Cyclic softening behaviour of a duplex stainless steel. Microstructural origin and modelling – Part II: bi-phased polycrystalline modelling of cyclic behaviour - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Material Prüfung Année : 2009

Cyclic softening behaviour of a duplex stainless steel. Microstructural origin and modelling – Part II: bi-phased polycrystalline modelling of cyclic behaviour

Résumé

This second part aims to propose an extension of the bi-phased polycrystalline model shown in a previous contribution [1], in order to simulate the cyclic softening observed in an austenitic-ferritic stainless steel under uniaxial and non-proportional biaxial cyclic loading [2]. Assuming that the cyclic softening for uniaxial and biaxial non-proportional cyclic loading is due to a rearrangement of dislocations in hard (rich in dislocations) and soft (poor in dislocations) zones in ferritic grains [3], the ferritic single crystal law is modified. The new model parameters are identified from TEM observations [3] and by inverse procedure. Finally, the new model is validated for other cyclic loading paths. A good agreement is observed between simulation and experimental data.
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hal-00401468 , version 1 (03-07-2009)

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  • HAL Id : hal-00401468 , version 1

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Pierre Evrard, Véronique Aubin, Suzanne Degallaix, Djimedo Kondo, Iris Alvarez-Armas. Cyclic softening behaviour of a duplex stainless steel. Microstructural origin and modelling – Part II: bi-phased polycrystalline modelling of cyclic behaviour. Material Prüfung, 2009, 06, pp.354-358. ⟨hal-00401468⟩

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