Effect of superheat on melting rate of EEM of Al alloys during stirring using the RheoMetal process
2013 (English)In: Solid State Phenomena, ISSN 1012-0394, E-ISSN 1662-9779, Vol. 192-193, 392-397 p.Article in journal (Refereed) Published
The RheoMetal process (previously called the Rapid S- and RSF- process) is a novelmethod to produce cost effective, high quality, semisolid slurries for component casting. TheRheoMetal process uses an Enthalpy Exchange Material (EEM) as cooling agent to absorb heat andproduce a slurry. Critical process parameters to create a slurry by robust melting of the EEM arealloy content, stirring speed, EEM to melt ratio, EEM temperature, EEM microstructuralcharacteristics and melt superheat.In this paper, the melting sequence and melting rate of the EEM was studied experimentally. Theeffect of EEM composition, as well as superheat, on evolution of shape and dimension of the EEMduring stirring was investigated. Initial material freezing onto the EEM was observed, followed by astationary phase with subsequent gradual melting of the EEM. It was shown that the characteristicsof freeze-on layer were strongly correlated to melt superheat, EEM temperature, as well as materialcomposition, hence also has significant influence on the melting sequence.
Place, publisher, year, edition, pages
2013. Vol. 192-193, 392-397 p.
Semi-Solid casting, melting, non-dendritic slurry, RheoMetal Process, Experimental Design, Rapid S, RSF
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:hj:diva-19514DOI: 10.4028/www.scientific.net/SSP.192-193.392ISI: 000315930600060ScopusID: 2-s2.0-84870797417OAI: oai:DiVA.org:hj-19514DiVA: diva2:556338