The extrusion of hollow profiles with a gas pocket behind the bridge Online publication date: Wed, 03-Nov-2010
by Henry Valberg, Thorbjoern Loeken, Morten Hval, Bard Nyhus, Christian Thaulow
International Journal of Materials and Product Technology (IJMPT), Vol. 10, No. 3/4/5/6, 1995
Abstract: Extrusion welding in porthole die extrusion of aluminium was investigated experimentally, using two different modular porthole extrusion dics. The die design allowed removal of the metal rests from the ports and the welding chamber of the die alter extrusion. The metal residue was then inspected to check whether the die cavities had been completely filled wilh metal during extrusion and to map to what extent these conditions influenced extrusion welding. The experiments aimed at extrusion conditions creating low pressure and partial filling of metal inside the welding chamber in order to investigate how these conditions of extrusion affect the quality of the extrusion seam. Extrusion conditions giving extrusion welds of insufficient strength and ductility were mapped in the experiments. The extrusion welds were tested with regard to mechanical properties in the direction transverse to the seam weld, both using tensile testing and fracture mechanics testing.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Materials and Product Technology (IJMPT):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook