Abstract
The fatigue resistance of an Al-Si casting alloy (A356) solidified under pressures up to 20 atm and under a vacuum was investigated. Pressures of 10 and 20 atm mitigated microporosity in plate-castings, and this enhancement significantly improved fatigue resistance. Cooling rate during solidification, which affects the dendrite arm spacing (DAS), was also varied. Also studied were Sr-modification and the use of a flux to capture oxide-bifilms. Fatigue life increased as the maximum pore size decreased, which resulted from the over-pressures and/or a decrease in DAS. The use of flux in the mold and Sr-modification, especially when employed simultaneously, also increased fatigue life.
| Original language | English (US) |
|---|---|
| Pages | 275-282 |
| Number of pages | 8 |
| State | Published - 2007 |
| Event | SHAPE CASTING: 2nd International Symposium - Orlando, FL, United States Duration: Feb 25 2007 → Mar 1 2007 |
Other
| Other | SHAPE CASTING: 2nd International Symposium |
|---|---|
| Country/Territory | United States |
| City | Orlando, FL |
| Period | 2/25/07 → 3/1/07 |
Keywords
- Aluminum casting alloy
- Fatigue
- Microporosity
- Pressure casting
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys