Abstract
Effects of ultrasonic vibration on solidification structure of Zn-55Al-1. 6Si alloy were investigated. The results show that solidification structure of the alloy is apparently changed after ultrasonic treatment. With increasing in ultrasonic power, primary a phase is converted from coarse dendrite into fine and round rosette one. However, when ultrasonic power exceeds 200 W, with increasing in power, refining effects can be ignored. At a given ultrasonic power, solidification structure is also related with ultrasonic temperature. When vibration-stop temperature is below liquidus temperature, primary o phase is transformed into isotropic rosette and near spherical structure. Furthermore, the lower the vibration-stop temperature is, the finer the structure is. Coarse dendritic α-Al phase is transformed into fine spherical one with ultrasonic power of approximately 200W at 540 - 620°G.
| Original language | English |
|---|---|
| Pages (from-to) | 285-287 |
| Number of pages | 3 |
| Journal | Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys |
| Volume | 31 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 2011 |
Keywords
- Solidification structure
- Ultrasonic vibration
- Vibration refinement
- Zn-Al alloy
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