EP 0570910 A1 19931124 - High strength and high toughness aluminum alloy structural member, and process for producing the same.

Title (en)

High strength and high toughness aluminum alloy structural member, and process for producing the same.

Title (de)

Hochfestes Konstruktionselement aus einer Aluminiumlegierung mit hoher Zähigkeit und Verfahren zu ihrer Herstellung.

Title (fr)

Pièce d'un alliage d'aluminium à haute résistance mécanique et haute ténacité et procédé pour sa fabrication.

Publication

EP 0570910 A1 19931124 (EN)

Application

EP 93108091 A 19930518

Priority

JP 12651092 A 19920519
JP 13395792 A 19920526
JP 15607192 A 19920522

Abstract (en)

A high strength and high toughness aluminum alloy structural member is produced by crystallization of an aluminum alloy blank having a metallographic structure including an amorphous phase. The structural member includes an aluminum crystal matrix and intermetallic compound crystals dispersed in the aluminum alloy matrix. If the average grain size of aluminum crystals is represented by d1, and the grain size of the intermetallic compound crystals is represented by d2, the average percentage P1 of the total number of small intermetallic compound crystals having the grain size d2 equal to or less than d1/2 (d2</= d1/2) is set at a value equal to or more than 80 % (P1 >/= 80 %). An increase in strength of the structural member is provided by dispersing the intermetallic compound crystals in the aluminum crystal matrix. With a reduction in size of the intermetallic compound crystals, an impact force on the structural member is absorbed into the aluminum crystals, leading to an increase in toughness of the structural member. <IMAGE>

IPC 1-7

C22C 21/00; C22C 45/08; C22F 1/00

IPC 8 full level

C22C 1/04 (2006.01); C22C 21/00 (2006.01); C22C 45/08 (2006.01); C22F 1/04 (2006.01)

CPC (source: EP)

C22C 1/0416 (2013.01); C22C 21/00 (2013.01); C22C 45/08 (2013.01); C22F 1/04 (2013.01)

Citation (search report)

[X] EP 0475101 A1 19920318 - YOSHIDA KOGYO KK [JP]
[X] US 5073215 A 19911217 - SKINNER DAVID J [US], et al
[X] WO 9112348 A1 19910822 - ALLIED SIGNAL INC [US]
[AD] EP 0339676 A1 19891102 - MASUMOTO TSUYOSHI [JP], et al
[A] EP 0333217 A1 19890920 - MASUMOTO TSUYOSHI [JP], et al
[XP] EP 0534470 A1 19930331 - MASUMOTO TSUYOSHI [JP], et al

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 0570910 A1 19931124

DOCDB simple family (application)

EP 93108091 A 19930518