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  • 1
    Electronic Resource
    Electronic Resource
    Basic Study on Thixo-Co-Extrusion of Multi-Layer Tube with Al/Mg Alloys (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 141-143 (July 2008), p. 73-78 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: Thixo-forming is in the forefront of metal processing technology in the 21st century. Theresearch on thixo-co-extrusion of multi-layer tube as extension and development of the semi-solidforming technology is a completely new processing method for the composite material forming andis of great significance, in which different semi-solid billets (slurries) are extruded at the same timeto form multi-layer tubes. In this study, different sizes of column-shaped and ring-shaped billets ofAl/Mg alloys were firstly prepared by using specially designed molds. Then they were reheated byelectric-resistance furnace，microstructures from different heating laws were investigated. Lastly,FEM simulation on thixo-co-extrusion of double-layer tube with A356/AZ91 was conducted
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.73.pdf
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Study on Semi-Solid Magnesium Alloy Fabricated by Ultrasonic Stirring Method (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 47-50 (June 2008), p. 347-350 
    Details
    ISSN: 1662-8985
    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 perfect semi-solid magnesium alloy had been prepared using ultrasonic stirringmethod. The effect of technological parameters such as melt temperature, ultrasonic power andultrasonic treatment time on the microstructure of semi-solid AZ61 alloy had been investigated. Theresults showed that the better refined and well-distributed globular semi-solid magnesium alloy hadbeen acquired with the increasing of output power of ultrasonic stirring when melt temperature andultrasonic treatment time were at a certain range
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.47-50.347.pdf
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    High Temperature Mechanical Behavior of 16Mnq under Constant Constraint Conditions (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 575-578 (Apr. 2008), p. 947-952 
    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: Welding is a main processing way in the manufacture of steel bridges. Weldingdeformation is one of the main influencing factors on the quality of steel bridges, which relates to theeffect of material mechanical behavior and welding techniques. The welding distortion is consideredto be a result from the inherent strain after welding, which dependent on the highest temperaturereached and the constraint at each point. 16Mnq is a common structural steel used in railway steelbridges. Thus, the paper addresses the high-temperature mechanical behavior of 16Mnq through aseries of experiments under various peak temperatures and constant constraint conditions.Relationships between temperature, constraint and strain at high temperatures were discussed. Theyielding phenomenon based on high temperature occurs under a certain condition of both constraintand temperature, and this phenomenon had significant influence on the inherent strain. The results aresignificant to understand thermal-mechanical behavior of material and to predict the inherent strainunder constant constraint conditions during heat circulates of welding
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.575-578.947.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    The variational principle of structural analysis for damage-coupled elastoplastic creep problem (1992)
    Springer
    Acta mechanica solida Sinica 5 (1992), S. 125-133 
    Details
    ISSN: 0894-9166
    Keywords: effective stress ; elastoplasticity ; creep damage ; parametric variation principle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Based on the concept of the effective stress in continuum damage mechanics, this paper studies the damage-coupled problem in elastoplastic creep. By using the parametric variational principle developed from optimal control theory, a numerical principle for the problem discussed has been established, the proof for which is also given. It is found that the principle proposed has a normalized form and can easily be put into application by computer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02207876
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    The numerical variational principle of structural analysis for elastoplastic creep damage problems (1991)
    Springer
    International journal of fracture 50 (1991), S. R9 
    Details
    ISSN: 1573-2673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00035172
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    Paper (German National Licenses)
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