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The physical metallurgy of mechanically-alloyed, dispersion-strengthened Al-Li-Mg and Al-Li-Cu alloysPowder processing of Al-Li-Mg and Al-Li-Cu alloys by mechanical alloying (MA) is described, with a discussion of physical and mechanical properties of early experimental alloys of these compositions. The experimental samples were mechanically alloyed in a Szegvari attritor, extruded at 343 and 427 C, and some were solution-treated at 520 and 566 C and naturally, as well as artificially, aged at 170, 190, and 210 C for times of up to 1000 hours. All alloys exhibited maximum hardness after being aged at 170 C; lower hardness corresponds to the solution treatment at 566 C than to that at 520 C. A comparison with ingot metallurgy alloys of the same composition shows the MA material to be stronger and more ductile. It is also noted that properly aged MA alloys can develop a better combination of yield strength and notched toughness at lower alloying levels.
Document ID
19850044976
Document Type
Conference Paper
Authors
Gilman, P. S. (Inco Alloy Products Research Center Suffern, NY, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1984
Subject Category
METALLIC MATERIALS
Meeting Information
Aluminum-lithium alloys II(Monterey, CA)
Distribution Limits
Public
Copyright
Other