Development of Aluminum-Lithium Alloys Processed by the Rheo Container Process

Roger Sauermann; Bernd Friedrich; T. Grimmig; M. Buenck; Andreas Bührig-Polaczek

doi:10.4028/www.scientific.net/SSP.116-117.513

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HomeSolid State PhenomenaSolid State Phenomena Vols. 116-117Development of Aluminum-Lithium Alloys Processed...

Development of Aluminum-Lithium Alloys Processed by the Rheo Container Process

Abstract:

This investigation describes the development and evaluation of thixoformable alloys on Al-Li-Mg basis in the scope of the collaborative research center SFB 289 at RWTH Aachen University. Scandium and zirconium was added to Al-Li2.1-Mg5.5 (A1420) with the aid of DoE (Design of Experiments) and precursor billets were manufactured by pressure induction melting (PIM). To evaluate the thixoformability of the synthesized alloys high-quality semi solid processed demonstrators were manufactured by the Rheo-Container-Process. Subsequent heat treatment raised the mechanical properties to maximum values of tensile strength of 432MPa, yield strength of 220MPa and an elongation of 13%. The RCP-Process was designed for the special requirements of this high reactive alloy. The paper will present extraordinary benefits in terms of properties and process simpleness for the semi-solid processing of Al-Li alloys.

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Periodical:

Solid State Phenomena (Volumes 116-117)

Pages:

513-517

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.116-117.513

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Online since:

October 2006

Authors:

Roger Sauermann, Bernd Friedrich, T. Grimmig, M. Buenck, Andreas Bührig-Polaczek

Keywords:

Alloy Development, Aluminum Lithium, Rheo-Casting, Rheo-Container-Process

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