Abstract
The effects of the viscosity, gate speed, and gate geometry on the flow behaviors of Al alloys in molten and semi-solid states were studied by direct observations of the flow patterns during die filling. Two different fluids, thixotropic fluid (semi-solid Al alloy) and Newtonian fluid (molten Al alloy), were chosen as the model fluids for monitoring the differences in flow patterns during die filling. High-speed photography was employed to record the real time flow patterns. Qualitative assessments on the critical gate speed were made based on the experimental results. The experimental results were also compared with results predicted based on the Reynolds number. Although the critical gate speed varies depending on the gate geometry, it is less than ∼2.5 m/sec in semi-solid forming, while it ranges from 0.3-0.5 m/sec in squeeze casting.
| Original language | English |
|---|---|
| Pages (from-to) | 351-357 |
| Number of pages | 7 |
| Journal | Metals and Materials International |
| Volume | 9 |
| Issue number | 4 |
| Publication status | Published - 2003 Aug 1 |
| Externally published | Yes |
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Keywords
- Aluminum
- Laminar
- Semi-solid forming
- Squeeze casting
- Turbulence
ASJC Scopus subject areas
- Engineering(all)
Cite this
Effect of the Gate Geometry and the Injection Speed on the Flow Behaviors of a Semi-Solid A356 Al Alloy. / Lee, Jae-chul; Seok, Hyun Kwang; Lee, Ho In.
In: Metals and Materials International, Vol. 9, No. 4, 01.08.2003, p. 351-357.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of the Gate Geometry and the Injection Speed on the Flow Behaviors of a Semi-Solid A356 Al Alloy
AU - Lee, Jae-chul
AU - Seok, Hyun Kwang
AU - Lee, Ho In
PY - 2003/8/1
Y1 - 2003/8/1
N2 - The effects of the viscosity, gate speed, and gate geometry on the flow behaviors of Al alloys in molten and semi-solid states were studied by direct observations of the flow patterns during die filling. Two different fluids, thixotropic fluid (semi-solid Al alloy) and Newtonian fluid (molten Al alloy), were chosen as the model fluids for monitoring the differences in flow patterns during die filling. High-speed photography was employed to record the real time flow patterns. Qualitative assessments on the critical gate speed were made based on the experimental results. The experimental results were also compared with results predicted based on the Reynolds number. Although the critical gate speed varies depending on the gate geometry, it is less than ∼2.5 m/sec in semi-solid forming, while it ranges from 0.3-0.5 m/sec in squeeze casting.
AB - The effects of the viscosity, gate speed, and gate geometry on the flow behaviors of Al alloys in molten and semi-solid states were studied by direct observations of the flow patterns during die filling. Two different fluids, thixotropic fluid (semi-solid Al alloy) and Newtonian fluid (molten Al alloy), were chosen as the model fluids for monitoring the differences in flow patterns during die filling. High-speed photography was employed to record the real time flow patterns. Qualitative assessments on the critical gate speed were made based on the experimental results. The experimental results were also compared with results predicted based on the Reynolds number. Although the critical gate speed varies depending on the gate geometry, it is less than ∼2.5 m/sec in semi-solid forming, while it ranges from 0.3-0.5 m/sec in squeeze casting.
KW - Aluminum
KW - Laminar
KW - Semi-solid forming
KW - Squeeze casting
KW - Turbulence
UR - http://www.scopus.com/inward/record.url?scp=1842576843&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=1842576843&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:1842576843
VL - 9
SP - 351
EP - 357
JO - Metals and Materials International
JF - Metals and Materials International
SN - 1598-9623
IS - 4
ER -