Measurement of Air Entrainment During Pouring of an Aluminum Alloy
Air entrainment during mold filling leads to oxide inclusions that can severely diminish the mechanical properties of castings. Despite this, the volume of air that is entrained during pouring of liquid metals has never been quantified. The present research focuses on air entrainment for a liquid aluminum alloy jet plunging into a pool. Experimental measurements with argon and air atmospheres are performed to determine the total volume of gas entrained during pouring and the volume of oxygen consumed. They are used to validate a previously developed model that predicts air entrainment as part of a casting simulation. The measured entrainment ratios from the experiments conducted in an argon atmosphere are in approximate agreement with the previously developed model. A large difference between entrainment ratios for argon and air atmospheres is found.
KeywordsCasting Pouring Air entrainment Oxide inclusions Aluminum
The authors wish to thank David Weiss, Dan Hoefert, and the rest of the team at Eck Industries for providing the use of their foundry and support during the aluminum experiments. F. V. Guerra acknowledges CONACYT for the scholarship provided to him during his postdoctoral stay at the University of Iowa.
This American Metalcasting Consortium (AMC) project is sponsored by the Defense Logistics Agency Troop Support, Philadelphia, PA and the Defense Logistics Agency Research & Development (R&D) Office, Ft. Belvoir, VA.
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