中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 10 No. 2 April 2000 |
liquidus cast and its semi-solid compression behavior①
（1. College of Materials and Metallurgy, Northeastern University, Shenyang110006, P.R.China;
2. Department of Mechanical and Manufacturing Engineering, Melbourne University, Australia）
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.
Key words: aluminum alloys; liquidus cast; semi-solid processing; compression
