摘要
Fine, equiaxed, non dendritic structure needed by semi solid processing was obtained by liquidus cast, i.e. 7075 wrought aluminum alloy cast from liquidus temperature. The microstructures after heat treatment at different temperatures and time in the semi solid range were observed, and the compression deformation behavior at different temperatures (490～600 ℃) and strain rates (5×10 -3 ～5s -1 ) was investigated by means of Gleeble 1500 thermal mechanical simulator. The results show that the deformation resistance of the non dendritic structure attained by liquidus cast in semi solid is remarkably lower than that of conventional dendritic structure. The formability of non dendritic structure is better than that of dendritic structure.
Fine, equiaxed, non-dendritic structure needed by semi-solid processing was obtained by liquidus cast, i.e. 7075 wrought aluminum alloy cast from liquidus temperature. The microstructures after heat treatment at different temperatures and time in the semi-solid range were observed, and the compression deformation behavior at different temperatures (490 similar to 600 degrees C) and strain rates (5 x 10(-3) - 5s(-1)) was investigated by means of Gleeble-1500 thermal-mechanical simulator. The results show that the deformation resistance of the non-dendritic structure attained by liquidus cast in semi- solid is remarkably lower than that of conventional dendritic structure. The formability of non-dendritic structure is better than that of dendritic structure.
出处
《中国有色金属学会会刊：英文版》
CSCD
2000年第2期192-195,共4页
Transactions of Nonferrous Metals Society of China
基金
ScienceCommitteeofLiaoningProvince
