Title:
ALUMINUM ALLOY SHEET EXCELLENT IN HIGH-SPEED SUPERPLASTIC FORMABILITY AND PROCESS OF FORMING THE SAME
Document Type and Number:
WIPO Patent Application WO/1997/008354
Kind Code:
A1
Abstract:
An alloy containing 3.0 to 8.0 wt.% of Mg, 0.001 to 0.1 wt.% of Ti and as small amounts of Fe and Si (as impurities) as 0.06 wt.% or below and the balance consisting of A1 and unavoidable impurities wherein the number per square millimeter of grains of an Al-Fe-Si compound having a diameter of 1 'mu'm or above is 2000 or below, the mean crystal grain diameter is 25 to 200 'mu'm and the elongation is 350 % or above as worked at 350 to 550 �C and a strain rate of 10-2 to 100/s. This alloy may further contain a small amount of Cu, Mn and/or Cr and is formed at a temperature of 350 to 550 �C and a strain rate of 10-3 to 100/s. An aluminum alloy sheet which is excellent in high-speed superplastic formability and therefore can be formed at high temperature and high speed is obtained and the use of this sheet shortens the forming time to improve the productivity.
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Inventors:
YOSHIDA HIDEO (JP)
TANAKA HIROKI (JP)
TAKIGUCHI KOUICHIROU (JP)
TANAKA HIROKI (JP)
TAKIGUCHI KOUICHIROU (JP)
Application Number:
PCT/JP1995/002564
Publication Date:
March 06, 1997
Filing Date:
December 12, 1995
Export Citation:
Assignee:
SUMITOMO LIGHT METAL IND (JP)
YOSHIDA HIDEO (JP)
TANAKA HIROKI (JP)
TAKIGUCHI KOUICHIROU (JP)
YOSHIDA HIDEO (JP)
TANAKA HIROKI (JP)
TAKIGUCHI KOUICHIROU (JP)
International Classes:
C22C21/00; C22C21/06; B21B3/00; C22F1/00; C22F1/047; (IPC1-7): C22C21/06
Foreign References:
| JPH05212562A | 1993-08-24 | |||
| JPH06240395A | 1994-08-30 | |||
| JPH07197177A | 1995-08-01 | |||
| JPH02285046A | 1990-11-22 | |||
| JPH0617178A | 1994-01-25 |
Other References:
See also references of EP 0846781A4
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