Title
Engineering property comparisons of PM and IM aluminium alloy forgings
Author
Wanhill, R.J.H.
Schra, L.
Institution
National Aerospace Laboratory NLR
Date
1983-11-23
Abstract
Engineering properties of the PM alloy 7091-T7E69 and the IM alloys 7075-T73, 7175-T736, 7010-T736 and 7050-T736 were compared. The properties considered were strength, fracture toughness, fatigue strength, fatigue crack propagation resistance under constant amplitude and spectrum loading, stress corrosion crack initiation and propagation resistance, and exfoliation corrosion. The PM alloy had a substantially better combination of strength and resistance to stress corrosion and exfoliation and also higher notched fatigue strength at low mean stress levels and long lives. However, the fracture toughness was lower than (L-T orientation) or similar to (T-L orientation) that of the IM alloys, and the resistance to fatigue crack propagation under spectrum loading was greatly inferior. There were only minor differences in properties between the IM alloys.
Subject
strength
fracture toughness
fatigue
fatigue crack growth
stress corrosion
aluminium alloys
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Publisher
Nationaal Lucht- en Ruimtevaartlaboratorium
Access restriction
Campus only
Source
NLR MP 83066 U
Part of collection
Aerospace Engineering Reports
Document type
report
Rights
(c) 1983 National Aerospace Laboratory NLR