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The structure and properties of rapidly solidified high alloy aluminum materialsA series of 2024 type aluminum alloys modified by additions of 1 to 2% Li were studied to determine the role of the Cu:Li and the (Cu + Mg):Li ratios on resultant strength, ductility, notch-tensile behavior, and crack propagation rates. Ultrasonically gas atomized powders with quench rates of 10 to 100 thousand degrees/s were atomized in an argon atmosphere, producing yields of powder such that almost 100% was finer than 250 microns. The powders are free of gases and porosity, are quite spherical, have few satellites (adhering fine powder particles) and are of uniform microstructure. Strength properties are such that yield strength is 20% greater than for lithium-free 2024 ingot alloy, tensile strength is 10% greater than that of 2024 ingot material, and ductilities are comparable. In terms of specific strength and specific modulus, these RS 2024-Li alloys are significantly better than IM 2024.
Document ID
19820019509
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Grant, N. J.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Date Acquired
August 10, 2013
Publication Date
June 28, 1982
Publication Information
Publication: The Mater. Process. Res. Base of the Mater. Process. Center 73-78 (SEE N82-27382 18-23)
Subject Category
Metallic Materials
Accession Number
82N27385
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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