摘要
The experimental and analytical approaches were taken to investigate the non-dendritic microstructure formation and evolution of AlSi9Cu3 alloy during rheocasting.The results show that the globular primary α(Al) particles free of entrapped eutectic form after rheocasting for 3 s,and could be morphologically stabilized during subsequent growth.The fine and globular particles underwent a coarsening process under quiescently continuous cooling in which the particle density decreases,the solid fraction increases,the average particle size increases with the increase of solidification time at a rate that closely followed the classical Ostwald ripening.
The experimental and analytical approaches were taken to investigate the non-dendritic microstructure formation and evolution of AlSi9Cu3 alloy during rheocasting.The results show that the globular primary α(Al) particles free of entrapped eutectic form after rheocasting for 3 s,and could be morphologically stabilized during subsequent growth.The fine and globular particles underwent a coarsening process under quiescently continuous cooling in which the particle density decreases,the solid fraction increases,the average particle size increases with the increase of solidification time at a rate that closely followed the classical Ostwald ripening.
出处
《中国有色金属学会会刊：英文版》
CSCD
2010年第S3期815-820,共6页
Transactions of Nonferrous Metals Society of China
基金
Project(50804023) supported by National Natural Science Foundation of China
Project(205084) supported by Ministry of Education Focused on Scientific and Technological Research
