Damage tolerance property comparisons for 2000 and 8000 series aluminium plate alloys

Damage tolerance property comparisons for 2000 and 8000 series aluminium plate alloys

Wanhill, R.J.H.
Schra, L.
't Hart, W.G.J.

National Aerospace Laboratory NLR

1995-01-31

This report compares the mechanical properties, fracture toughness and fatigue crack growth properties of the damage tolerant/medium strength aluminium plate alloys 2024-T351, 2324-T39, 8090-T651 and 8090-T8171. The main objective, in view of previous work, was to determine whether damage tolerant 8090-T8171 plate can advantageously replace the industry standard damage tolerant 2024-T351 alloy. From the results it may be concluded that the 8090 alloys possessed combinations of strength and fracture toughness intermediate between those of 2024-T351 (lower) and 2324-T39 (higher). And in the in-service inspectable fatigue crack growth regime the 8090 alloys demonstrated better or equivalent fatigue crack growth properties compared with the 2000 series alloys. In view of these results, and the fact that 8090-T8171 had a much improved short transverse fracture toughness compared to the earlier 8090-T651 material, it is concluded that from an engineering property viewpoint there would appear to be significant advantages in replacing 2024-T351 by 8090-T8171.

Aluminum alloys
Crack propagation
Fatiguelife
Flightsimulation
Gust loads
Mechanical properties
Aluminium-lithium alloys
Cumulative damage
Fatgue strength
Fractography
High srength alloys
Surface roughness

http://resolver.tudelft.nl/uuid:f2a87e06-b891-47db-a659-8c9f4b768269

Nationaal Lucht- en Ruimtevaartlaboratorium

Campus only

NLR Technical Publication TP 95068 U

Aerospace Engineering Reports

report

(c)1995 National Aerospace Laboratory NLR