Failure of Dowel Bolts in the Bevel Gear Assembly of an Aeroengine

Raghuram, AC and Radhakrishnan, S and Krishnan, RV and Ramachandran, V (1988) Failure of Dowel Bolts in the Bevel Gear Assembly of an Aeroengine. Project Report. National Aerospace Laboratories, Bangalore.

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    Abstract

    A set of six dowel bolts made of a nickel-chromium-molybdenum steel, holding together a bevel gear and a spur gear in an aero engine, failed in service . This led to the separation of the two gears and disruption of drive to the various accessories of. the engine, resulting in an accident. Failure analysis revealed that the bolts had , failed by hydrogen embrittlement, the hydrogen pick up occurring during the phosphating treatment.

    Item Type: Proj.Doc/Technical Report (Project Report)
    Uncontrolled Keywords: Aeroengine, bevel gear assembly, spur gear, dowel bolts, nickelchromium molybdenum steel, accessory gear box, hydrogen embrittlement. ttlement
    Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
    Division/Department: Materials Science Division, Materials Science Division , Materials Science Division, Materials Science Division
    Depositing User: Ms Indrani V
    Date Deposited: 25 Jul 2012 11:55
    Last Modified: 25 Jul 2012 11:55
    URI: http://nal-ir.nal.res.in/id/eprint/10646

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