Co-extrusion of Discontinuously, Non-centric Steel-reinforced Aluminum
- Institute of Forming Technology and Lightweight Construction (IUL), Technische Universitaet Dortmund, Baroperstrasse 301, 44227 Dortmund (Germany)
The process of manufacturing discontinuously non-centric steel reinforced aluminum by means of co-extrusion has been examined. By this process semi-finished reinforced profiles can be fabricated for further treatment through forging techniques. Therefore, steel reinforcement elements consisting of E295GC were inserted into conventional aluminum billets and co-extruded into two different solid profiles; a rectangle one by an extrusion ratio of 10.1:1 and a round one by 4.8:1. The used aluminum alloy is EN AW-6060. The billet temperature as well as the ram speed were varied to investigate their influence on the position of the reinforcement elements inside the strand. The measurement was done by a video measurement system, called Optomess A250, after milling off the strand. The distances between the elements in longitudinal direction were nearly constant, apart from the rear part of the strand. The same was observed for the distance of the steel elements to the profile edge. This due to the inhomogeneous material flow in the transverse weld, related to the billet-to-billet extrusion. The rotation of the reinforcement elements occurs because the elements flow nearby the shear zone. Further, micrographs were made to investigate the embedding situation and the grain size distribution. The embedding of the reinforcement elements were good in the solid round profile, but in the rectangle profile were found some kind of air pocket. The grain size of the aluminum alloy close to the steel elements is much smaller than in the other parts of the solid round profile.
- OSTI ID:
- 21516758
- Journal Information:
- AIP Conference Proceedings, Vol. 1353, Issue 1; Conference: ESAFORM 2011: 14. international ESAFORM conference on material forming, Belfast, Northern Ireland (United Kingdom), 27-29 Apr 2011; Other Information: DOI: 10.1063/1.3589555; (c) 2011 American Institute of Physics; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALUMINIUM
ALUMINIUM ALLOYS
DISTRIBUTION
EXTRUSION
FORGING
GRAIN SIZE
MANUFACTURING
MATERIALS
MILLING
ROTATION
SOLIDS
STEELS
VELOCITY
WELDED JOINTS
ALLOYS
CARBON ADDITIONS
ELEMENTS
FABRICATION
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
MACHINING
MATERIALS WORKING
METALS
MICROSTRUCTURE
MOTION
SIZE
TRANSITION ELEMENT ALLOYS