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Damage and Crack Initiation Behavior of Duplex Stainless Steel during Cyclic Loading

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Abstract:

Two phase metals during cyclic loading can suffer from non-uniform load or strain sharing between the phases due to elastic/plastic anisotropy. This can strongly influence the fatigue damage and crack initiation behavior. In this study, the fatigue damage and crack initiation behavior of an austenitic-ferritic duplex stainless steel with anneal/quenched and aged conditions has been studied by both experimental investigations and simulation using multi-scale material modeling. It was found, both experimentally and via simulations, that the material damage and crack initiation start in the ferrite phase in the material with the anneal/quenched condition and in either the ferrite or austenite phase in the material with the aged condition, mainly in the weakest phase if the deformation hardening is considered.

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Periodical:

Key Engineering Materials (Volumes 324-325)

Pages:

1117-1122

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.324-325.1117

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Online since:

November 2006

Authors:

Guo Cai Chai, Robert Lillbacka

Keywords:

Duplex Stainless Steel, Fatigue Crack Initiation, Fatigue Damage, Low Cycle Fatigue, Multi-Scale Material Modeling

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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