Evaluation of Fatigue and Fracture properties of Al-Li Alloys - Annual Report 1988-89.

Anandan, K and Brahma, KK and Dash, PK and Raju, KN (1989) Evaluation of Fatigue and Fracture properties of Al-Li Alloys - Annual Report 1988-89. Project Report. National Aerospace Laboratories, Bangalore.

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    Abstract

    This annual report describes results obtained to-date on fatigue and fracture properties of Lital-A aluminium lithium alloy. Low cycle fatigue data on 12 .5mm thick material and R-curve results on thinner 1, 2 and 3mm thick material are presented. Fatigue crack growth data under constant amplitude loading reflecting the effect of stress ratio, rolling direction and material thickness are presented. Typical results on the effect of rolling direction under spectrum loading are shown. Fatigue crack growth behaviour of Lital-A series of Al-Li alloys is different from conventional Al-alloys . Lital-A exhibits a higher threshold stress intensity and lower fracture toughness, resulting in less favorable damage tolerance properties.

    Item Type: Proj.Doc/Technical Report (Project Report)
    Uncontrolled Keywords: aluminium-lithium alloy, low cycle fatigue, R-curve, fatigue crack growth, constant amplitude, spectrum loading
    Subjects: ENGINEERING > Structural Mechanics
    Division/Department: Structures Division, Structural Integrity Division, Structures Division, Materials Science Division
    Depositing User: Ms Indrani V
    Date Deposited: 08 Aug 2012 11:08
    Last Modified: 08 Aug 2012 11:08
    URI: http://nal-ir.nal.res.in/id/eprint/10750

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