Investigation of failures in a series of diesel locomotive axles. It was found that embrittlement of the axle material (made of unalloyed steel with 0,45-0,59 % C, 0,60-0,90 % Mn, min. 0,15 % Si, max. 0,045 % P, max. 0,050 S) occured by liquid babbitt metal (Pb-alloys with a) 3,5 % Sn, 8,1 % Sb, 0,06 % Zn, 0,17 % Cu and b) 3,1 % Sn, 8,6 % Sb, 0,04 % Zn, 0,29 % Cu) embrittlement following intermittent lubrication breakdown. The embrittlement led to the formation of surface cracks that eventually propagated by fatigue until final failure occurred. The microstructure and fractographic analysis are discussed in some detail, the failure mechanisms observed differing in some aspects from those quoted in the literature in other detailed studies.


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    Title :

    Fracture mechanisms in a series of locomotive axle failures


    Additional title:

    Bruchmechanismen in einer Serie von Versagensfällen von Lokomotivachsen


    Contributors:
    Le May, I. (author) / Koul, A.K. (author) / Dainty, R.V. (author)

    Published in:

    Materials Characterization ; 26 , 4 ; 235-251


    Publication date :

    1991


    Size :

    17 Seiten, 23 Bilder, 3 Tabellen, 10 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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