Feeding and Pore Formation in Semisolid Metal Casting

Anders E. W. Jarfors; Qing Zhang; and Stefan Jonsson

doi:10.20944/preprints202010.0070.v1

Preprint Communication Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 2 October 2020 / Approved: 5 October 2020 / Online: 5 October 2020 (11:03:50 CEST)

Semisolid casting can provide excellent castings, but the nature of the pore-forming mechanisms has not been properly clarified. In the current communication, it was suggested that hydrogen precipitated during slurry making might have a decisive role in the formation of both gas and shrinkage porosity. Intensive stirring at the end of the slurry making process may act as a degassing step. Without the intense stirring, structures of primary slurry particles form around the hydrogen pores, strongly affecting pore formation and feeding during the intensification stage.

Semisolid casting; porosity, hydrogen, shrinkage, feeding; stirring; degassing

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Feeding and Pore Formation in Semisolid Metal Casting

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