EP 3411508 A1 20181212 - THICK AL - CU - LI - ALLOY SHEETS HAVING IMPROVED FATIGUE PROPERTIES
Title (en)
THICK AL - CU - LI - ALLOY SHEETS HAVING IMPROVED FATIGUE PROPERTIES
Title (de)
DICKE BLECHE AUS AL- CU - LI LEGIERUNG MIT VERBESSERTEN ERMÜDUNGSEIGENSCHAFTEN
Title (fr)
TÔLES ÉPAISSES EN ALLIAGE AL CU LI À PROPRIÉTÉS EN FATIGUE AMÉLIORÉES
Publication
Application
Priority
- FR 1650850 A 20160203
- FR 2017050255 W 20170203
Abstract (en)
[origin: CA3012956A1] The invention relates to a rolled product having a thickness of at least 50 mm made of aluminium alloy comprising, in % by weight, 2.2% to 3.9% of Cu, 0.7% to 1.8% of Li, 0.1% to 0.8% of Mg, 0.1% to 0.6% of Mn; 0.01% to 0.15% of Ti, at least one element chosen from Zn and Ag, the amount of said element, if it is chosen, being 0.2% to 0.8% for Zn and 0.1% to 0.5% for Ag, optionally at least one element chosen from Zr, Cr, Sc, Hf, and V, the amount of said element, if it is chosen, being 0.04% to 0.18% for Zr, 0.05% to 0.3% for Cr and for Sc, 0.05% to 0.5% for Hf and for V, less than 0.1% of Fe, less than 0.1% of Si, the remainder being aluminium and inevitable impurities, having a content of less than 0.05% each and 0.15% in total; characterized in that its granular structure is predominantly recrystallised between ¼ and ½ thickness. The invention also relates to the process for manufacturing such a product. The products according to the invention are advantageously used in aircraft construction, in particular for the production of an aircraft wing spar or rib.
IPC 8 full level
C22C 21/12 (2006.01)
CPC (source: EP US)
C22C 21/12 (2013.01 - EP US); C22C 21/14 (2013.01 - EP US); C22C 21/16 (2013.01 - EP US); C22C 21/18 (2013.01 - EP US); C22F 1/057 (2013.01 - EP US)
Citation (search report)
See references of WO 2017134405A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
FR 3047253 A1 20170804; FR 3047253 B1 20180112; BR 112018014770 A2 20181218; BR 112018014770 B1 20221116; CA 3012956 A1 20170810; CA 3012956 C 20231003; CN 108603253 A 20180928; CN 108603253 B 20210319; EP 3411508 A1 20181212; EP 3411508 B1 20200408; US 2019040508 A1 20190207; US 2024035138 A1 20240201; WO 2017134405 A1 20170810
DOCDB simple family (application)
FR 1650850 A 20160203; BR 112018014770 A 20170203; CA 3012956 A 20170203; CN 201780009624 A 20170203; EP 17707940 A 20170203; FR 2017050255 W 20170203; US 201716074661 A 20170203; US 202318448998 A 20230814