Fabrication of Semisolid Billets of Hypereutectic Al-Si Alloy by Severe Plastic Deformation and Remelting

Hai Xia Shi; De Hong Lu; Hui Gong; Rong Zhou

doi:10.4028/www.scientific.net/AMR.472-475.323

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 472-475Fabrication of Semisolid Billets of Hypereutectic...

Fabrication of Semisolid Billets of Hypereutectic Al-Si Alloy by Severe Plastic Deformation and Remelting

Abstract:

This paper preliminarily explored and proved the feasibility of fabricating semisolid thixoforming billets for a hypereutectic Al-Si alloy (AlSi29Fe3) by severe plastic deformation (SPD) and semisolid remelting. In this paper, friction stir processing (FSP) was used to refine the coarse primary silicon particles and needle-shaped iron-rich phase of the hypereutectic Al-Si alloy. The results show that the semisolid thixoforming billets obtained by the above route contain fine spherical Al grains with mean size of 34m, and second-phase particles (both primary silicon and iron-rich intermetallic) of less than 10m. The microstructure is ideal non-dendritic semisolid structure. Therefore, SPD and remelting is a promising technology for the fabrication of semisolid thixoforming billets of the hypereutectic Al-Si alloy.

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Advanced Manufacturing Technology, ICMSE 2012

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Periodical:

Advanced Materials Research (Volumes 472-475)

Pages:

323-327

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.472-475.323

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Online since:

February 2012

Authors:

Hai Xia Shi, De Hong Lu, Hui Gong, Rong Zhou

Keywords:

Friction Stir Processing (FSP), Hypereutectic Al-Si Alloy, Semi-Solid Billet, Severe Plastic Deformation (SPD)

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References

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