Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1601893 | Intermetallics | 2007 | 7 Pages |
Abstract
The castability of titanium aluminide (TiAl) turbo-charger was investigated with various casting parameters. The fluidity of TiAl alloys increased with mold preheating temperature and centrifugal force. The thermo-physical variables estimated by casting process were applied to the modeling of TiAl turbo-charger casting using the Magmasoft®. In the case of real casting process, there were many misruns and cold-shuts due to low fluidity of molten TiAl alloy. However, in the modeling, molten TiAl alloys never stop even though the turbo-charger has both the curvature and thin wall parts. Therefore, there were no major defects such as misruns and cold-shuts in the modeling process. The gap between casting and modeling remains in TiAl alloy turbo-charger casting since the modeling process cannot explain the microstructural evolution during solidification and metal-mold reaction between mold materials and TiAl alloy.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Si-Young Sung, Young-Jig Kim,