Superplastically-formable Al-Mg-Si product and method

Details Superplastically-formable Al-Mg-Si product and method Superplastically-formable Al-Mg-Si product and method

1997-08-28

2000-05-16

Wyszomierski, George

Metal treatment

Stock

Age or precipitation hardened or strengthened

148417, 148439, 148440, 420535, 420544, 420546, 420902, C22C 2108

Patent

active

060632100

ABSTRACT:
A superplastically formable, aluminum alloy product which consists essentially of about 2-10 wt. % magnesium; at least one dispersoid-forming element selected from the group consisting of: up to about 1.6 wt. % manganese, up to about 0.2 wt. % zirconium, and up to about 0.3 w. % chromium; at least one nucleation-enhancing element for recrystallization selected from: up to about 1.0 wt. % silicon, up to about 1.5 wt. % copper, and combinations thereof. Said alloy product has greater than about 300% elongation at a strain rate of at least about 0.0003/sec and a superplastic forming temperature between about 1000-1100.degree. F. due, in part, to the preferred thermomechanical processing steps subsequently applied thereto. A related method of manufacture is also disclosed herein.

REFERENCES:
patent: 4531977 (1985-07-01), Mishima et al.
patent: 4645543 (1987-02-01), Watanabe et al.

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