Rheo-Extrusion of Hypereutectic Al-14.8Si-4.5Cu-1.1Mg Alloy
| Periodical | Advanced Materials Research (Volume 409) |
|---|---|
| Main Theme | THERMEC 2011 Supplement |
| Edited by | T. Chandra, M. Ionescu and D. Mantovani |
| Pages | 57-62 |
| DOI | 10.4028/www.scientific.net/AMR.409.57 |
| Citation | Nanako Mori et al., 2011, Advanced Materials Research, 409, 57 |
| Online since | November, 2011 |
| Authors | Nanako Mori, Yasuhiro Uetani, Masayoshi Dohi, Kenji Matsuda, Susumu Ikeno |
| Keywords | Age-Hardening, Hypereutectic Al-Si-Cu-Mg Alloy, Rheo-Extrudability, Rheo-Extrusion, Semi-Solid Extrusion, Semi-Solid Slurry, Tensile Properties |
| Price | US$ 28,- |
Rheo-extrusion of hypereutectic Al-14.8%Si-4.5%Cu-1.1%Mg (in mass%) alloy which is considerably difficult to hot-extrude was tried using semi-solid slurry with fine solid granules and almost finely dispersed primary Si particles, made by a newly developed rotor process. Trials of rheo-extrusion at the constant extrusion ratio of 36 using this semi-solid slurry were carried out at the different conditions of the extrusion temperature and the ram speeds ranging from 520 to 560oC and from 5 to 20mm/s, respectively. Under the all rheo-extrusion conditions, this semi-solid slurry could easily be rheo-extruded to the round bars of 6mm diameter with sound surface at much lower extrusion force than that of hot-extrusion at very low extrusion ratio. In addition, the characteristic age-hardening behavior which is thought to be essential for the rheo-extrusion process has been found out, namely the peak hardness values of aged bars rheo-extruded at 520 and 540oC were considerably higher, 30HV at maximum, than that of a gravity casting.
