Abstract
The effect of strontium on porosity formation in aluminum-silicon alloys is not well understood and there is no consensus upon the cause of the effects observed. This paper describes a series of experiments where the effect of adding strontium on pore formation was observed directly with combination of a traditional temperature gradient stage and real time micro-focus radiography. These in situ observations provide a new insight into the effect of strontium on the nucleation and growth kinetics of porosity. The addition of strontium was found to have a minor effect on the growth of the pores in the mushy zone. However, strontium appeared to alter the nucleation and stability of hydrogen bubbles within the melt. The interaction of strontium with titanium-boride grain refiners produced an even stronger change in the nucleation and stability of the bubbles formed.
Original language | English (US) |
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Pages | 555-565 |
Number of pages | 11 |
State | Published - 2002 |
Externally published | Yes |
Event | EPD Congress 2002 on Fundamentals of Advanced Materials for Energy Conversion - Seattle, WA, United States Duration: Feb 17 2002 → Feb 21 2002 |
Conference
Conference | EPD Congress 2002 on Fundamentals of Advanced Materials for Energy Conversion |
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Country/Territory | United States |
City | Seattle, WA |
Period | 2/17/02 → 2/21/02 |
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys