Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8044529 | Vacuum | 2018 | 13 Pages |
Abstract
Cast and extruded Mg-5.15Y-3.75Gd-3.05Zn-0.75Zr alloys were selected as starting materials in a series of reheating experiments and thixo-compression tests. Homogenous spherical semisolid slurries were obtained when the reheating temperature and isothermal holding time were 560â¯Â°C and 20â¯s, respectively. However, the different grain sizes and different distributions of eutectic compounds in the starting materials resulted in different morphologies of the semisolid slurries. An innovative model was established to explain the dependency of the semisolid slurry on the morphology of starting material. The thixoforming properties of the semisolid slurry were affected by the forming temperature, strain rate, and its morphology. The dependency of thixoforming properties on the stain rate and morphology of semisolid slurry decreased at higher forming temperature. When the extruded alloy was formed at 560â¯Â°C with a strain rate of 0.1/s, a sample with a smooth surface was formed by a lower forming load.
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Yi Meng, Qian Li, Yao Tang, Sumio Sugiyama,