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  • Hydrogen assisted cradcking  (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: 2. A revision of K-dominance (1997)
    Springer
    International journal of fracture 88 (1997), S. 247-258 
    Details
    ISSN: 1573-2673
    Schlagwort(e): Hydrogen assisted cradcking ; crack growth rate ; crack tip autonomy.
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract In Part 1 of this work it was shown that, because of the coupling of the processes of crack growth and hydrogen accumulation in rupture sites, the crack growth kinetics curve v= v(K) in hydrogen assisted cracking (HAC) does not possess intrinsic uniqueness as a material's characteristic curve. This paper presents an analytical treatment of the phenomenon and a special regime of steady-state crack growth is seen to exist for which hydrogen assisted cracking turns out to be a K-dominated process. The corresponding plot of the steady-state v against K acquires the uniqueness of a material's characteristic curve which may be used in engineering to provide more conservative evaluation of material resistance and structural integrity in HAC conditions. Inherent uncertainties in the customary fracture mechanics approach to HAC are analysed in an attempt to guide the way towards its further refinement.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1007402301554
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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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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