ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
Aluminum-copper alloys offer both high strength and excellent ductility suitable for anumber of automotive applications to reduce vehicle weight; however, the alloys are difficult to castbecause of their tendency for hot tearing. In this work, semi-solid gravity casting of analuminum-copper alloy, B206, was conducted in constrained rod casting molds to study the feasibilityof using the process to reduce or eliminate hot tearing. To demonstrate the feasibility of gravitycasting of the metal slurries, a fluidity test was also conducted. Results show that the hot tearingsusceptibility of the aluminum-copper B206 alloy cast in semi-solid state is lower than those cast inliquid state with high superheat temperatures. The grain size of the semi-solid cast Al-Cu samplesappears to be finer than those cast in liquid state with high superheat temperatures. In addition, themetal slurries had sufficient fluidity to fill the molds even with low gravity pressures. The resultssuggest that semi-solid gravity casting is a feasible process to help reduce hot tearing
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/22/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.116-117.76.pdf
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