The paper deals with the thermal mechanical fatigue (TMF) of stainless steels used for exhaust manifolds. A thermal fatigue test on V-shape specimen was early developed at Ugine & Alz to simulate such thermal and mechanical conditions. The examination of failed specimens indicates that cracks could be generally attributed to out-of-phase TMF. However, in specific cases, in-phase TMF may be dominant. For instance, manifolds made of austenitic stainless steel grades usually fail by in-phase TMF. Based on finite element calculation of the V-shape test, a damage criterion is proposed for out-of-phase TMF, which correlates the amplitude of the viscoplastic strain, the maximal temperature, the dwell time during the thermal cycle and the number of cycles to failure.


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    Titel :

    Thermal Fatigue Design of Stainless Steel Exhaust Manifolds


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Chinouilh, G. (Autor:in) / Herbelin, J. M. (Autor:in) / Santacreu, P. O. (Autor:in)

    Kongress:

    SAE World Congress & Exhibition ; 2007



    Erscheinungsdatum :

    2007-04-16




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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