Global Patent Index - EP 1026270 A1

EP 1026270 A1 2000-08-09 - AlCuMg alloy product for aircraft body member

Title (en)

AlCuMg alloy product for aircraft body member

Title (de)

Produkt aus AlCuMg-Legierung für ein Zellenbauteil eines Flugzeuges

Title (fr)

Produit en alliage ALCuMg pour élément de structure d'avions

Publication

EP 1026270 A1 (FR)

Application

EP 00420020 A

Priority

  • FR 9901468 A
  • FR 9910682 A

Abstract (en)

[origin: GB2346381A] Rolled, extruded or forged product made of an AlCuMg alloy processed by solution heat treatment, quenching and cold stretching, to be used in the manufacture of aircraft structural elements, with the following composition (% by weight): <DL TSIZE=11> <DT>Fe<0.15<DD>Si<0.15 Cu:3.8-4.4 Mg:1-1.5 <DT>Mn:0.5-0.8<DD>Zr:0.08-0.15 </DL> other elements: < 0.05 each and < 0.15 total with a ratio R<SB>m</SB>(L)/R<SB>0.2</SB>(L) > 1.25. The invention is particularly applicable to the manufacture of lower wings, and has a set of properties (toughness, crack propagation rate, fatigue strength, residual stress level), that are better than alloy 2024.

Abstract (fr)

L'invention a pour objet un produit laminé, filé ou forgé en alliage AlCuMg, traité par mise en solution, trempe et traction à froid, destiné à la fabrication d'éléments de structure d'avion, de composition (% en poids) : Fe < 0,15 Si < 0,15 Cu : 3,8 - 4,4 Mg : 1 - 1,5 Mn : 0,5 - 0,8 Zr : 0,08 - 0,15 autres éléments : < 0,05 chacun et < 0,15 au total, reste aluminium, et présentant un rapport Rm(L)/R0,2(L) > 1,25. L'invention s'applique plus particulièrement à la fabrication d'intrados d'ailes, présentant un ensemble de propriétés (ténacité, vitesse de propagation de fissure, résistance à la fatigue, niveau de contraintes résiduelles) améliorées par rapport à l'alliage 2024.

IPC 1-7 (main, further and additional classification)

C22C 21/16; C22F 1/057

IPC 8 full level (invention and additional information)

C22C 21/16 (2006.01); C22F 1/057 (2006.01)

CPC (invention and additional information)

C22F 1/057 (2013.01); C22C 21/16 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

EP 1026270 A1 20000809; EP 1026270 B1 20050427; DE 60019655 D1 20050602; DE 60019655 T2 20060202; FR 2789406 A1 20000811; FR 2789406 B1 20010323; GB 2346381 A 20000809; GB 9924277 D0 19991215; US 2002014288 A1 20020207; US 2003217793 A1 20031127; US 6602361 B2 20030805

INPADOC legal status


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