Hot Tearing Susceptibility and Fluidity of Semi-Solid Gravity Cast Al-Cu Alloy |
| Journal |
Solid State Phenomena (Volumes 116 - 117) |
| Volume |
Semi-Solid Processing of Alloys and Composites |
| Edited by |
C.G. Kang, S.K. Kim and S.Y. Lee |
| Pages |
76-79 |
| DOI |
10.4028/www.scientific.net/SSP.116-117.76 |
| Online since |
October, 2006 |
| Authors |
J. Wannasin,
David Schwam,
J.A. Yurko,
C. Rohloff,
G. Woycik
|
| Keywords |
Aluminium-Copper Alloy, Casting, Fluidity, Hot Tearing, Semi-Solid Metal |
| Abstract |
Aluminum-copper alloys offer both high strength and excellent ductility suitable for a
number of automotive applications to reduce vehicle weight; however, the alloys are difficult to cast
because of their tendency for hot tearing. In this work, semi-solid gravity casting of an
aluminum-copper alloy, B206, was conducted in constrained rod casting molds to study the feasibility
of using the process to reduce or eliminate hot tearing. To demonstrate the feasibility of gravity
casting of the metal slurries, a fluidity test was also conducted. Results show that the hot tearing
susceptibility of the aluminum-copper B206 alloy cast in semi-solid state is lower than those cast in
liquid state with high superheat temperatures. The grain size of the semi-solid cast Al-Cu samples
appears to be finer than those cast in liquid state with high superheat temperatures. In addition, the
metal slurries had sufficient fluidity to fill the molds even with low gravity pressures. The results
suggest that semi-solid gravity casting is a feasible process to help reduce hot tearing. |
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