Non-dendritic structural 7075 aluminum alloy by liquidus cast and its semi-solid compression behavior

来源期刊：中国有色金属学报(英文版)2000年第2期

论文作者：刘丹 崔建忠 夏克农

文章页码：192 - 195

Key words：aluminum alloys; liquidus cast; semi-solid processing; compression

Abstract: 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 semisolid is remarkably lower than that of conventional dendritic structure. The formability of non-dendritic structure is better than that of dendritic structure.