Fatigue Crack Growth Properties of Aluminium- Lithium Alloy 1441

Prakash, Raghu V and Parida, BK (1997) Fatigue Crack Growth Properties of Aluminium- Lithium Alloy 1441. Technical Report. National Aerospace Laboratories, Bangalore, India.

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This report presents the results of a fatigue and fracture data generation program to evaluate an aluminum-lithium alloy 1441 developed as part of the indigenisation13; program initiated by ADA. The material processing was carried out jointly by Defence Metallurgical Research Laboratory, Hyderahad and Russian Agency, VIAM. The material was supplied in three different thickness: 8 mm, 2 mm and 1.2 mm. Both 2 and 1.2 mm thick sheets were supplied in two variants: clad and unclad. Fatigue crack growth rate tests were conducted on this material at room temperature, both under constant amplitude and Mini LCA spectrum loading. The results are compared with those of an13; Aluminum-Copper alloy BS: L73. Alloy 1441 possesses fatigue crack growth resistance comparable with that of alloy BS: L73 and is fairly isotropic in mechanical property, in contrast with other Al-Li alloys, like 8090, 2090.

Item Type: Monograph (Technical Report)
Uncontrolled Keywords: Fatigue crack growth;Al-Li alloy 1441;Stress ratio effect;Thickness effect;Orientation effect;Clading effect;Comparison with BS:L73
Subjects: ENGINEERING > Structural Mechanics
Depositing User: Smt Bhagya Rekha KA
Date Deposited: 04 May 2006
Last Modified: 24 May 2010 04:11
URI: http://nal-ir.nal.res.in/id/eprint/1276

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