Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1993-11-04
1996-04-02
Simmons, David A.
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
148690, 148437, 148438, 148439, 148440, 72 60, 72364, C22F 104
Patent
active
055036929
ABSTRACT:
A novel method is disclosed for removing or eliminating anisotropic material properties typically found in conventionally rolled or otherwise processed aluminum-lithium alloy products obtained from conventional aluminum fabrication mills. The method comprises imparting a predetermined amount of strain to the conventionally rolled alloy sheet whereby the alloy experiences dynamic recrystallization. Through this process, the mill-imposed crystallographic texturing, which initially sets up the undesired anisotropic characteristics, is eliminated. A preferred technique for imparting strain to the sheet stock is superplastic forming.
REFERENCES:
patent: 4516419 (1985-05-01), Agrawal
patent: 4874440 (1989-10-01), Sawtell et al.
patent: 5019183 (1991-05-01), Martin
"Metals Handbook" (9th Edition); vol. 8, p. 553; ASM, Metals Park, Ohio, 1985.
Anton Claire E.
Martin Gardner R.
Koehler Robert R.
Lewis Terrell P.
Rockwell International Corp.
Silberberg Charles T.
Simmons David A.
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