| Autor: |
Möller, Hein, Govender, Gonasagren, Stumpf, Waldo |
| Zdroj: |
Diffusion and Defect Data Part B: Solid State Phenomena; July 2008, Vol. 141 Issue: 1 p737-742, 6p |
| Abstrakt: |
The heat treatment cycles that are currently applied to semi-solid processed components are mostly those that are in use for dendritic casting alloys. These heat treatments are not necessarily the optimum treatments for non-dendritic microstructures. For rheocast alloy A356, it is shown that natural aging prior to artificial aging causes the time-to-peak-hardness to be longer compared to the time when only artificial aging is used. Furthermore, a hardness plateau is maintained during artificial aging at 180oC between 1 and 5 hours without any prior natural aging. A natural aging period as short as 1 hour results in a hardness peak (rather than a plateau) to be reached during artificial aging after 4 hours at 180oC. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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