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  • 2005-2009  (3)
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 121-123 (Mar. 2007), p. 1143-1148 
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: Particle’s behavior in the slurry with power-law viscosity shows great effect on the wafersurface polishing. Hydrodynamic pressure is periodically generated on the surface asperity whenparticles are passing through it. Fatigue fracture occurs under the effect of periodical pressure and itbegins from the top to the bottom of the asperity. Based on the energy-balance fracture theory, theremoval rate is calculated and it shows good agreement with experiment data
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 558-559 (Oct. 2007), p. 149-152 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The effect of crystal orientation on the recovery and recrystallization of cold-rolled Ni(99.96% purity) has been investigated. Particular attention was paid to the annealing response ofregions with either the Copper (C), Brass (B) or S rolling texture orientations. Samples with aninitial average grain size of approx. 500μm were deformed to strains of up to εvM = 4.5. As a resultof the large initial grain size, even after high rolling reductions it is possible to find sufficiently largeregions of material with similar crystal orientation to analyze the recovery and recrystallizationbehaviour as a function of crystal orientation. Microstructural investigations were carried out in thescanning electron microscope using both electron channeling contrast and electron backscatterdiffraction orientation mapping. Both the S and C orientation regions exhibit a heterogeneousmicrostructure containing bands of localized deformation. The presence of volumes surrounded byhigh angle boundaries in these regions strongly influences both the recovery and recrystallizationbehaviour of the material. Twinning was observed also to play an important role in the generation ofrecrystallized grains, with twin chains of up to 3 generations being observed
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 495-497 (Sept. 2005), p. 231-236 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The effect of orientation noise in EBSP data on measurement of percolation thresholdvalues has been investigated by use of computer simulated microstructures. A 2-D Monte Carlo Potts model run on a square lattice of size 200 x 200 was used to generate a microstructure containing approximately 150 grains. Orientations were then assigned to each of these grains to generate single texture component microstructures of differing texture tightness (“model” data). In order to simulatethe effect of orientation noise on the experimental data, the orientation at each point in the 200 x 200 grid was adjusted in a manner consistent with experimental observations of the effect of orientation noise. The model data represent therefore an underlying real grain structure, and the noise-adjusted data represent the orientation map that would be measured using EBSP analysis at a given orientationnoise level. The misorientation angle q70% at which 70% of the grains were percolatively connected was then determined for both the ideal data and for the orientation noise adjusted data. A comparison of the two allows calibration of the extent to which percolation data may be incorrectly estimated by EBSP measurements
    Type of Medium: Electronic Resource
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