NASA/TM-209004, Lee, J.A., High-Strength Aluminum Casting Alloy for High-Temperature Applications (MSFC Center Director's Discretionary Fund Final Report, Project No. 97-10), Prepared for Materials and Processes Laboratory, Science and Engineering Directorate, NASA Marshall Space Flight Center, AL 35812, December 1998, pp. 24, Format(s): PDF 255k |
A new aluminum-silicon alloy has been successfully developed at Marshall Space Flight Center that has a significant improvement in tensile strength at elevated temperatures (550 to 700 °F). For instance, the new alloy shows an average tensile strength of at least 90 percent higher than the current 390 aluminum piston alloy tested at 500 °F. Compared to conventional aluminum alloys, automotive engines using the new piston alloy will have improved gas mileage, and may produce less air pollution in order to meet the future U.S. automotive legislative requirements for low hydrocarbon emissions. The projected cost for this alloy is less than $0.95/lb, and it readily allows the automotive components to be cast at a high production volume with a low, fully accounted cost. It is economically produced by pouring molten metal directly into conventional permanent steel molds or die casting
| Keywords: | aluminum-silicon alloy, hypereutectic, hydrocarbon emission, piston, permanent mold casting, dislocations, strengthening mechanisms, wear resistance, global warming, automotive engines, air pollution, 390 alloy, tensile strength |
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| Subjects: | Chemistry and Materials: Metals and Metallic Materials: Aluminum |
| ID Code: | 445 |
| Deposited On: | 19 July 2002 |