSN: 1573-2738
    Schlagwort(e): cold drawing ; high-strength steel ; hydrogen assisted cracking ; manufacturing-induced anisotropy ; pearlite lamellae orientation ; stress corrosion cracking
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract This paper deals with the effect of cold drawing on a high-strength steel in wire form with pearlitic microstructure. Cold drawing produces a preferential orientation of the pearlite lamellae aligned parallel to the cold drawing direction, resulting in anisotropic properties with regard to fracture behaviour in air and aggressive environments (stress corrosion cracking). While the hot rolled bar has a randomly oriented microstructure in both transverse and longitudinal sections, the fully drawn wire presents a randomly oriented appearance in the transverse cross-section, but a marked orientation in the longitudinal cross-section. These microstructural characteristics affect the time-dependent behaviour of the steels when a crack is present in a corrosive or hydrogen environment and influences both the subcritical crack growth rate, the time to failure and the crack propagation path. It is shown that in the strongly drawn steels the crack changes its propagation path, and a micromechanical model is proposed to explain this behaviour.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1009714222132
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