Abstract
Abstract This paper presents a scientific contribution to the development of lightweight/high-performance Al –Li alloys suitable for semi-solid processing. Thermodynamic calculations identified the most promising compositions with focus on the solidus – liquidus interval, fraction of solid-versus-temperature and phase reactions. The synthesis of Al –Li precursor billets was performed by overpressure induction melting in controlled atmosphere. DTA and microstructure investigations on Al –Li specimens were carried out as well as thixocasting trials of demonstrator components. New rheocasting of Al –Li alloys was investigated to identify the potential of this alternative precursor material route. It is shown that specifically developed Al –Li alloys offer great potential for semi-solid manufacturing.
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