Low plasticity burnishing (LPB) has been investigated as a surface enhancement process and corrosion mitigation method for aging aircraft structural applications. Compressive residual stresses reaching the alloy yield strength and extending to a depth of 1.25 mm (0.050 in.) deeper than typical corrosion damage is achievable. Excellent surface finish can be achieved with no detectable metallurgical damage to surface and subsurface material. Salt fog exposures of 100 and 500 h reduced the fatigue strength at 2 x 10 6 cycles by 50%. The LPB of the corroded surface, without removal of the corrosion product or pitted material, restored the 2 x 10 6 fatigue strength to greater than that of the original machined surface. The fatigue strength of the corroded material in the finite life regime (104 to 106 cycles) after LPB was 140 MPa (20 ksi) higher than the original uncorroded alloy and increased the life by an order of magnitude. Ease of adaptation to computer numerical control (CNC) machine tools allows LPB processing at costs and speeds comparable to machining operations. Low plasticity burnishing offers a promising new technology for mitigation of corrosion damage and improved fatigue-life of aircraft structural components with significant cost and time savings over current practices.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Low cost corrosion damage mitigation and improved fatigue performance of low plasticity burnished 7075-T6


    Beteiligte:
    Prevey, P.S. (Autor:in) / Cammett, J. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2001


    Format / Umfang :

    8 Seiten, 18 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    Fatigue crack growth from corrosion damage in 7075-T6511 aluminium alloy under aircraft loading

    DuQuesnay, D.L. / Underhill, P.R. / Britt, H.J. | Tema Archiv | 2003


    DRIVER ASSIST SYSTEM HAVING BURNISHED CAMERA MOUNT

    KESAVAMATHAM KARTEEK | Europäisches Patentamt | 2019

    Freier Zugriff

    Analysis of Surface Topography of Diamond Burnished Aluminium Alloy Components

    Varga, Gyula / Ferencsik, Viktória | Springer Verlag | 2017