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  • 2005-2009  (2)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Modelling the Precipitation of Al〈sub〉3〈/sub〉X Dispersoids in Aluminium Alloys and their Effect on Recrystallization (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 550 (July 2007), p. 45-54 
    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: A combined model is presented that predicts the non-uniform distribution of Al3Xdispersoid particles in commercial aluminium alloys containing zirconium and scandium and usesthese predictions as inputs to a simple recrystallization model. The recrystallization model relies onknowledge of the stored energy in the sub-structure after deformation and this has been measuredusing electron backscattered diffraction (EBSD) techniques. The recrystallization model is based onthe concept that partial recrystallization results from the non-uniform distribution of dispersoidparticles due to their precipitation from a segregated cast structure. The model has been used todevise an improved homogenization treatment for AA7050, which uses an isothermal hold duringheat up to maximize dispersoid nucleation. It has also been applied to predict the effect of scandiumadditions on recrystallization, investigate the factors that control the through thickness variation inrecrystallized fraction, and interpret the results of experiments where the effect of strain rate havebeen studied
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.550.45.pdf
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Laser and Hybrid Laser-MIG Welding of 6.35 and 12.7mm Thick Aluminium Aerospace Alloy (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 519-521 (July 2006), p. 1139-1144 
    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: Fusion welding of 7xxx aluminium alloy plates has been investigated for aerospaceapplications using autogenous laser welding and hybrid laser-MIG welding. Nd:YAG and Yb-fibrelasers have been used, with two different focussed spot sizes in each case. Autogenous and hybridwelding of 12.7mm thick plate using the Yb-fibre laser with a 0.6mm diameter spot was selected forfurther development, on the basis of penetration and weld quality achieved. These welds wereacceptable to the highest quality class B (stringent) of BS EN ISO 13919-2:2001, with a porosity ofonly 0.3% of the cross-sectional area of the weld, and close to class A of AWS D17.1. Transverseproof strengths of ~60% of parent material were achieved. Development of hybrid welding isongoing with novel fillers to refine weld metal grain structure and improve weld properties
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.519-521.1139.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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