Rheocasting an Engine Mounting Bracket in Commercial 7075

Abstract:

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Wrought aluminium alloys are prone to hot tearing when cast into near-net shapes. This problem can be overcome by the novel casting technique of rheo-processing combined with high pressure die casting. An industrial engine mounting bracket is produced by rheo-process commercial 7075 with the patented CSIR-RCS and subsequent high pressure die casting. Section thickness changes and constraining geometry make this a difficult component to rheocast. X-ray radiography is used to evaluate hot tearing over the component and is correlated to piston injection shot profile velocities. Gross hot tearing is significantly reduced by a higher injection velocity but turbulent flow entraps air. Faster injection allows more time for flow before final solidification.

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Periodical:

Edited by:

Hajo Dieringa, Norbert Hort and Karl Ulrich Kainer

Pages:

133-136

DOI:

10.4028/www.scientific.net/MSF.690.133

Citation:

U. A. Curle "Rheocasting an Engine Mounting Bracket in Commercial 7075", Materials Science Forum, Vol. 690, pp. 133-136, 2011

Online since:

June 2011

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$35.00

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