ISSN:
1662-9752
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
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
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.519-521.1139.pdf