Metal treatment – Process of modifying or maintaining internal physical... – With casting or solidifying from melt
Patent
1995-05-25
1996-11-12
Wyszomierski, George
Metal treatment
Process of modifying or maintaining internal physical...
With casting or solidifying from melt
148564, 148643, 148694, C22F 104
Patent
active
055736084
ABSTRACT:
The present invention relates to a process for producing a superplastic aluminum alloy capable of being used for plastic working such as extrusion, forging and rolling. An object of the present invention is to provide an ingot-made high speed superplastic aluminum alloy in which superplasticity is developed at a strain rate higher than that of conventional static recrystallization type superplastic aluminum alloys, and a process for producing the same. The superplastic aluminum alloy of the invention has structure which is obtained by adding to a basic alloy containing from at least 4.0 to 15% by weight of Mg and from 0.1 to 1.0% by weight of one or more elements selected from the group consisting of Mm, Zr, V, W, Ti, Ni, Nb, Ca, Co, Mo and Ta, and further selective elements of Sc, Cu, Li, Sn, In and Cd, which contains from 0.1 to 4.0% by volume fraction of spheroidal precipitates of intermetallic compounds having a particle size from 10 to 200 nm, and which has a mean grain size from 0.1 to 10 .mu.m.
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Miyake Yoshiharu
Suganuma Tetsuya
Toyota Jidosha & Kabushiki Kaisha
Wyszomierski George
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