Control of Amount of α-Al Phase Particles in near Eutectic Al-Si Alloy by Electromagnetic Stirring

Murakami, Yūichiro; Omura, Naoki

doi:10.4028/www.scientific.net/ssp.327.250

Cited by 5 publications

(2 citation statements)

References 19 publications

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“…Removed by ECS the yield of primary crystals achieved using the conventional method was only ³10%. 17) The silicon concentration in the obtained primary crystals was ³1.5%, and recycled ingots produced from the obtained solid phase could be used as a component of A6000 series alloys for wrought materials.…”

Section: Plasticsmentioning

confidence: 98%

Role and Potential of Aluminium and Its Alloys for a Zero-Carbon Society

Kumai

2023

Mater. Trans.

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The environmental impact of aluminium can be greatly reduced through recycling. However, recycled aluminium ingots are currently used for the fabrication of lower-grade materials (i.e., cascade recycling) and cannot be used for the production of high-purity and high-grade wrought materials, for which demand is expected to increase in the future. Researching and developing upgrade recycling methods for aluminium is therefore urgently needed, where recycled ingots with a lower environmental impact are used for the fabrication of wrought materials. This approach will substantially reduce greenhouse gas (GHG) emissions and ultimately promote a sophisticated resource-recycling society in which aluminium resources can be almost completely recycled.

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Section: Plasticsmentioning

confidence: 98%

Role and Potential of Aluminium and Its Alloys for a Zero-Carbon Society

Kumai

2023

Mater. Trans.

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“…In other words, SSM processing is not only temperature dependent, but also time-dependent. It is also demonstrated by Al-Si eutectic alloy to form semi-solid slurry for rheocasting because the thermal arrest during solidification, induces the decoupled crystal growth between silicon and aluminium under convection [220,224].…”

Section: Microstructural Evolution Of Binary Eutectic Alloy Under For...mentioning

confidence: 99%

An Overview on the Process Development and the Formation of Non-Dendritic Microstructure in Semi-Solid Processing of Metallic Materials

Wang

Dong

2022

Crystals

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Semi-solid metal (SSM) processing has been an attractive method for manufacturing near-net-shape components with high integrity due to its distinct advantages over conventional forming technologies. SSM processing employs a mixture of solid phase and liquid metal slurries and/or non-dendritic feedstocks as starting materials for shaping. Since the original development from 1970s, a number of SSM processes have been developed for shaping components using the unique rheological and/or thixotropic properties of metal alloys in the semi-solid state, in which the globular solid particles of primary phase are dispersed into a liquid matrix. In this paper, the progress of the development of shaping technologies and the formation of non-dendritic microstructure in association with the scientific understanding of microstructural evolution of non-dendritic phase are reviewed, in which the emphasis includes the new development in rheomoulding, rheo-mixing, rheo/thixo-extrusion and semi-solid twin roll casting, on the top of traditional rheocasting, thixoforming and thixomoulding. The advanced microstructural control technologies and processing methods for different alloys are also compared. The mechanisms to form non-dendritic microstructures are summarised from the traditional understanding of mechanical shear/bending and dendrite multiplication to the spheroidal growth of primary phase under intensively forced convection. In particular, the formation of spheroidal multiple phases in eutectic alloys is summarised and discussed. The concluding remarks focus on the current challenges and developing trends of semi-solid processing.

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