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  • 1
    Electronic Resource
    Electronic Resource
    Effect of Vertical Electromagnetic Stirring on the Grain Refinement of A356 Aluminum Alloy Inoculated by Al-5Ti-B (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 116-117 (Oct. 2006), p. 344-349 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: In this paper, the influence of electromagnetic stirring on the grain size of A356 alloyinoculated by Al-5Ti-B was investigated. It is found that when stirring is applied at the same timewith Al-5Ti-B, the inoculation effect will be disabled. X-ray determination and SEM observationshow that stirring hinders the deposition of TiB2 particles; consequently hinder the formation ofTiAl3 particles, which were proved to be the nucleus of primary α aluminum phase.If the stirring time is short, the grain size will be abnormally coarse. This experiment also confirmsthat the grain refinement of rheocasting is caused by dendrite fracture instead of modifiednucleation
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/22/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.116-117.344.pdf
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Forging Process of Wrought Aluminum Alloy with Controlled Solid Fraction by Electromagnetic Stirring (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 141-143 (July 2008), p. 277-282 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: This study demonstrates the indirect rheoforging of wrought aluminum alloys fabricatedby electromagnetic stirring (EMS). EMS was carried out by varying pouring temperature oftheological material and subsequently the rheo-material was forged into the sample which consistedof the direct and indirect forging part, by varying the applied forging pressure. The rheo-materialcompletely filled the die cavity at the applied forging pressure of 150 MPa. To transfer thedensification pressure to the end of the part, the applied forging pressure of over 170 MPa wasnecessary. To control liquid segregation, solid and liquid phases distribute uniformly by derivingthe laminar flow. When liquid segregation occurred significantly during rheoforging, the strengthrevealed as low as 268 MPa. Investigating relationship between microstructural features andmechanical properties of the product, the rheoforged material through EMS revealed the fine andglobular microstructure. Microstructure with uniform distribution of solid and liquid phase (nosegregation) showed good mechanical property of the rheoforged material whose tensile strengthwas 341 MPa for Al6061
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.277.pdf
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Computer Aided Simulation of the Rheology Forging Process for Aluminum Alloys and its Experimental Investigation (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 340-341 (June 2007), p. 611-618 
    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: Rheology forming is a novel processing method of semi-solid processing, which isdifferent from traditional mold forging and conventional casting process. The rheological behavior ofmetallic alloys containing both solid and liquid phases was investigated with the low and high solidfraction ranges. Its obvious advantages are easier to produce complex work pieces because ofexcellent forming ability, more flexible to shape, and more compact in the inner quality for its highpressure. This research paper presents the theory of the rheology forming process and the results of thefinite element simulation of rheology forming for aluminum alloys. In this proposed theoreticalmodels for the rheology forming process involve simultaneous calculations performed with solidphase deformation and the liquid phase flow analysis. To analyze the rheology process, the new flowstress curves of rheology aluminum alloys and the viscosity for the simulation of two-phase flowphenomena have been proposed with as a function of temperature
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.340-341.611.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    A Tissue Engineering Based Approach to Regeneration of Intervertebral Disc (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 342-343 (July 2007), p. 397-400 
    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: Thermosensitive scaffold was suggested for the partial replacement of nucleus indegenerated intervertebral disc with a minimally invasive surgical procedure. Biocompatible andthermosensitive scaffolds were prepared by coupling reaction of Pluronic with chitosan and it wasinserted in degenerative spinal motion segments. To confirm the regeneration of degenerative discsand subsequent structural stability, cell proliferation and morphological changes were evaluatedusing relaxation time, quantity of DNA and histological examination. As a result, inserted groupshowed higher relaxation time, reduced the decrement of DNA contents, and accumulated GAGamount. The results confirmed the potential of thermosensitive scaffolds and minimally invasivesurgical procedure for the regeneration of degenerative discs
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.342-343.397.pdf
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    Paper (German National Licenses)
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