Effects of Microstructure on the Incipient Fatigue and Fretting Crack Processes in Al-Cu-Li Alloys

    Volume 7, Issue 4 (April 2010)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 29 April 2010

    Page Count: 9


    Delacroix, Jessica
    Université de Lyon/INSA-Lyon, Laboratoire MATEIS, CNRS UMR 5510École Centrale de Lyon, Laboratoire LTDSAlcan Centre de Recherches de Voreppe, Villeurbanne CedexEcully CedexVoreppe Cedex,

    Buffiere, Jean-Yves
    Université de Lyon/INSA-Lyon, Laboratoire MATEIS, CNRS UMR 5510, Villeurbanne Cedex,

    Fouvry, Siegfried
    École Centrale de Lyon, Laboratoire LTDS, Ecully Cedex,

    Danielou, Armelle
    Alcan Centre de Recherches de Voreppe, Voreppe Cedex,

    (Received 18 May 2009; accepted 10 March 2010)

    Abstract

    The influence of microstructure on the crack nucleation and growth under fatigue and fretting loadings was investigated on two different Al-Cu-Li alloys used for aerospace applications (2050-T8 and 2196-T8) and containing different hardening precipitates (mainly T1 precipitates for 2050-T8 and T1 for 2196-T8). Fatigue tests have been carried out on specimens with a central hole to take into account the stress concentration present in riveted plates. The number of cycles for crack initiation in fatigue is found to be smaller in the plate which contains larger intermetallic particles. Concerning the fretting tests, cracking seems to be essentially controlled by contact conditions and no influence of precipitation microstructure was observed for the experimental conditions investigated.


    Paper ID: JAI102530

    DOI: 10.1520/JAI102530

    ASTM International is a member of CrossRef.

    Author
    Title Effects of Microstructure on the Incipient Fatigue and Fretting Crack Processes in Al-Cu-Li Alloys
    Symposium Ninth International ASTM/ESIS Symposium on Fatigue and Fracture Mechanics (37th ASTM National Symposium on Fatigue and Fracture Mechanics), 2009-05-22
    Committee E08