High cycle fatigue damage evaluation of steel pipelines based on microhardness changes during cyclic loads
Geovana Drumond  1, *@  , Francine Roudet  2@  , I. Pasqualino  1@  , B. Pinheiro  1@  , Didier Chicot  2@  , Xavier Decoopman  2@  
1 : Subsea Technology Laboratory (LTS)
2 : Laboratoire de Mécanique de Lille - FRE 3723  (LML)  -  Site web
Université de Lille, Sciences et Technologies, Ecole Centrale de Lille, Arts et Métiers ParisTech, Centre National de la Recherche Scientifique : FRE3723
Bâtiment M6 Bvd Paul Langevin 59655 VILLENEUVE D ASCQ CEDEX -  France
* : Auteur correspondant

The aim of this work is to investigate changes in material surface microhardness during the different stages of fatigue life. Samples of API 5LX65 grade steel were submitted to high cycle fatigue tests in which different stages of microhardness changes are observed and then correlated to those observed by TEM images.


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