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  • 21
    Electronic Resource
    Electronic Resource
    Effect of an Electric Field on the Texture and Microstructure Evolution during Annealing of High Reduction Cold-Rolled Ni (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 679-682 
    Details
    ISSN: 1013-9826
    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 influence of an electric field on the annealing of high purity (99.999%) cold rollednickel has been investigated. Annealing was carried out for 2 hours at temperatures between 300oCand 800oC with and without an electric field of strength 2.0KVcm-1. The microstructure and fractionof cube texture resulting were characterized using electron backscattering pattern (EBSP) technique.Annealing in an electric field leads to somewhat smaller average values of the cube fraction and grainsizes compared to annealing without an electric field. The highest temperature (800oC) annealing inan electric field results in microstructures with a lower fractional twin boundary length
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.679.pdf
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    Paper (German National Licenses)
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  • 22
    Electronic Resource
    Electronic Resource
    Grain Orientation Dependence of Extended Planar Dislocation Boundaries in Cold-Rolled Polycrystalline Aluminium (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 711-714 
    Details
    ISSN: 1013-9826
    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 dependence on the grain orientation of the alignment of planar dislocationboundaries in plastically deformed metals has been investigated by examining grains of Sorientation ({123}〈63-4〉) in cold-rolled polycrystalline aluminum. For the ideal S orientation the{111} slip plane associated with the highest resolved shear stress lies either at +40° or -40° to therolling direction in the longitudinal section, with two S variants corresponding to each case.Boundary traces in S orientation grains in the rolled sample were examined by the combined use ofelectron channeling contrast imaging and electron backscatter diffraction orientation mapping. Ineach case the +/- sense of the observed planar boundary traces matched that of the {111} slip planewith the highest resolved shear stress showing that the alignment of the boundaries ispredominantly controlled by crystallographic rather than macroscopic considerations
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.711.pdf
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    Paper (German National Licenses)
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  • 23
    Electronic Resource
    Electronic Resource
    EBSD Analysis and Theoretical Prediction of Twin Orientations during Compression in Mg-3Al-1Zn (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 627-630 
    Details
    ISSN: 1013-9826
    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: In order to improve the formability of magnesium alloys at low temperatures, a thoroughunderstanding of the twinning behaviour is required. Cylindrical samples were compressed uniaxiallyfrom room temperature to 250oC, with the compression axis parallel to the transverse direction (TD)of a hot-rolled Mg-3Al-1Zn sheet. Twinning was investigated by use of orientation maps constructedfrom electron backscattered diffraction (EBSD) data. Tensile twinning was observed at alltemperatures. In some grains two twin variants were observed. For each twin the specific twinningvariant among the 6 possible twinning systems was identified by consideration of the twinningrotation. The twinning was then investigated by comparing the specific twin variant with thecalculated Schmid factors for all 6 possible twin variants. In cases of grains that are completelyreoriented by two twin variants it is possible to back-calculate the initial grain orientation byconsidering all possible twin rotations for both of the twin variants. It was found that the operativetwin variants where those with the highest Schmid factors
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.627.pdf
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  • 24
    Electronic Resource
    Electronic Resource
    The Influence of Pre-Annealing on Recrystallization in Heavily Cold-Rolled Nickel (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 703-706 
    Details
    ISSN: 1013-9826
    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: Polycrystalline nickel (99.999% purity) cold-rolled to a reduction of 96% has been givena two-step annealing treatment consisting of a pre-annealing at 180 °C or 220 °C for 2 hours,followed by a final annealing at 300 °C for 10 minutes. The changes in microstructure and textureduring annealing have been followed using electron backscatter diffraction orientationmeasurements taken on the longitudinal section of the samples. The results suggest thatpre-annealing at low temperature can enhance the formation recrystallized grains of cubeorientation. Based on an analysis of the experimental data, possible reasons for the enhancement asa result of pre-annealing in the formation of cube orientation grains are discussed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.703.pdf
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  • 25
    Electronic Resource
    Electronic Resource
    Deformation and Annealing Textures of Extruded and Cold Rolled Pure Ni Single Crystals of Cube Orientation (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 707-710 
    Details
    ISSN: 1013-9826
    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: A pure Ni single crystal of Cube orientation (001)/[100] have been deformed byreversible cold rolling to a reduction of 98% following an initial extrusion treatment. Themicrostructure in the as-deformed samples and in partly recrystallized specimens have beencharacterized in the scanning electron microscope using electron backscattered diffraction (EBSD).Line scans along the normal direction across the sample thickness show some evidence for amacroscopic pattern of subdivision. The EBSD measurements show that the deformed sample ischaracterized by large jumps in orientation between alternating S and Br orientations, related bymisorientation angles of 50°~60°. In part of the sample a background cumulative change inorientation is seen, though local large change in orientation are also still seen. In annealed samplesit is found that the orientations of the new grains
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.707.pdf
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