| 1. |
- Jarfors, Anders E.W. 1963-, et al.
(författare)
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Semisolid Materials Processing : A Sustainability Perspective
- 2022
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Ingår i: Solid State Phenomena. - : Trans Tech Publications. - 9783035717792 - 3035717796 ; , s. 287-292
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Konferensbidrag (refereegranskat)abstract
- Sustainable development is increasing in importance with restrictions on emission and carbon footprint. Similarly, both energy and resources efficiency is required, together with cost-efficiency. The current paper focuses on carbon footprint, energy usage, and material use efficiency of semisolid metal casting. A detailed analysis is made on the RheoMetal process, which is benchmarked against conventional HPDC casting. The analysis includes the gating system and the importance of the use of primary or secondary material. It furthermore includes a discussion of process yield and benefits based on process capability.
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| 2. |
- Zhang, Qing, et al.
(författare)
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Role of Iron-Rich Phases and Porosity on the Ductility of Rheocast Al-Mg-Si-Alloys
- 2022
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Ingår i: 16th International Conference on Semi-Solid Processing of Alloys and Composites, S2P 2021. - : Trans Tech Publications Ltd. ; , s. 65-70, s. 65-70
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Konferensbidrag (refereegranskat)abstract
- Treatment of the slurry is important during RheoMetalTM casting. In this work, semi-solid slurries were prepared under different stirring intensities, using two types of stirrers: a naked rod (for regular stirring) and a rod with two blades (for intensive stirring). Tensile tests were performed, investigating fracture surfaces, as well as metallographic samples. The results show that intensive stirring produces castings with finer primary particles and a more homogeneous microstructure. On the other hand, more faceted Fe-rich phases are found along the α-Al grains boundary, due to the dissolution of Fe from the stirrers. Moreover, for intensive stirring castings, the porosity found on the fracture surfaces are smaller, while more second (intermetallic) phases, especially Fe-rich phases, are observed. Consequently, the castings with intensive stirring show worse ductility. Finally, a quantitative analysis was made regarding ductility, affected both by porosity and the presence of Fe-rich phases.
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