Automotive exhaust decouplers (flexible couplings) are a critical component that must remain leak free in order to meet extended warranty and pollution control requirements. The key component of a decoupler is the bellows, which allows easier fit-up during exhaust system assembly and absorbs vibration during service. This bellows is most often constructed of austenitic stainless steel. Though known for improved corrosion resistance, there are many possible corrosion related failure mechanisms for stainless steels. Nineteen decouplers, taken from standard endurance track tests and from normal highway use, have been destructively examined in order to document which failure mechanisms may cause premature failure and compare the performance of various component materials of construction. As a result of exposure to road salt in track tests and normal winter driving conditions, the decoupler bellows have been found to fail by stress corrosion cracking (SCC), pitting, crevice corrosion, hot salt attack, molten salt attack, accelerated oxidation and fatigue or corrosion-fatigue. Failure analysis results were correlated to laboratory testing results. Also the performance of stainless steel decoupler bellows were compared to units fabricated from more corrosion resistant high nickel alloys.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Failure Mechanisms in Automotive Exhaust Decouplers


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Crum, J. R. (Autor:in) / Eisinger, N. C. (Autor:in) / Parsons, R. S. (Autor:in)

    Kongress:

    SAE 2004 World Congress & Exhibition ; 2004



    Erscheinungsdatum :

    08.03.2004




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Failure Mechanisms in Automotive Exhaust Decouplers

    Crum, J. R. / Eisinger, N. C. / Parsons, R. S. et al. | British Library Conference Proceedings | 2004


    Failure mechanisms in automotive exhaust decouplers

    Crum,J.R. / Eisinger,N.C. / Parsons,R.S. et al. | Kraftfahrwesen | 2004


    New Generation of Flexible Elastomer Exhaust Decouplers: LINKEO™ System

    Thibault, Bertrand / Maas, Clayton A. | SAE | 2005


    New generation of flexible elastomer exhaust decouplers: LINKEOTM system

    Maas,C.A. / Thibault,B. / Paulstra CRC - Hutchinson Worldwide,US | Kraftfahrwesen | 2005