Fatigue Fracture of Duplex Stainless Steel with Heterogeneous Nanostructure by Heavy Cold Rolling

Fatigue behaviors of duplex stainless steels with excellent tensile properties brought by heterogeneous nanostructure were examined with changing volume fraction of ferritic-austenitic phases. In as-rolled samples, fatigue strength taken by 107 cycles became double comparing with those of convention...

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Bibliographic Details
Published inTetsu-to-Hagane Vol. 105; no. 2; pp. 272 - 281
Main Authors Yamazaki, Yoshikazu, Kobayashi, Masakazu, Todaka, Yoshikazu, Watanabe, Chihiro, Aoyagi, Yoshiteru, Miura, Hiromi
Format Journal Article
LanguageJapanese
Published The Iron and Steel Institute of Japan 01.02.2019
Subjects
duplex stainless steels
fatigue
fracture
heavy cold rolling
heterogeneous nanostructure
high strength
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Summary:Fatigue behaviors of duplex stainless steels with excellent tensile properties brought by heterogeneous nanostructure were examined with changing volume fraction of ferritic-austenitic phases. In as-rolled samples, fatigue strength taken by 107 cycles became double comparing with those of conventional stainless steels. The volume fraction of ferritic-austenitic phases has not affected fatigue behavior. Further, the fatigue strength was improved additionally 200 MPa by aging heat-treatment after cold rolling. The duplex stainless steels with heterogeneous nanostructure possessed enough fatigue strength even in 3%NaCl solution though its fatigue strength declined.
ISSN:0021-1575
1883-2954
DOI:10.2355/tetsutohagane.TETSU-2018-080