Modern Aluminium Sheet Alloys for Aerospace Applications

摘要

Over the last five years several aluminium sheet alloys have emerged as candidates for replacing the industry standard damage tolerant AlCuMg alloy 2024-T3 in aircraft structures. These alloys include the AlLiCuMgZr (Al-Li) alloys 2091-T84 and 8090-T81, and the AlMgSiCu alloy 6013-T6. In the paper the authors compare all these alloys with respect to mechanical properties, fracture toughness and crack resistance, fatigue crack growth under constant amplitude and flight simulation loading, and corrosion and stress corrosion resistances. The practical significance of the results is discussed, and the current status and prospects are indicated.