Residual stress distribution in the As-received aluminum-lithium alloy sheet

Balasingh, C and Gururaja, B and Rohini, S (1993) Residual stress distribution in the As-received aluminum-lithium alloy sheet. Technical Report. National Aerospace Laboratories, Bangalore, India.

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    Abstract

    Aluminium-lithium alloys have received considerable attention from the aircraft industry because of their light weight, high strength to weight ratio and stiffness. The Lital A sheets are supplied in the cold rolled condition . This operation introduces residual stresses . In this report the residual stress distribution across the thickness of an asreceived Lital A sheet of thickness 7 .S9 mm is reported . The stress measurements were done by XRD technique and the layer removal by electropolishing . The residual stresses at the surface, both in the rolling and perpendicular directions, were compressive. The magnitude of stress in the rolling direction was about 1 .75 times that in the perpendicular direction . The compressive stresses decreased steeply with depth and became tensile stress of low magnitude after certain depth.

    Item Type: Proj.Doc/Technical Report (Technical Report)
    Uncontrolled Keywords: A1-Li alloys;Residual stress;x-ray diffraction
    Subjects: CHEMISTRY AND MATERIALS > Composite Materials
    AERONAUTICS > Aerodynamics
    Division/Department: Materials Science Division, Materials Science Division, Materials Science Division
    Depositing User: Mrs Neetu Chandra
    Date Deposited: 11 Jul 2006
    Last Modified: 24 May 2010 09:43
    URI: http://nal-ir.nal.res.in/id/eprint/1667

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