ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Preparation of Titanium Microfiltration Membrane by Field–Flow Fractionation Deposition (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 534-536 (Jan. 2007), p. 985-988 
    Details
    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 primary aim pursued by the preparation of the separation membrane is to make themembrane thinner as well as have no defects. The field-flow fractionation deposition is a newmolding technology which can overcome the traditional disadvantages, such as multi-preparation, tothe preparation of a great area of the separation membrane with no defects. Therefore the mainingredients which influence the appearance and performance of titanium membrane layers areinvestigated by a scanning electricity mirror (SEM) as well as a porous material testing instrument:powder performance prepared and confected; selection of supporting body; sintering system such astemperature and time. It is shown that the membrane thickness can be controlled at 50μm or so
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.534-536.985.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Microstructure Evolution of AZ31 Magnesium Alloy during Warm Compression Forming (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 1813-1817 
    Details
    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: Warm compression tests of AZ31 Mg alloy were carried out at five temperatures in30°C intervals from 210°C to 330°C. The samples of different thickness which were machinedfrom as-cast and pre-strained AZ31 billets were compressed into thickness 1mm and then cooled inthe air to room temperature. The microstructural evolution of AZ31 Mg alloy was investigatedduring warm compression forming. The results show that all the samples have undergone amicrostructure changes to different scales in the range investigated. The twinning is thepredominant deformation mechanism for magnesium alloys at moderate temperatures and itsoccurrence is dependent on temperature and strain. Microstructural evaluation indicates that themean size of the recrystallised grains decreases with increasing effective strain and temperaturebecause of sufficient dynamic recrystallization. The original grain has significant influence onmicrostructural evolution during warm forming
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.1813.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Effects of Tool Radius on Formability during Forging of AZ80 Magnesium Alloy Wheel (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 1696-1700 
    Details
    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
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.1696.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Effects of High Gradient Magnetic Fields on Solidified Structures of Non-Magnetic Metals with Different Susceptibilities (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 546-549 (May 2007), p. 1003-1008 
    Details
    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: In the present study, the influencing factors such as the intensity and the direction ofgradient magnetic fields, the magnetic susceptibilities of non-magnetic metals on the structures arestudied theoretically and experimentally. In the theoretical analyses, the influences of high gradientmagnetic fields on nucleation and structures are investigated. In the experimental research, highgradient magnetic fields are imposed on paramagnetic material Al and diamagnetic one Sn duringtheir solidification processes. Then the macro- and microstructures of these samples are examinedand the influences of magnetic susceptibilities of metals, the intensity and the direction of highmagnetic fields are analyzed in details. It is found that solidified structures could be refined when themagnetization force and gravity were in the same directions, while the solidified structures could becoarsened and the coarse dendrites grew along the direction of the imposed magnetic fields when thedirections of these two forces were opposite. Those phenomena could be explained from the views ofreduced gravity and elevated gravity effects caused by magnetization force and the convectionsuppression effect caused by high magnetic fields. The results indicate that high magnetic fields canbe applied to control the solidified structures of metals and then improve the quality and theproperties of materials for different purposes
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.1003.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Control of the Alloying Element Distribution in Al-Alloys by High Magnetic Fields (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 457-462 
    Details
    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 distribution and solidified structure of alloying elements are important for thequality and the properties of alloys. In the present study, the solidification behavior ofaluminum-rich alloys is studied under various high magnetic field conditions, and theinfluences of uniform and gradient magnetic fields with different intensity and direction on thedistribution and the morphology of solute elements of Al-Cu and Al-Mg alloys are investigated.It is found that because of the differences of the electromagnetic force (Lorentz andmagnetization forces) acting on Cu element and Mg element with different physical propertiesin the matrix, the regularities of distribution for Cu element and Mg element are opposite just inthe intracrystalline and intergranular under high uniform magnetic field condition, and not onlythe content but the distributions of Cu and Mg elements are obviously different under highgradient magnetic field conditions as well. It can be concluded that high magnetic field hasdifferent effect on the solute distribution in alloys with different physical properties such asdensity, susceptibility, conductivity, etc. And the experimental results indicate that it is possibleto control the terminal solubility and morphology of the solute elements in alloys by highmagnetic fields
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.457.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Experimental Researches on Precision Grinding of KDP Crystal (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 359-360 (Nov. 2007), p. 113-117 
    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 KDP (Potassium Dihydrogen Phosphate) crystal, used as an important photoelectronpart in the laser nuclear fusion system, is a typical kind of hard-to-machine material because of itssoft, brittle, anisotropic property and nano-scale requirement for the shape and plane precision.Based on the experiments of the KDP crystal’s grindability, certain process parameters, such as thewheel granularity, the grinding depth and the workpiece’s feeding speed etc., and their influenceson the grinding force and the surface roughness of KDP workpiece are analyzed. Furthermore, someKDP crystal’s typical surface damages in grinding are analyzed and some technical approaches toincreasing the ultraprecision machining surface quality of KDP crystal are suggested as well
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.359-360.113.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Study on Self-Configuration Method of Neural Network Model for Grinding Troubles On-Line Monitoring (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 359-360 (Nov. 2007), p. 199-203 
    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 grinding trouble on-line monitoring mode is presented based on the nonlinear buildingmode principle of neural network. The input units were the peak of the FFT, the peak of RMS, andthe standard deviation of AE signals. The outputs were the troubles of the grinding burning,grinding chatter, and grinding wheel dull. The structure of neural network is established byself-configuration method. The network mode is trained and tested by using the experiment data,and the results indicate that the neural network mode obtained by self-configuration method hashigh recognize rate for grinding troubles, and can be used to monitor grinding troubles on-line
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.359-360.199.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Study on a Grinding Quality Assessing Method Based on Fuzzy Decision Combined with Analytic Hierarchy Process (AHP) (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 359-360 (Nov. 2007), p. 543-547 
    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 grinding quality assessing is a complex decision-making process, which mustoptimize and balance multi-influence factors. A grinding quality assessing method based on fuzzysynthetic evaluation theory combined with analytic hierarchy process (AHP) is presented in thispaper, and used to quality assessing for grinding process. The result of analyzing example indicatesthat this method can be used to estimate grinding quality based on the monitoring result of grindingprocess and grinding condition, and to assist grinding worker to select optimum grinding parametersfor the steady grinding quality
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.359-360.543.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    facet.materialart.
    Unknown
    Southern Ocean water mass formation in a finite-element coupled sea ice--ocean model (2007)
    In:  EPIC3IUGG XXIV General Assembly, Perugia, Italy, July 1-13, 2007 p.
    Details
    Publication Date: 2019-07-16
    Description: A finite-element coupled sea ice--ocean model (FESOM) has been developed at the Alfred Wegener Institute for Polar and Marine Research.The sea-ice component is a dynamic-thermodynamic model with an elastic-viscous-plastic rheology.The ocean component is the hydrostatic, primitive-equation Finite Element Ocean Model (FEOM).An eight-compartment model of the marine ecosystem, featuring nitrate and silicate cycles and considering possible iron limitation, has been implemented.The coupled model has been configured in a circumpolar domain covering the Southern Ocean between the coast of Antarctica and 48S, and on a global grid with $1.5^\circ$ mean resolution.Multi-decadal simulations have been performed in both configurations with a surface forcing derived from atmospheric reanalysis datasets.The model features a realistic representation of sea-ice coverage and large-scale ocean circulation.Results from a wide range of sensitivity studies confirm the crucial importance of a carefully chosen adaptive mixing scheme to parameterize vertical and horizontal mixing.Artificial passive tracers are used to identify water mass formation pathways.With the right choice of parameters and parameterizations, the model is able to reproduce observed water mass properties and formation processes realistically.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 10
    facet.materialart.
    Unknown
    Representing the ocean bottom topography with z, z-sigma and sigma vertical grids (2007)
    In:  EPIC3European Geosciences Union General Assembly, April 2007, Vienna, Austria..
    Details
    Publication Date: 2019-07-16
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...