Jayaraj, J Fleury, E Kim, KB Lee, JC 2024-01-21T05:01:51Z 2024-01-21T05:01:51Z 2021-09-03 2005-06 1598-9623 https://pubs.kist.re.kr/handle/201004/136433 Semisolid slurries of Al-15Cu alloy were produced for rheoforming by a low temperature pouring technique. To investigate the morphological change of the slurry in terms of the particle mean diameter and the roundness factor, samples were extracted during the continuous cooling and the isothermal holding stage of the slurry by a simple technique of interrupt quenching. Results demonstrated that the fine-grained equiaxed dendritic structure, which formed during low temperature pouring, is changed to a globular structure when held at a semisolid temperature for sufficiently long holding time. With regard to the globulization mechanism of the primary alpha-phase, local melting is considered to take place at the neck of equiaxed dendrites, leading to the separation of small new particles during continuous cooling. These newly formed particles eventually grow during isothermal holding in the semisolid temperature by obeying the D-3 = Kt kinetic law, which suggests coarsening by Ostwald ripening. English KOREAN INST METALS MATERIALS BEHAVIOR Globulization mechanism of the primary Al of Al-15Cu alloy during slurry preparation for rheoforming Article 10.1007/BF03027451 1 METALS AND MATERIALS INTERNATIONAL, v.11, no.3, pp.257 - 262 METALS AND MATERIALS INTERNATIONAL 11 3 257 262 scie scopus kci ART000962443 000230266100012 Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science Metallurgy & Metallurgical Engineering Article BEHAVIOR semisolid rheoforming microstructural evolution local melting coalescence Ostwald ripening