Thixoextrusion of A357 aluminium alloy
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Data publicació2010-09
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Abstract
The aim of this work is to attempt the application of A357 Al-Si-Mg cast alloy in the thixoextrusion process, evaluating the
different forming parameters effect. Thixoextrusion offers several advantages compared with traditional hot-extrusion such as lower
pressure, minor friction forces, higher material fluidity and longer tool life. This type of semi-solid process requires high solid
fraction (0.7<fs<1) materials because of its low solidification rate. Aluminium alloy A357 is a commercial cast alloy characterized by
high strength, ductility and corrosion resistance. It is commonly used for cast production of automotive components and it is also
suitable for semi-solid process, due to its wide range of solidification. A357 aluminium alloy was used as a feedstock for
thixoextrusion in order to investigate thixoformability at high solid fraction. A357 alloy with high solid fraction (>0.85) is less
sensitive to temperature drops and allows more stable material flow at higher speeds. To know the forming parameters that improve
the mechanical properties of thixoextruded parts, some extrusion tests were carried out. The results were used as the main criteria for
assessing the thixoforming viability of the A357 alloy.
CitacióForn, A. [et al.]. Thixoextrusion of A357 aluminium alloy. "Transactions of Nonferrous Metas Society of China", Setembre 2010, vol. 20, núm. 3, p. 1005-1009.
ISSN1003-6326
Versió de l'editorhttp://linkinghub.elsevier.com/retrieve/pii/S1003632610606218
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