Fracture toughness of an Al-Li-Cu-In alloy

Fracture toughness of an Al-Li-Cu-In alloy

The crack initiation and growth fracture toughness of select AL-Li-Cu alloy variants are characterized and elucidated. Conventionally processed plates form large DC cast ingots are investigated to eliminate the variation in microstructure associated with laboratory scale and SPF-processed material....

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Veröffentlicht in:Scripta metallurgica et materialia 1992-06, Vol.26 (11), p.1779-1784
Hauptverfasser: Wagner, John A., Gangloff, Richard P.
Format: Artikel
Sprache:eng
Schlagworte:
360103 - Metals & Alloys- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
Applied sciences
COPPER ALLOYS
CRACK PROPAGATION
CRACKS
Exact sciences and technology
FABRICATION
FRACTOGRAPHY
FRACTURE PROPERTIES
Fractures
HARDENING
HEAT TREATMENTS
INDIUM ALLOYS
LITHIUM ALLOYS
MATERIALS SCIENCE
MATERIALS WORKING
MECHANICAL PROPERTIES
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metallic Materials
Metals. Metallurgy
PRECIPITATION HARDENING
THERMOMECHANICAL TREATMENTS
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Beschreibung
Zusammenfassung:The crack initiation and growth fracture toughness of select AL-Li-Cu alloy variants are characterized and elucidated. Conventionally processed plates form large DC cast ingots are investigated to eliminate the variation in microstructure associated with laboratory scale and SPF-processed material. Fracture resistance is characterized using the J-integral method to establish crack initiation and growth behavior at 25 and -185 C. It is shown that state-of-the-art 2090-T81 has superior toughness compared to 2090 + In-T6 at both test temperatures, with the low toughness of 2090 + In-T6 associated with intersubgranular fracture attributed to a high density of subboundary precipitates.
ISSN:0956-716X
DOI:10.1016/0956-716X(92)90552-P